US Pat. No. 9,625,420

SENSING SENSOR AND SENSING DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A sensing sensor, comprising:
a wiring board that includes a connecting terminal to be connected to a measuring apparatus for measuring an oscillation frequency,
and a depressed portion is formed at one surface side of the wiring board;

a piezoelectric resonator that includes a piezoelectric piece and an excitation electrode disposed at the piezoelectric piece,
the piezoelectric resonator covering the depressed portion, the piezoelectric resonator being secured to the wiring board
such that a vibrating region is opposed to the depressed portion, the excitation electrode being electrically connected to
the connecting terminal, the piezoelectric resonator including an adsorbing film configured to adsorb a sensing object in
a sample solution at one surface side of the piezoelectric piece;

a channel forming member disposed so as to cover a region at one surface side of the wiring board including the piezoelectric
resonator, the channel forming member including an injection port for a sample solution;

a channel formed between the wiring board and the channel forming member, the channel being configured to cause the sample
solution supplied to the injection port to flow through from a one end side to another end side at the one surface side of
the piezoelectric resonator;

an effluent channel disposed at a downstream side of the channel, the effluent channel being configured to discharge the sample
solution inside of the channel by capillarity;

a capillary member having a flat surface parallel to the effluent channel and disposed at a downstream side of the effluent
channel in contact with the sample solution flowing through an inside of the effluent channel, where one end side of the capillary
member projecting from a downstream end of the effluent channel into a portion of an opening of the effluent channel, the
capillary member being configured to cause the sample solution to flow through by the capillarity; and

an absorbing member disposed at a downstream side of the capillary member, the absorbing member being configured to absorb
the sample solution flowing through the capillary member.

US Pat. No. 9,103,748

METHOD FOR DETECTING MICROORGANISMS AND MICROORGANISM DETECTING APPARATUS

NIHON DEMPA KOGYO CO., LT...

1. A method for detecting microorganisms, comprising:
providing a piezoelectric vibrator having electrodes formed on both faces;
supplying a culture medium layer, which is an absorption layer, on the electrode on one face side of the piezoelectric vibrator,
wherein the culture medium layer comprises a sterilized agar medium having a layer thickness of 0.1 ?m to 1 ?m, and a sample
solution in which microorganisms which are detection targets are mixed; and

oscillating the piezoelectric vibrator by an oscillation circuit and measuring an oscillation frequency of the piezoelectric
vibrator causing a proliferation of said microorganisms,

detecting a rate of proliferation of microorganisms is obtained based on a change over time in the oscillation frequency caused
by a mass increase of the microorganisms proliferating in the absorption layer during said oscillating.

US Pat. No. 9,100,023

PIECE-CRYSTAL OSCILLATOR AND OSCILLATION DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A crystal oscillator, comprising:
an oscillation circuit, being connected to a crystal unit for generating an oscillator output;
first and second oscillation circuits, being connected to first and second temperature detection crystal units, respectively;
a heating portion for constantly maintaining an ambient temperature of each of the crystal units;
a frequency difference detection portion that obtains, as a temperature detection value, a digital value corresponding to
a difference value between a value corresponding to a difference between frequencies f1 and f1r and a value corresponding to a difference between frequencies f2 and f2r, where “f1” denotes an oscillation frequency of the first oscillation circuit, “f1r” denotes an oscillation frequency of the first oscillation circuit at a reference temperature, “f2” denotes an oscillation frequency of the second oscillation circuit, and “f2r” denotes an oscillation frequency of the second oscillation circuit at the reference temperature;

an accumulator that accumulates the temperature detection value as the digital value obtained from the frequency difference
detection portion depending on a designated accumulation number;

a rounding processing portion that performs rounding for the temperature detection value accumulated in the accumulator depending
on a rounding factor designated independently from designation of the accumulation number; and

a heating control portion that controls power supplied to a heating portion based on the temperature detection value subjected
to the rounding in the rounding processing portion.

US Pat. No. 9,159,902

RESONATOR

NIHON DEMPA KOGYO CO., LT...

1. A resonator comprising:
an interdigital transducer electrode, being disposed on a piezoelectric thin film;
a resonance part, being held on a substrate through an air gap;
a supporting part, supporting the resonance part; and
two beam parts, connecting the resonance part to the supporting part at both ends of the resonance part,
wherein, the air gap forms a level difference at the supporting part, or
each beam part includes a thin beam part and an extended beam part, wherein the extended beam part is disposed where the air
gap forms the level difference.

US Pat. No. 9,136,821

SURFACE MOUNT DEVICE-TYPE LOW-PROFILE OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. A surface mount device-type low-profile oscillator in which a crystal unit section and an IC chip unit are integrally installed,
wherein
the crystal unit section hermetically seals a crystal unit therein, and includes, on an external surface, an insulation container
provided with an external terminal for acquiring an oscillation output of the crystal unit,

the IC chip unit is a bare chip, and includes, on a surface of the IC chip unit facing to the external terminal provided in
the crystal unit section, an integrated circuit portion that forms an oscillator circuit together with the crystal unit and
a crystal unit connection terminal connected to the external terminal of the crystal unit section; and

the external terminal between a formation surface of the external terminal provided in the insulation container of the crystal
unit section and the surface of the IC chip unit facing to the external terminal and a part of the surface of the IC chip
unit facing to the crystal unit connection terminal are connected through the crystal unit connection terminal, and

an area formed between the external terminal and a part of the surface of the IC chip unit not facing to the crystal unit
connection terminal is directly adhered with an adhesive.

US Pat. No. 9,241,418

SURFACE MOUNT DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A surface mount device, comprising:
a main board on which electronic components are mounted;
a base board; and
a pin adapter, having a plurality of pins, and the pin adapter is fixed on the base board;
wherein tips of the pins that are narrower than the other portions of the pins are inserted into holes disposed in the main
board; and

the main board and the base board are connected with each other,
wherein the base board has no holes for inserting the pins, and
a folded bottom portion of the pin and an electrode pattern disposed on a surface of the base board are electrically connected.

US Pat. No. 9,077,281

OSCILLATOR CIRCUIT

NIHON DEMPA KOGYO CO., LT...

1. An oscillator circuit, comprising:
a crystal oscillator;
a transistor, a base of the transistor is connected to the crystal oscillator;
a first resonance circuit that is between an emitter of the transistor and a ground, the first resonance circuit having a
first inductor and a first capacitor;

a second resonance circuit that is between the emitter and the ground, the second resonance circuit having a second inductor
and a second capacitor; and

a third capacitor that is between the base and the emitter, wherein
a first resonance frequency of the first resonance circuit is higher than a overtone frequency of a main oscillation of the
crystal oscillator,

a second resonance frequency of the second resonance circuit is lower than the overtone frequency of the main oscillation
of the crystal oscillator, and

the oscillator circuit has a negative resistance with a negative value at the overtone frequency of main oscillation of the
crystal oscillator, and has the negative resistance with a positive value (i) at fundamental frequencies of the main oscillation
and a sub oscillation of the crystal oscillator and (ii) at the overtone frequency of the sub oscillation of the crystal oscillator,

the first resonance circuit is a parallel resonance circuit that contains the first inductor and the first capacitor connected
in parallel between the emitter of the transistor and the ground, and

the second resonance circuit is a serial resonance circuit that contains the second inductor and the second capacitor connected
in series between the emitter of the transistor and the ground.

US Pat. No. 9,236,554

PIEZOELECTRIC DEVICE AND METHOD FOR FABRICATING THE SAME

NIHON DEMPA KOGYO CO., LT...

1. A surface mount type piezoelectric device, comprising:
a piezoelectric vibrating piece that includes a vibrator with a pair of excitation electrodes and an extraction electrode
extracted from the pair of excitation electrodes, the vibrator vibrating at a predetermined vibration frequency;

a base plate that includes one principal surface and another principal surface, the piezoelectric vibrating piece being placed
on the one principal surface, a connecting electrode is formed on the one principal surface and being electrically connected
to the extraction electrode, a mounting terminal is formed on the another principal surface; and

a lid plate that seals the vibrator, wherein
at least a part of the mounting terminal includes a first metal film, a second metal film, and an electroless plating film,
the first metal film includes a plurality of laminated metal layers formed by sputtering or vacuum evaporation,
the second metal film includes a plurality of laminated metal layers, the second metal film being formed to cover the first
metal film or being formed at a part of a surface of the first metal film, the second metal film having a different area from
the first metal film, and

the electroless plating film being formed at least on a surface of the second metal film by electroless plating, wherein
the first metal film and the second metal film include a chromium layer, a nickel tungsten layer, and a gold layer,
the nickel tungsten layer is formed on a surface of the chromium layer, and
the gold layer is formed on a surface of the nickel tungsten layer.

US Pat. No. 9,209,379

PIEZOELECTRIC VIBRATION ELEMENT AND PIEZOELECTRIC DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A piezoelectric vibration element, comprising:
a piezoelectric piece that has a rectangular shape with long sides and short sides, the piezoelectric piece including a first
principal surface and a second principal surface, the second principal surface being a backside surface of the first principal
surface, the piezoelectric piece including a mesa portion at least on the first principal surface, the mesa portion being
thicker than a peripheral portion;

a pair of excitation electrodes, formed on the first principal surface and the second principal surface; and
a pair of extraction electrodes, extracted from the pair of excitation electrodes to one of the short sides, wherein
the excitation electrode is larger than an area of the mesa portion and covers the mesa portion on the principal surface where
the mesa portion is formed,

the excitation electrode has a center away from a center of the piezoelectric piece toward a first short side of the short
sides by a first distance, and

the mesa portion has a center away from the center of the piezoelectric piece toward the first short side by a second distance,
and

the second distance is different from the first distance,
wherein the center of the excitation electrode, the center of the piezoelectric piece and the center of the mesa portion are
positioned on a straight line passing through centers of the short sides,

wherein the mesa portion has a quadrilateral shape; and the pair of excitation electrodes has a quadrilateral shape.

US Pat. No. 9,106,200

PIEZOELECTRIC VIBRATING PIECE AND PIEZOELECTRIC DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A piezoelectric vibrating piece comprising:
an excitation unit in a rectangular shape including a first side and a second side, the first side extending in a first direction,
the second side extending in a second direction perpendicular to the first direction;

a framing portion that surrounds the excitation unit and has a space; and
a connecting portion that connects the first side of the excitation unit and the framing portion, the connecting portion having
a first thickness in a third direction perpendicular to the first direction and the second direction, wherein the excitation
unit includes a first region, a second region, and a third region, a pair of excitation electrodes are disposed on two main
surfaces of the first region, the second region includes at least a part of the first side, the second region with the first
thickness being directly connected to the connecting portion, the third region is disposed between the first region and the
second region, the third region is a region other than the first region and the second region, the third region has a second
thickness in the third direction, and a thickness of the second region in the third direction is thicker than the second thickness,
wherein the space of the framing portion is located at regions other than the connecting portion between the excitation unit
and the framing portion.

US Pat. No. 9,063,068

SHORT AXIS OSCILLATING ULTRASONIC PROBE

Nihon Dempa Kogyo Co., Lt...

1. A short axis oscillating ultrasonic probe comprising:
a sealed container having a short axis direction;
a liquid that serves as an acoustic medium filled within said sealed container;
a piezoelectric element group housed within the sealed container that is arranged in a long axis direction, said piezoelectric
group having:

an acoustic lens on an ultrasonic wave transmitting and receiving surface of the piezoelectric group, the acoustic lens having
an inner surface facing the piezoelectric group, said acoustic lens provided on a rotational retention base which rotates
and oscillates in said short axis direction of said piezoelectric element group whereby ultrasonic waves that are transmitted
and received from said ultrasonic wave transmitting and receiving surface of said piezoelectric element group are mechanically
scanned in said short axis direction; and

a projecting section respectively fixed to both end sides of said acoustic lens and positioned in said long axis direction
wherein each projection section includes an arc shape on a tip section thereof that is positioned above an outer surface of
the acoustic lens and extends along a profile of an inner peripheral shape defined by a cover portion of said sealed container
for absorbing unwanted ultrasonic waves that propagate in the long axis direction between said ultrasonic wave transmitting
and receiving surface and an inner circumferential surface of said sealed container.

US Pat. No. 9,160,343

HEATER DEVICE AND OSCILLATION APPARATUS

NIHON DEMPA KOGYO CO., LT...

1. A heater device, comprising:
a temperature detector, configured to detect a temperature of a temperature-controlled object;
a heater control circuit, configured to output a control voltage based on a temperature detection value of the temperature
detector, and a temperature target value;

a heater, configured to cause heat generation by supply of the control voltage from the heater control circuit, and to provide
higher output as the control voltage decreases, so as to heat the temperature of the temperature-controlled object to a target
temperature;

a voltage supply path, configured to supply the control voltage to the heater; and
an overheat prevention circuit, configured to prevent excessive heat generation of the heater when the heater control circuit
becomes abnormal, wherein

the overheat prevention circuit includes:
a positive-temperature-coefficient thermistor, being interposed in the voltage supply path in a position heated by the heater;
and

a pull-up resistor, including one end connected between the heater and the positive-temperature-coefficient thermistor, and
another end connected to a direct current power source,

wherein the control voltage to be applied to the heater is restricted to a voltage at a connection point between the positive-temperature-coefficient
thermistor and the pull-up resistor, when the control voltage from the heater control circuit abnormally decreases.

US Pat. No. 9,164,063

SENSING DEVICE, SENSING SYSTEM, AND SENSING METHOD

NIHON DEMPA KOGYO CO., LT...

1. A sensing device to be connected to one of a plurality different kinds of piezoelectric resonators for sensing a target
substance in a sample fluid based on oscillation frequency of the connected piezoelectric resonator, wherein
the connected piezoelectric resonator comprising:
a piezoelectric piece;
an electrode disposed on the piezoelectric piece; and
an adsorbing layer located on the electrode, the adsorbing layer adsorbing the target substance in the sample fluid, wherein
the connected piezoelectric resonator is configured to change a natural frequency of the connected piezoelectric resonator
by adsorbing the target substance, wherein

the sensing device comprises:
an oscillator circuit commonalized for the plurality different kinds of piezoelectric resonators having different crystal
impedance values, and configured to be driven with voltages for the plurality different kinds of piezoelectric resonators,
so that each of the corresponding voltages is corresponding to the crystal impedance value of the connected piezoelectric
resonator, wherein the connected piezoelectric resonator is connected to the oscillator circuit;

a voltage supply unit configured to supply a DC drive voltage to the oscillator circuit, so that the oscillator circuit is
driven with the DC drive voltage corresponding to the crystal impedance value of the connected piezoelectric resonator;

an information obtaining unit configured to obtain a type-information of the connected piezoelectric resonator; and
a voltage adjusting unit configured to adjust the DC drive voltage to a voltage corresponding to the connected piezoelectric
resonator based on the type-information obtained by the information obtaining unit.

US Pat. No. 9,154,076

DUAL-MODE CRYSTAL OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. A dual-mode crystal oscillator, comprising:
a single AT-cut quartz crystal piece configured to vibrate at an MHz band;
a package that houses the AT-cut quartz crystal piece and includes a mounting surface to be mounted, the mounting surface
having a rectangular shape with a long side and a short side; and

an integrated circuit housed in the package, the integrated circuit including an oscillation circuit configured to cause the
AT-cut quartz crystal piece to oscillate at a frequency in the MHz band, a dividing circuit configured to divide the frequency
in the MHz band to generate a frequency of 32.768 kHz, a selection circuit configured to select a pause state where the frequency
in the MHz band is not output but the frequency of 32.768 kHz is output or an active state where the frequency in the MHz
band is output and the frequency of 32.768 kHz is output, wherein

the mounting surface includes three electrodes arranged in a direction along the long side and two electrodes arranged in
a direction along the short side, and

the electrode to output the frequency of 32.768 kHz and the electrode to output the frequency in the MHz band are arranged
not adjacent to one another in the long side direction nor in the short side direction.

US Pat. No. 9,130,506

PIEZOELECTRIC OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. A piezoelectric oscillator comprising a transistor, wherein:
one end of a resonant circuit is connected to a gate of the transistor;
another end of the resonant circuit is grounded via a resistor;
an output terminal is provided for a drain of the transistor;
a piezoelectric resonator for causing reflection by resonance is connected to a source of the transistor;
the piezoelectric resonator serving as a reflective element resonates by use of reflection characteristics and output an oscillation
frequency; and

the oscillation frequency of the piezoelectric resonator and a resonance frequency of the resonant circuit are set to substantially
the same frequency.

US Pat. No. 9,450,564

ELASTIC WAVE FILTER

NIHON DEMPA KOGYO CO., LT...

1. An elastic wave filter, comprising:
a piezoelectric substrate;
an input side interdigital transducer (IDT) electrode that includes a pair of busbars and an electrode finger, the pair of
busbars being arranged so as to be separated from one another in a direction perpendicular to a propagation direction of an
elastic wave on the piezoelectric substrate, the electrode finger each extending from each of the pair of busbars toward an
opposed busbar in a comb shape;

an output side IDT electrode that includes a pair of busbars and an electrode finger, the pair of busbars being disposed at
positions separating in the propagation direction of the elastic wave with respect to the input side IDT electrode, the pair
of busbars being arranged so as to be separated from one another in the direction perpendicular to the propagation direction
of the elastic wave on the piezoelectric substrate, the electrode finger each extending from each of the pair of busbars toward
an opposed busbar in a comb shape; and

a reflector that includes a pair of reflector busbars and a reflector electrode finger, when viewed from a line arrangement
of the input side IDT electrode and the output side IDT electrode, the respective pair of reflector busbars being arranged
at one side and another side in the propagation direction of the elastic wave, the pair of reflector busbars being disposed
so as to be separated from one another in the direction perpendicular to the propagation direction of the elastic wave, the
reflector electrode finger connecting between the reflector busbars, wherein:

assuming that a length dimension at which the electrode fingers adjacent to one another intersect is referred to as an intersection
length, at least one IDT electrode among the input side IDT electrode and the output side IDT electrode is weighted only with
a main lobe among an apodized weighting method, such that the intersection length becomes short from a part at which one electrode
finger is opposed to another electrode finger adjacent to the one electrode finger toward an end portion of the at least one
IDT electrode in the propagation direction of the elastic wave, and

a part with the largest intersection length in the at least one IDT electrode is shifted to any one of one side and another
side in the propagation direction of the elastic wave from a center position at the at least one IDT electrode in the propagation
direction of the elastic wave,

wherein the input side IDT electrode and the output side IDT electrode are each weighted with the apodized main lobe,
when viewed from one reflector among the pair of reflectors, the part with the largest intersection length at the input side
IDT electrode is disposed at a position shifted to one side from the center position at the input side IDT electrode in the
propagation direction of the elastic wave, and

when viewed from the one reflector, the part with the largest intersection length at the output side IDT electrode is disposed
at a position shifted to the one side from the center position at the output side IDT electrode in the propagation direction
of the elastic wave.

US Pat. No. 9,378,935

GEIGER-MULLER COUNTER TUBE AND RADIATION MEASUREMENT APPARATUS

NIHON DEMPA KOGYO CO., LT...

1. A Geiger-Muller counter tube, comprising:
a cylindrical enclosing tube, having a space which is sealed;
an anode electrode, being disposed inside the space, and the anode electrode is formed in a rod shape;
a cathode electrode in a cylindrical shape, surrounding a peripheral area of the anode electrode inside the space, and the
cathode electrode having an opening; and

an inert gas and a quenching gas, being sealed inside the space, wherein
at least one of the anode electrode and the cathode electrode includes a plurality of electrodes inside the enclosing tube
to at least form a first radiation detecting unit and a second radiation detecting unit; and

a shielding portion that blocks ?-ray by surrounding a peripheral area of the first radiation detecting unit from the outside
of the enclosing tube.

US Pat. No. 9,209,002

GEIGER-MULLER COUNTER TUBE AND RADIATION MEASUREMENT APPARATUS

NIHON DEMPA KOGYO CO., LT...

1. A Geiger-Muller counter tube, comprising:
an enclosing tube that is at least partially cylindrical and has a space which is sealed;
an anode conductor, including an anode electrode and a linear first metal lead portion, the anode electrode being arranged
inside the space and formed in a rod shape, the first metal lead portion being connected to the anode electrode and supported
at an end of the enclosing tube;

a cathode conductor, including a cathode electrode in a cylindrical shape and a linear second metal lead portion, the cathode
electrode surrounding a peripheral area of the anode electrode inside the space, the second metal lead portion being connected
to the cathode electrode and supported at the end of the enclosing tube; and

an inert gas and a quenching gas, being sealed inside the space, wherein
the cathode electrode has a side surface through a part of which a through-hole passes;
wherein
the cathode electrode is formed in a cylindrical shape with a rectangular metal sheet, and a pair of sides of the metal sheet
facing to be separately spaced, and

the through-hole is a slit formed where the pair of sides of the metal sheet face to be separately spaced.

US Pat. No. 9,190,980

ELASTIC WAVE FILTER

Nihon Dempa Kogyo Co., Lt...

1. An elastic wave filter comprising:
a first filter part and a second filter part each having tapered IDT electrodes including a plurality of electrode fingers
and a pair of busbars which are disposed as an input-side electrode and an output-side electrode on a piezoelectric substrate
so as to be apart from each other in a propagation direction of an elastic wave;

wherein the input-side electrode of the first filter part and the input-side electrode of the second filter part are arranged
in a direction perpendicular to the propagation direction of the elastic wave, and the output-side electrode of the first
filter part and the output-side electrode of the second filter part are arranged in the direction perpendicular to the propagation
direction of the elastic wave;

wherein, when the first filter part is placed at a lower side and the second filter part is placed at an upper side of the
first filter part, an upper busbar of the pair of busbars is positioned at the upper side in each of the first filter part
and second filter part and a lower busbar of the pair of busbars is positioned at the lower side for both the first filter
part and the second filter part, and the input-side electrode and the output-side electrode of the first filter part are structured
by the plurality of electrode fingers such that a cycle unit ? becomes smaller toward the upper busbar from the lower busbar,
and the input-side electrode and the output-side electrode of the second filter part are structured by the plurality of electrode
fingers such that the cycle unit ? becomes larger toward the upper busbar from the lower busbar;

wherein a distance between the pair of busbars of the first filter part and a distance between the pair of busbars of the
second filter part are the same;

wherein said cycle unit ? becomes smaller towards the upper busbar of said first filter part in a same relationship as said
cycle unit ? becomes larger toward the upper busbar for said second filter part for any position along the plurality of electrode
fingers of the first filter part and a corresponding position along the second filter part;

wherein the upper busbar in the input-side electrode of the first filter part and the lower busbar in the input-side electrode
of the second filter part are electrically connected to each other;

wherein the upper busbar in the output-side electrode of the first filter part and the lower busbar in the output-side electrode
of the second filter part are electrically connected to each other;

wherein one of the lower busbar in the input-side electrode of the first filter part and the upper busbar in the input-side
electrode of the second filter part connected to one a first input port and a first ground port, and another of the lower
busbar in the input-side electrode of the first filter part and the upper busbar in the input-side electrode of the second
filter part is connected to another of the first input port and the first ground port; and

wherein one of the lower busbar in the output-side electrode of the first filter part and the upper busbar in the output-side
electrode of the second filter part is connected to one a second output port and a second ground port, and another of the
lower busbar in the output-side electrode of the first filter part and the upper busbar in the output-side electrode of the
second filter part is connected to another of the second output port and the second ground port.

US Pat. No. 9,190,250

RADIATION MEASUREMENT APPARATUS

NIHON DEMPA KOGYO CO., LT...

1. A radiation measurement apparatus for measuring radiation emitted from a sample, comprising:
a first Geiger-Muller counter tube that seals an electrode within a circular pipe-shaped enclosing tube, the enclosing tube
extending in a straight line, the first Geiger-Muller counter tube being arranged along a first direction;

a second Geiger-Muller counter tube that seals an electrode within a circular pipe-shaped enclosing tube, the enclosing tube
extending in a straight line, the second Geiger-Muller counter tube being arranged in a second direction intersecting with
the first direction;

a radiation-direction calculating unit configured to compare a first detection signal and a second detection signal with one
another to calculate a direction of radiation to be emitted from the sample, the first detection signal being output from
the electrode of the first Geiger-Muller counter tube, the second detection signal being output from the electrode of the
second Geiger-Muller counter tube;

a third Geiger-Muller counter tube that seals an electrode within a circular pipe-shaped enclosing tube, the enclosing tube
extending in a straight line, the third Geiger-Muller counter tube being arranged along a third direction perpendicular to
the first direction and the second direction, wherein the radiation-direction calculating unit is configured to compare a
third detection signal, the first detection signal, and the second detection signal with one another, the third detection
signal being output from the electrode of the third Geiger-Muller counter tube;

a fourth Geiger-Muller counter tube that seals an electrode within an enclosing tube, one of an inside of the enclosing tube
and an outside of the enclosing tube being covered with a metal film, the metal film shielding beta ray; and

a computing unit,
wherein the first Geiger-Muller counter tube and the second Geiger-Muller counter tube are each configured to detect beta
ray and gamma ray to be emitted from the sample,

the fourth Geiger-Muller counter tube is configured to detect the gamma ray to be emitted from the sample, and
the computing unit is configured to compute respective amounts of the beta ray and the gamma ray based on the first detection
signal, the second detection signal, and a fourth detection signal, the fourth detection signal being output from the electrode
of the fourth Geiger-Muller counter tube.

US Pat. No. 9,147,831

CRYSTAL UNIT AND METHOD FOR FABRICATING THE SAME

NIHON DEMPA KOGYO CO., LT...

1. A method for fabricating a crystal unit, comprising:
preparing a quartz plate and a supporting substrate with a recess on a surface of the supporting substrate, the recess corresponding
to a vibrating region in the crystal unit, the recess being larger than the vibrating region;

bonding the quartz plate to the surface of the supporting substrate such that the quartz plate is separated from the supporting
substrate in the recess;

separating the quartz plate into the vibrating region and a framing portion by performing dry etching on the quartz plate
such that the quartz plate has a shape, the shape connecting the vibrating region to the framing portion via a supporting
beam, the framing portion surrounding the vibrating region.

US Pat. No. 9,059,676

SURFACE ACOUSTIC WAVE DEVICE AND ELECTRONIC COMPONENT

NIHON DEMPA KOGYO CO., LT...

1. A surface acoustic wave device utilizing surface acoustic waves including a leaky surface acoustic wave (LSAW) having a
frequency equal to or higher than 2 GHz, the surface acoustic wave comprising:
a piezoelectric substrate, configured such that the surface acoustic wave propagates along an X-axis direction on a lithium
tantalate substrate cut perpendicularly to a Y-axis rotated by 45°to 46° around the crystal X-axis;

an IDT electrode, including:
a pair of busbars, each busbar extends along the propagation direction of the surface acoustic wave, and is made of a conductor
film formed over the piezoelectric substrate in parallel with each other, and

electrode fingers, made of a conductive film and arranged to intersect each other in a comb-tooth shape from one of the busbars
to the opposite busbar; and

a reflector, having:
a pair of reflector busbars, formed over the piezoelectric substrate in parallel with each other, each busbar is provided
in one side and the other side of the IDT electrode in the propagation direction of the surface acoustic wave and extends
along the propagation direction of the surface acoustic wave, and

reflector electrode fingers, formed to connect the reflector busbars to each other,
wherein, a thickness of the conductor film in each of the electrode fingers is set to 7.5% ?to 8% ?, where ? denotes a periodic
length of the IDT electrode fingers, and

a metallization ratio expressed as a value obtained by dividing a width D of the IDT electrode finger by a sum of the width
D of the electrode finger and an interval S between the neighboring IDT electrode fingers

is set to 0.55 to 0.60 in order to suppress a frequency change against a change of the metallization ratio.

US Pat. No. 9,543,923

CRYSTAL RESONATOR INCLUDING BLANK AND SUPPORTING PORTION

NIHON DEMPA KOGYO CO., LT...

1. A crystal resonator, comprising:
a blank cut out from a crystal parallel to a surface that includes an X?-axis and a Z?-axis, the X?-axis and the Z?-axis being
respectively obtained by rotating an X?-axis and a Z?-axis by 45° around a Y?-axis in a direction from the Z?-axis toward
the X?-axis, the X?-axis, the Y?-axis, and the Z?-axis being respectively obtained by rotating a crystallographic X-axis,
Y-axis, and Z-axis of the crystal by equal to or more than +37° and equal to or less than 51.5° around the X-axis; and

a supporting portion that supports the blank, wherein
the blank has a reference rectangle having sides respectively parallel to the X?-axis and the Z?-axis, the blank having a
shape where at least one pair of opposite sides bulging outward of the reference rectangle, the blank having two longitudinal
modes of vibration respectively perpendicular with the X?-axial direction and the Z?-axial direction, and

the supporting portion is connected to an outer periphery of the blank at a position near an apex of the reference rectangle,
the position being where a displacement of vibration in the X?-axial direction or the Z?-axial direction becomes a local minimum
when the two longitudinal modes of vibration are coupled.

US Pat. No. 9,369,109

SURFACE ACOUSTIC WAVE DEVICE AND OSCILLATOR CIRCUIT

NIHON DEMPA KOGYO CO., LT...

1. A surface acoustic wave device, comprising:
a quartz substrate constituted such that a surface acoustic wave is to propagate on a surface with an Euler angle of (0°,
?, 0°), a cut angle ? having 16°
a periodic structure portion disposed on the quartz substrate, the periodic structure portion including a plurality of electrodes
extending in a direction intersecting with a direction of the propagation of the surface acoustic wave, the electrodes being
disposed in parallel to one another along the propagation direction, the periodic structure portion being constituted to mainly
contain aluminum, wherein

when a width dimension of the electrode in the propagation direction and a separation dimension between the electrodes adjacent
to one another are respectively defined as L and S, a metallization ratio ? (?=L÷(L+S)) is set to 0.4 or less.

US Pat. No. 9,300,250

SIGNAL LEVEL ADJUSTING DEVICE AND HIGH-FREQUENCY APPARATUS

NIHON DEMPA KOGYO CO., LT...

1. A signal level adjusting device, comprising: a variable attenuator provided in a signal path of frequency signal and in
which an attenuation amount of the frequency signal is adjusted by a control voltage; a detector detecting a signal level
of frequency signal on an output side of said variable attenuator; a comparator in which a detection voltage detected by said
detector and a target voltage corresponding to a target signal level are input and compared, and approximating the detection
voltage to the target voltage; an integration circuit unit integrating an output of said comparator to set the integrated
output to the control voltage; and a low-pass filter provided between said comparator and said integration circuit unit.

US Pat. No. 9,231,599

OSCILLATION APPARATUS

NIHON DEMPA KOGYO CO., LT...

1. An oscillation apparatus for correcting a setting value for an output frequency based on a detection result of an environmental
temperature, the oscillation apparatus comprising:
a first crystal unit, that includes first excitation electrodes on respective surfaces of a first crystal element;
a second crystal unit, that includes second excitation electrodes on respective surfaces of a second crystal element;
an integrated circuit chip, that includes:
a first oscillation circuit and a second oscillation circuit, respectively connected to the first crystal unit and the second
crystal unit; and

a correction unit, configured to provide a signal corresponding to a difference in oscillation frequency between the first
oscillation circuit and the second oscillation circuit as a detection result of a temperature and to correct a setting value
for an output frequency of the first oscillation circuit based on the detection result; and

a container, that houses the first crystal unit, the second crystal unit, and the integrated circuit chip, wherein
distances from a gravity center position of the integrated circuit chip to respective gravity center positions of the first
excitation electrodes and the second excitation electrodes in plan view are denoted by D1 and D2, D1/D2 is within a predetermined
range close to 1.

US Pat. No. 9,306,578

OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. An oscillator, comprising:
an oscillator circuit, being configured to output an oscillation signal;
a crystal filter, having a frequency characteristic where an attenuation at a detuned frequency is larger than an attenuation
at an oscillation frequency of the oscillation signal, and the detuned frequency being a frequency different from the oscillation
frequency;

a package portion that covers a crystal blank of the oscillator circuit and a crystal blank of the crystal filter; and
a heating portion, being configured to heat the crystal blank of the oscillator circuit and the crystal blank of the crystal
filter by using a resistor disposed between a wiring board to which the package portion is secured, and the package portion,

wherein the heating portion includes:
a heat generating portion, being configured to generate heat; and
an adjustment portion, being configured to control ambient temperatures of the oscillator circuit and the crystal filter corresponding
to heat generation of the heat generating portion, wherein

the package portion is heated by transfer of heat generated by the heat generating portion of the heating portion.

US Pat. No. 9,225,342

OSCILLATION DEVICE

NIHON DEMPA KOGYO CO., LT...

1. An oscillation device that corrects a setting value of an output frequency based on a detection result of an ambient temperature
of a crystal unit, the oscillation device comprising:
an oscillation circuit used for an output of an oscillator connected to a crystal unit or an oscillator output;
a temperature detection portion that detects the ambient temperature and outputs a digital value corresponding to the temperature
detection value;

an accumulator that accumulates the digital value based on a predetermined accumulation number;
a first rounding processing portion that performs rounding for the digital value accumulated in the accumulator based on a
predetermined rounding factor;

a digital filter that receives a digital value obtained from the first rounding processing portion and obtains a step response
gradually increasing from “0” and converging to a step value which is an input value; and

a correction value obtaining portion that obtains a frequency correction value of the oscillation frequency of the oscillation
circuit caused by a difference between the ambient temperature and a reference temperature based on an output value of the
digital filter,

wherein the setting value of the output frequency is corrected based on the frequency correction value obtained from the correction
value obtaining portion.

US Pat. No. 9,209,780

PIEZOELECTRIC OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. A piezoelectric oscillator, comprising:
a piezoelectric vibrating piece having a flat rectangular shape, the piezoelectric vibrating piece including a pair of excitation
electrodes and a pair of extraction electrodes disposed on principal surfaces of the piezoelectric vibrating piece, each of
the extraction electrodes being extracted from each of the excitation electrodes to one side of the flat rectangular shape;

an integrated circuit configured to cause the piezoelectric vibrating piece to oscillate at a predetermined frequency; and
a package having a first space where the piezoelectric vibrating piece is placed, and a second space where the integrated
circuit device is placed,

wherein the package includes: a first layer forming a side surface of the first space; a second layer disposed on an inferior
surface of the first layer to form a bottom surface of the first space, a pair of connecting electrodes are disposed on the
bottom surface, the pair of connecting electrodes being electrically connected to the respective extraction electrodes of
the piezoelectric vibrating piece; a third layer disposed on the inferior surface of the second layer to form a ceiling surface
of the second space, the integrated circuit being placed on the ceiling surface; and a fourth layer disposed on the inferior
surface of the third layer to form a side surface of the second space, a plurality of mounting terminals are disposed on the
inferior surface,

the ceiling surface of the second space as a portion of the inferior surface of the third layer has a rectangular shape surrounded
by short sides and long sides, the ceiling surface including a pair of frequency checking terminals electrically connected
to the connecting electrodes and one control terminal to control the integrated circuit,

the pair of the frequency checking terminals are adjacent to one another, the respective frequency checking terminals being
disposed in contact with any of the long sides and one of the short sides, and

the control terminal is extracted to the top surface of the third layer, and then connected to one mounting terminal by a
wiring electrode placed on the top surface of the third layer, and the wiring electrode overlap one of the frequency checking
terminals in a vertical direction.

US Pat. No. 9,143,114

BONDING TYPE CRYSTAL CONTROLLED OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. A bonding type crystal controlled oscillator, comprising:
a crystal package that houses a crystal oscillator; and
a circuit package that houses an electronic circuit component constituting an oscillation circuit with the crystal oscillator,
the circuit package and the crystal package being bonded by two-tier bonding, wherein

the crystal package includes a container that has a back surface facing the circuit package and includes a plurality of output
terminals with a flat shape, the plurality of output terminals forming one step higher than the back surface,

the circuit package includes an upper surface facing the crystal package and a plurality of external terminals with a flat
shape disposed at positions corresponding to the plurality of output terminals formed on the crystal package, the plurality
of external terminals forming one step higher than the upper surface,

an anisotropy conductive adhesive is interposed between the back surface of the crystal package facing the circuit package
and the upper surface of the circuit package facing the crystal package, the anisotropy conductive adhesive including a thermosetting
resin containing solder micro particles dispersed in the thermosetting resin, and

assuming that a thickness of the output terminal formed at the crystal package is C ?m, a thickness of the external terminal
formed at the circuit package is D ?m, and an average outside diameter of the solder micro particles dispersed in the anisotropy
conductive adhesive is E ?m, the dimensional relation is set to (C+D)>E,

wherein assuming that:
a deflection amount between surfaces of the output terminals toward a direction away from the external terminal of the circuit
package is denoted as A (A?0), the plurality of the output terminals with a flat shape being disposed on the back surface
of the container of the crystal package; and

a deflection amount between surfaces of the external terminals toward a direction away from the output terminal of the crystal
package is denoted as B (B?0), the plurality of the external terminals with a flat shape being disposed on the upper surface
of the container of the circuit package,

the crystal package and the circuit package that satisfy a sum of (A+B)?20 ?m are used to be bonded.

US Pat. No. 9,065,418

RESONATOR ELECTRODE MATERIAL EXCELLENT IN AGING PROPERTY, PIEZOELECTRIC RESONATOR USING THE SAME MATERIAL, AND SPUTTERING TARGET MADE OF THE SAME MATERIAL

Nihon Dempa Kogyo Co. Ltd...

1. A resonator electrode material comprising a ternary alloy composed of Au and two metals M1 and M2, for an excitation electrode to excite oscillation in a piezoelectric element, wherein the metal M1 is Ag; and the metal M2 is at least any one of Pd, Ru, Pt, Ir, Rh and Cu; and further, the Au concentration is 20 to 70% by mass and the total concentration
of M1 and M2 is 80 to 30% by mass.

US Pat. No. 9,281,822

OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. An oscillator comprising:
a voltage controlled oscillator;
a PLL circuit that includes digital circuits including a reference signal generating unit, and a circuit unit configured to
extract a signal corresponding to a phase difference between a signal corresponding to an output signal of the voltage controlled
oscillator and a reference signal of the reference signal generating unit;

a crystal unit and an oscillator circuit configured to generate a clock;
a digital control circuit configured to set an oscillation parameter of the oscillator circuit, and a parameter of the PLL
circuit; and

a clock switching unit configured to supply an output signal of the voltage controlled oscillator to the digital control circuit
as a clock signal so as to cause the digital control circuit to operate using the clock signal when powered on, and configured
to supply an output signal of the oscillator circuit to the digital control circuit as a clock signal after the digital control
circuit sets the oscillation parameter of the oscillator circuit, wherein

an initial voltage is supplied to the voltage controlled oscillator as a control voltage when the oscillator is powered on.

US Pat. No. 9,086,338

SENSING DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A sensing device that senses a substance to be sensed in a sample solution by using a piezoelectric sensor having a common
piezoelectric piece on which a piezoelectric resonator is formed by providing two pairs of excitation electrodes arranged
in an X direction to form a first oscillation area and a second oscillation area, in which an absorption layer absorbing the
substance to be sensed in the sample solution is formed on the first oscillation area of the excitation electrodes on one
surface side of the piezoelectric piece, and the absorption layer is not formed on the second oscillation area on said one
surface side, the sensing device comprising:
a channel forming member being contacted on said one surface side of the piezoelectric sensor, having an opposing surface
opposing said one surface side having the first oscillation area and the second oscillation area via a gap, and forming a
reaction channel which is a height of 0.3 mm or less on an area facing said one surface side;

a liquid supply port being provided on one end side in a Y direction orthogonal to the X direction in the reaction channel
and supplying the sample solution to the reaction channel;

a liquid discharge port being provided on another end side in the Y direction in the reaction channel and discharging the
sample solution from the reaction channel; and

a groove part formed by stretching out along a flow direction of a liquid flow in the reaction channel on the opposing surface
to control a liquid flow that suppresses a concentration of liquid flow caused because the first oscillation area has a hydrophilic
property and the second oscillation area has a hydrophobic property due to the presence/absence of the absorption layer,

wherein the first oscillation area and the second oscillation area are provided to sense, when the piezoelectric sensor is
oscillated by oscillator circuits, the substance to be sensed based on oscillation frequencies of these oscillation areas.

US Pat. No. 9,362,885

PIEZOELECTRIC DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A piezoelectric device, comprising:
a piezoelectric vibrating piece that includes: a vibrating portion; a framing portion, surrounding the vibrating portion;
an excitation electrode, disposed in the vibrating portion; and an extraction electrode, electrically connected to the excitation
electrode, the extraction electrode being disposed in the framing portion;

a lid portion, bonded to a front surface of the piezoelectric vibrating piece via a bonding material; and
a base portion that includes an external electrode bonded to a back surface of the piezoelectric vibrating piece via a bonding
material, the external electrode being electrically connected to the extraction electrode, wherein

the excitation electrode and the extraction electrode each include:
a foundation film, formed of metal to be rendered passive; and
a first metal film and a second metal film, laminated to the foundation film, wherein
the foundation film has a film with a thickness of 1.0 nm to 8.0 nm.

US Pat. No. 9,263,989

DIFFERENTIAL OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. A differential oscillator, comprising:
a resonator that has at least a first resonance mode and a second resonance mode;
a differential amplifier circuit configured to oscillate the resonator;
a filter disposed in parallel to the resonator and the differential amplifier circuit, the filter having a first resonance
frequency in the first resonance mode and a second resonance frequency in the second resonance mode, a first impedance of
the filter at one of the first resonance frequency and the second resonance frequency is lower than a second impedance of
the filter at another one of the first resonance frequency and the second resonance frequency, wherein

the differential oscillator has a negative resistance at a frequency at which the second impedance of the filter is higher
while the differential oscillator does not have a negative resistance at a frequency at which the first impedance of the filter
is lower, among the first resonance frequency and the second resonance frequency.

US Pat. No. 9,264,016

PIEZOELECTRIC COMPONENT HAVING A COVER LAYER INCLUDING RESIN THAT CONTAINS TRANSLUCENT FILLER

NIHON DEMPA KOGYO CO., LT...

1. A piezoelectric component, comprising:
a piezoelectric element that includes: a piezoelectric plate; a comb-shaped electrode and an input/output electrode on a principal
surface of the piezoelectric plate; a cover layer disposed above the comb-shaped electrode; and a rib to form a void between
the comb-shaped electrode and the cover layer, wherein

the cover layer includes a photosensitive thermosetting resin in which translucent filler is contained,
wherein the piezoelectric element further includes:
an Under Bump Metal film, disposed at the piezoelectric plate side of the rib; and
a metal thin film, covering the cover layer and hermetically sealing the void,
wherein the piezoelectric component further includes:
an electrode terminal, integrally bonded on the piezoelectric element, the electrode terminal electrically connecting to the
input/output electrode of the piezoelectric element; and

a wiring board with a mounting terminal for external equipment,
wherein at least the piezoelectric plate and the wiring board are resin sealed.

US Pat. No. 9,252,781

OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. An oscillator that uses a differential signal corresponding to a difference between an oscillation output f1 of a first
oscillator circuit and an oscillation output f2 of a second oscillator circuit as a temperature detection value, and outputs
a control signal for reducing an influence caused by a temperature characteristic of the oscillation output f1 based on the
differential signal, the oscillator comprising:
a storage unit that stores a parameter for outputting the control signal;
a signal processing unit connected to a first signal path and a second signal path for respectively extracting the signals
f1 and f2, the signal processing unit being configured to obtain the differential signal from the extracted signals f1 and
f2, and output the control signal based on the differential signal and the parameter;

a first connecting terminal and a second connecting terminal for connecting to an external computer;
a frequency reduction unit connected to the first oscillator circuit and the second oscillator circuit, the frequency reduction
unit being configured to output signals having frequencies that respectively correspond to the frequencies of the signals
f1 and f2 and are lower than the frequencies of the signals f1 and f2; and

a switching unit configured to alternately switch between a first state and a second state, the first state being a state
where the first connecting terminal and the second connecting terminal are connected to the storage unit for access of the
external computer to the storage unit, and the second state being a state where the first connecting terminal and the second
connecting terminal are respectively connected to the first signal path and the second signal path via the frequency reduction
unit such that the output signals from the frequency reduction unit are extracted to an external frequency measuring unit.

US Pat. No. 9,083,305

ACOUSTIC WAVE FILTER

NIHON DEMPA KOGYO CO., LT...

1. An acoustic wave filter, comprising:
(a) an input-side IDT electrode and an output-side IDT electrode arranged on a piezoelectric substrate along an acoustic wave
propagation direction and separated from each other,

(b) the input-side IDT electrode includes a ground port and an input port serves as an input signal port, and the output-side
IDT electrode includes a ground port and an output port serves as an output signal port;

(c) at least one of the input-side IDT electrode and the output-side IDT electrode is configured such that:
(c1) electrode fingers extends from each of a pair of bus bars arranged in parallel with each other to extend along an acoustic
wave propagation direction to an opposite bus bar side, so that a plurality of IDT blocks in which a group of electrode fingers
are arranged in a comb-tooth shape are arranged side by side along the acoustic wave propagation direction and are connected
in series through each of the bus bars;

(c2) among the bus bars located in both ends of a group of the IDT blocks connected to each other in series, the bus bar facing
an area between the input-side IDT electrode and the output-side IDT electrode is connected to the ground port, and the bus
bar located in an opposite side of the area is connected to one of the signal ports;

(c3) a group of the electrode fingers of each IDT block is configured such that a period unit is cyclically repeated along
the acoustic wave propagation direction, said period unit being an overall dimension of three neighboring electrode ringers
extending from one of the bus bars and a single electrode finger neighboring to the three electrode fingers and extending
from the other bus bar out of the pair of the bus bars of each IDT block,

(c4) an interval between the neighboring IDT blocks is set such that the period unit is cyclically repeated in the IDT electrode;
(c5) a space area is formed between the neighboring IDT blocks, and the space area is corresponding to one or more electrode
fingers arranged side by side of the electrode fingers arranged side by side; and

(c6) among the neighboring IDT blocks, the electrode finger disposed at an end portion is extended from the bus bar which
connects the neighboring IDT blocks in series, and the end portion is located next to the space area on the IDT block that
is closer to the connected signal port.

US Pat. No. 9,077,346

OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. An oscillator, comprising:
a crystal unit where a tuning-fork type crystal resonator is sealed in a flat container rectangular in plan view and a pair
of crystal terminals is formed in one surface of the flat container;

an IC chip, a surface opposite to an integrated circuit forming surface of the IC chip being bonded by an adhesive agent between
the pair of crystal terminals on the one surface where the crystal terminal in the flat container of the crystal unit is formed,
and the crystal unit and the IC chip being coated with a resin mold to render a single electronic component;

an adhesive agent flow prevention film placed between each of the pair of crystal terminals and the IC chip to prevent the
adhesive agent from flowing toward the pair of crystal terminals; and

a lead frame disposed in a peripheral area of the pair of crystal terminals and the IC chip in an approximately same surface
as the one surface of the flat container of the crystal unit, wherein

the lead frame includes a wiring part that is connected to an IC terminal of the IC chip by a bonding wire and is buried in
the resin mold, and a mounting terminal forming portion that extends from the wiring part and is folded along an outside of
the resin mold in a back surface that is another surface side opposite to the one surface of the crystal unit so as to form
a mounting terminal.

US Pat. No. 9,077,347

OVEN CONTROLLED CRYSTAL OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. An oven controlled crystal oscillator, comprising:
a crystal unit;
a temperature control circuit configured to control a temperature of the crystal unit; and
a circuit board on which the crystal unit and the temperature control circuit are mounted, wherein
the crystal unit includes a flange that projects outward to an entire outer periphery in one end, and
the circuit board includes a depressed portion in which the flange is partially inserted, wherein
the crystal unit is positioned in a state where the flange is partially inserted in the depressed portion, the crystal unit
being connected to a metal pattern,

wherein the temperature control circuit includes:
a heater resistance having one end, a supply voltage being supplied to the one end to generate heat;
a thermistor having one end and another end, the supply voltage being supplied to the one end, the other end being grounded,
the thermistor being a temperature sensor with a variable resistance value depending on temperature, the thermistor outputting
a voltage corresponding to the temperature to the one end;

a differential amplifier configured to: receive a voltage between the supply voltage and the one end of the thermistor at
one input terminal of the differential amplifier; receive a voltage of a signal line disposed in parallel in the thermistor
at another input terminal of the differential amplifier; and amplify a difference between the voltage input to the other input
terminal and the voltage input to the one input terminal to output as a control voltage, the output of the differential amplifier
being inputted to the one input terminal as feedback via a resistance;

a PNP type power transistor that includes: an emitter to which the other end of the heater resistance is connected; a base
that receives the output of the differential amplifier; and a collector that is grounded; and

a PNP type current ng transistor that includes: an emitter that receives the supply voltage; a base that receives the voltage
between the other end of the heater resistance and the emitter of the power transistor; and a collector connected to the base
of the power transistor, wherein

the collector of the power transistor and the other end of the thermistor are connected and grounded by the metal pattern
that commonly connect.

US Pat. No. 9,735,756

PIEZOELECTRIC DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A piezoelectric device, comprising:
a piezoelectric vibrating piece formed of a piezoelectric material, the piezoelectric vibrating piece including: an excitation
portion, and excitation electrodes formed on both principal surfaces of the excitation portion; and

extraction electrodes, being extracted from the excitation electrodes; and
a base that includes:
a cutout portion, being formed on a side surface of the base;
a mounting terminal, being formed on a principal surface at an opposite side of the principal surface where the piezoelectric
vibrating piece is placed; and

a cutout-portion electrode, being formed in the cutout portion, and the cutout-portion electrode connecting the extraction
electrodes to the mounting terminal, wherein

the extraction electrode includes:
a cutout-portion region, being connected to the cutout-portion electrode;
an excitation-electrode connecting region, being connected to the excitation electrode; and
an erosion preventing region, being disposed between the cutout-portion region and the excitation-electrode connecting region
to prevent erosion by solder, and

the extraction electrode in the erosion preventing region is formed without containing gold (Au) and silver (Ag), and the
extraction electrodes in the cutout-portion region and the excitation-electrode connecting region are formed containing at
least one of gold (Au) and silver (Ag).

US Pat. No. 9,250,637

TEMPERATURE CONTROL DEVICE AND OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. A temperature control device for controlling a temperature of a heated body heated by a heater to a target temperature,
the temperature control device comprising:
a temperature detector that detects a temperature corresponding to the heated body;
a difference operation unit that operates a digital value corresponding to a difference value between a detected temperature
value detected by the temperature detector, and the target temperature;

a controller that calculates a manipulated variable using the digital value operated by the difference operation unit as an
input value and outputs the manipulated variable as the digital value;

a saturation processing circuit unit that being connected to a rear stage of the controller and including a digital circuit
to limit an output value of the controller to a pre-set upper limit value;

a rewritable storage unit that stores the upper limit value, and the upper limit value being read from a storage area of the
rewritable storage unit and being input into the saturation processing circuit unit; and

a conversion unit that converts the output value of the saturation processing circuit unit into an analog signal to output
the converted value as a control command value to the heater.

US Pat. No. 9,240,755

OSCILLATOR CIRCUIT

NIHON DEMPA KOGYO CO., LT...

1. An oscillator circuit, comprising:
a first resonator;
a second resonator, having a frequency characteristic different from a frequency characteristic of the first resonator;
a frequency adjusting unit, being configured to change a ratio between a contribution of the first resonator and a contribution
of the second resonator so as to adjust an output frequency,

wherein the frequency characteristic is a resonance frequency,
the frequency adjusting unit includes:
a first adjusting unit, being configured to adjust a first current value of a first current, the first current flows through
a first path, the first path is connected to the first resonator;

a second adjusting unit, being configured to adjust a second current value of a second current, the second current flows through
a second path, the second path is connected to the second resonator;

a converting unit, being configured to convert the first current and the second current into a voltage corresponding to the
first current value and the second current value; and

an amplifying unit, being configured to amplify a voltage converted by the converting unit and apply the amplified voltage
to the first resonator and the second resonator;

wherein the first adjusting unit includes a first transistor and a first variable resistor, the first transistor causing a
flow of the first current, the first variable resistor being configured to adjust the first current value, and

the second adjusting unit includes a second transistor and a second variable resistor, the second transistor causing a flow
of the second current, the second variable resistor being configured to adjust the second current value.

US Pat. No. 10,043,717

ELECTRONIC DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A crystal oscillator, comprising: a first board, being for mounting an electronic component, and the first board including at least one first hole portion; a second board being mounted on a printed board, and the second board including at least one second hole portion; and at least one support pillar, being inserted into the first hole portion and being disposed in the second hole portion such that the first board and the second board are held mutually separated, wherein the second hole portion is non-through hole and including a tapered surface, and the tapered surface inclines symmetrically toward a center portion of the second hole portion from a surface of the second board; a first metal film attached over the tapered surface and electrically connected to the at least one support pillar.

US Pat. No. 9,256,235

TEMPERATURE CONTROL CIRCUIT AND OVEN CONTROLLED CRYSTAL OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. A temperature control circuit of an oven controlled crystal oscillator, comprising:
an operational amplifier; and
a PNP-type transistor, wherein
a supply voltage is applied to a first terminal of a first resistance, a first terminal of a second resistance, and a first
terminal of a heater resistance,

a second terminal of the first resistance is connected to a first terminal of a thermistor and a second terminal of the thermistor
is connected to a ground,

a second terminal of the second resistance is connected to a first terminal of a temperature sensing element and a second
terminal of the temperature sensing element is connected to the ground,

a connection point between the second terminal of the first resistance and the first terminal of the thermistor is connected
to a first input terminal of the operational amplifier through a third resistance,

a connection point between the second terminal of the second resistance and the first terminal of the temperature sensing
element is connected to a second input terminal of the operational amplifier through a fourth resistance,

an output of the operational amplifier is inputted to the first input terminal by feeding the output back through a fifth
resistance and also inputted to a base of the transistor through a sixth resistance,

a second terminal of the heater resistance is connected to an emitter of the transistor,
a collector of the transistor is connected to the ground,
each of the parts connected to the ground is connected to a ground-common wire, and
the temperature sensing element controls a setting temperature in a thermostatic oven to rise as an ambient operative temperature
rises.

US Pat. No. 9,225,347

OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. An oscillator configured to receive a frequency setting value input to an oscillation circuit portion and obtain a frequency
output corresponding to the frequency setting value from the oscillation circuit portion, the oscillator comprising:
a normal frequency output portion that outputs a digital value corresponding to a normal frequency;
a frequency adjustment factor output portion that outputs a digital value corresponding to a frequency ratio to set a frequency
adjustment factor with respect to the normal frequency based on the frequency ratio;

an interpolation circuit portion that performs interpolation for a digital value of lower-order bits out of the digital value
output from the frequency adjustment factor output portion;

a first adder that adds an output value of the interpolation circuit portion and a digital value of higher-order bits out
of the digital value output from the frequency adjustment factor output portion to output an addition value for designating
the frequency setting value,

a gain output portion that outputs a digital value corresponding to a gain to be multiplied to the addition value output from
the first adder;

a multiplier that multiplies the gain output from the gain output portion by the addition value output from the first adder;
and

a second adder that adds the digital value output from the normal frequency output portion and a digital value output from
the multiplier and outputs an addition value as a frequency setting signal,

wherein a signal output from the interpolation circuit portion is sequential data having first and second values different
from each other and output in synchronization with a clock signal, and

output counts of the first and second values are determined based on a ratio corresponding to the digital value of the lower-order
bits,

wherein a lower limit of a variable frequency width represented as a frequency ratio is allocated to a minimum value of the
digital value that is capable of being set in the frequency adjustment factor output portion,

an upper limit of the variable frequency width represented as a frequency ratio is allocated to a maximum value of the digital
value that is capable of being set in the frequency adjustment factor output portion.

US Pat. No. 9,154,139

CRYSTAL CONTROLLED OSCILLATOR AND OSCILLATING DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A crystal controlled oscillator, comprising:
an oscillator circuit for oscillator output, being connected to a crystal unit for oscillator output;
a first oscillator circuit and a second oscillator circuit, being connected to respective first crystal unit and second crystal
unit for temperature detection;

a heating unit, being configured to uniform an atmosphere temperature where each of the crystal units is placed;
a pulse generator and a frequency difference detector, assume that an oscillation frequency of the first oscillator circuit
is f1, an oscillation frequency of the first oscillator circuit at a reference temperature is f1r, an oscillation frequency
of the second oscillator circuit is f2, and an oscillation frequency of the second oscillator circuit at the reference temperature
is f2r, the pulse generator being configured to output a pulse at a time point where one of the f1 and the f2 latches another
f1 or f2, the frequency difference detector being configured to obtain a direct current voltage corresponding to a difference
value between a value corresponding to a difference between f1 and f1r and a value corresponding to a difference between f2
and f2r with phase locked loop based on a train of the pulses, as a temperature detection value;

an addition unit, being configured to take out a deviation between a temperature setting value of atmosphere temperature where
the first and the second crystal units are placed and the temperature detection value;

a circuit unit, being configured to control heating electric power that controls electric power supplied to the heating unit
based on the deviation taken out at the addition unit;

a frequency measuring unit, being configured to measure a frequency in a set period at the train of pulses;
a determination unit, being configured to determine whether the frequency measured by the frequency measuring unit is included
in a detection range, out of the detection range at a high temperature side, or out of the detection range at a low temperature
side; and

a signal selector configured to: select a control signal where electric power supplied to the heating unit is smaller than
supplied electric power in the detection range in a case where a frequency in a set period at the train of pulses is out of
the detection range at the high temperature side; select a control signal where electric power supplied to the heating unit
becomes a preset value in a case where a frequency in the set period at the train of pulses is out of the detection range
at the low temperature side.

US Pat. No. 9,716,511

SIGNAL PROCESSING DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A signal processing device, comprising:
a plurality of converters, configured to convert analog signals to digital signals based on a clock signal to output the digital
signals;

a generator, configured to generate the clock signal based on a reference signal;
a distributor, configured to distribute a generated clock signal to the plurality of converters;
a first line that passes through only a region assigned to each of the plurality of converters to supply the analog signal
to the converter; and

a second line that passes through only the region to supply a distributed clock signal to the converter.

US Pat. No. 9,614,493

QUARTZ CRYSTAL DEVICE AND METHOD FOR FABRICATING THE SAME

NIHON DEMPA KOGYO CO., LT...

1. A quartz crystal device which is in surface mount type, and the quartz crystal device comprising:
a quartz crystal vibrating piece, configured to vibrate at a predetermined frequency; and
a base plate made of a crystal or a glass, the base plate including an external electrode disposed on a bottom surface of
the base plate to mount the quartz crystal device, the quartz crystal vibrating piece being placed on an opposite surface
of the bottom face, wherein

the external electrode includes a metal film formed on a surface of the base plate by sputtering, and an electroless plating
film formed on a surface of the metal film by electroless plating, and

the electroless plating film includes a nickel layer, and the nickel layer including lead and bismuth.

US Pat. No. 9,762,180

VOLTAGE CONTROLLED OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. A voltage controlled oscillator, comprising:
a front side voltage divider that includes a first resistor connected between a first potential source and a second potential
source, and a first output terminal configured to changeably connect to a connection position in the first resistor so as
to vary an obtained output voltage;

a rear side voltage divider that includes a second resistor connected between the first output terminal and a third potential
source, and a second output terminal configured to changeably connect to a connection position in the second resistor so as
to vary an obtained output voltage; and

an oscillation unit that includes a variable capacitance element with a capacitance varied according to an output voltage
from the second output terminal, the oscillation unit varying an output frequency based on a variation in a resonance point
associated with a variation in the capacitance.

US Pat. No. 10,141,887

OSCILLATOR FOR DETECTING TEMPERATURE OF ATMOSPHERE

NIHON DEMPA KOGYO CO., LT...

1. An oscillator that detects a temperature of an atmosphere where a crystal resonator providing an oscillation output is placed using a temperature detector to stabilize the temperature by controlling a temperature of a heater based on a temperature detection value, the oscillator comprising:a buffer amplifier interposed in a signal path of a control signal generated based on the temperature detection value;
a heater constituted of a transistor having a collector and an emitter positioned between a power source unit and a ground, and a base connected to an output port of the buffer amplifier; and
a first differential amplifier disposed to adjust a gain of the buffer amplifier so as to cancel a voltage fluctuation of the power source unit, the first differential amplifier amplifying a difference between a voltage corresponding to a voltage of the power source unit and a preliminarily set voltage to input to a gain adjustment port of the buffer amplifier.

US Pat. No. 9,876,157

SURFACE MOUNT TYPE QUARTZ CRYSTAL DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A surface mount type quartz crystal device, having a long side direction as a Z?-axis direction, a height direction as
a Y?-axis direction, and a X-axis direction perpendicular to the Y?-axis direction and the Z?-axis direction, and the surface
mount type quartz crystal device comprising:
a ceramic package;
a pedestal blank formed of a quartz-crystal material, the pedestal blank being placed within the ceramic package via a conductive
adhesive;

a quartz-crystal vibrating piece formed in a rectangular shape having a long side and a short side, the quartz-crystal vibrating
piece including a pair of excitation electrodes and a pair of extraction electrodes, the pair of extraction electrodes being
extracted from the pair of excitation electrodes to one end of the quartz-crystal vibrating piece in an extending direction
of the long side, the quartz-crystal vibrating piece being placed on the pedestal blank, wherein

the conductive adhesive is formed along an outer peripheral side of the pedestal blank so as to avoid overlap with the excitation
electrode viewed in a normal direction of the excitation electrode, and the Y?-axis direction is the normal direction, and

the pedestal blank is formed to avoid a region where a distance from the quartz-crystal vibrating piece is equal to or smaller
than a size of a clearance between the pedestal blank and the quartz-crystal vibrating piece at the outer peripheral side,
in a region where the excitation electrode faces at the pedestal blank side viewed in the normal direction, and

the excitation electrode on the quartz-crystal vibrating piece is arranged so as not to have the pedestal blank and the conductive
adhesive overlapped in the Y?-axis direction that is the normal direction.

US Pat. No. 9,791,412

SENSING DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A sensing device that passes, on one surface side of a piezoelectric piece, a fluid containing a sensing object from a
front side to a rear side and that makes an adsorption layer on a surface of a common electrode formed on the one surface
side of the piezoelectric piece adsorb the sensing object to sense the sensing object, the sensing device comprising:
the common electrode containing a first electrode portion and a second electrode portion which are separated from each other
in a left and right direction, and each of said first and second electrode portions extends along a front and rear direction,
the first electrode portion and the second electrode portion being connected to a common ground electrode;

the first electrode portion being sectioned to a first adsorption region located in the front side and a reference region
located in the rear side, a first adsorption layer being formed on a surface of the first electrode portion in the first adsorption
region, an adsorption layer being not formed on a surface of the first electrode portion in the reference region,

the second electrode portion being sectioned to a reference region located in the front side and a second adsorption region
located in the rear side, the second adsorption layer being formed on a surface of the second electrode portion in the second
adsorption region, an adsorption layer being not formed on a surface of the second electrode portion in the reference region
located in the front side;

when the reference region of the second electrode portion is referred to as a first reference region, and the reference region
of the first electrode portion is referred to as a second reference region, first opposite electrodes which are individually
formed on the other surface side of the piezoelectric piece so as to be opposite the first adsorption region and the first
reference region, respectively;

second opposite electrodes which are individually formed on the other surface side of the piezoelectric piece so as to be
opposite the second adsorption region and the second reference region, respectively;

a flow path formation member for passing, on the one surface side of the piezoelectric piece, the fluid containing the sensing
object from the front side to the rear side;

an oscillation circuit for oscillating the piezoelectric piece;
a frequency measurement portion for measuring an oscillation frequency of the oscillation circuit; and
a control portion for determining:
a first difference between an oscillation frequency of the piezoelectric piece between the first adsorption region and the
first opposite electrode and an oscillation frequency of the piezoelectric piece between the first reference region and the
first opposite electrode, and

a second difference between an oscillation frequency of the piezoelectric piece between the second adsorption region and the
second opposite electrode and an oscillation frequency of the piezoelectric piece between the second reference region and
the second opposite electrode, so as to calculate a sum value of the first difference and the second difference.

US Pat. No. 10,038,423

NOTCH FILTER

NIHON DEMPA KOGYO CO., LT...

1. A high-pass notch filter having a pass band on a high frequency side with respect to an attenuation band, the high-pass notch filter comprising:an input port configured to receive an input signal;
an output port configured to output an output signal;
a first SAW resonator and a second SAW resonator arranged between the input port and the output port, the first SAW resonator being configured to resonate in parallel at a first frequency corresponding to the attenuation band, the second SAW resonator being configured to resonate in parallel at a second frequency corresponding to the attenuation band;
a third SAW resonator having one end and another end, the one end of the third SAW resonator being connected between the first SAW resonator and the second SAW resonator, and the another end of the third SAW resonator being grounded, and the third SAW resonator being configured to resonate in parallel at a third frequency corresponding to the attenuation band;
a first inductor element having one end and another end, the one end of the first inductor element being connected between the first SAW resonator and the third SAW resonator, and the another end of the first inductor element being grounded; and
a second inductor element having one end and another end, the one end of the second inductor element being connected between the second SAW resonator and the third SAW resonator, and the another end of the second inductor element being grounded.

US Pat. No. 10,485,130

SURFACE MOUNT TYPE DEVICE AND MANUFACTURING METHOD FOR THE SAME

NIHON DEMPA KOGYO CO., LT...

1. A surface mount type device, comprising:an electronic component;
a main substrate on which the electronic component is mounted;
a pedestal on which the main substrate is mounted, wherein the pedestal has an outer frame portion and a beam portion which connects two long sides of the outer frame portion;
a lower substrate on which the pedestal is mounted;
a cover mounted on the lower substrate so as to cover the pedestal, wherein
a soldering pattern soldered with the cover from a region where the cover is mounted to an inside of the lower substrate, on the lower substrate; and
the pedestal includes a cut-out portion disposed in a side surface portion of the outer frame portion so as to form a space above the soldering pattern, the cut-out portion is configured not to penetrate the side surface portion of the outer frame portion, and the soldering pattern extends from a region outside of the pedestal to the space formed by the cut-out portion, and
the cover is secured to the soldering pattern by a solder formed in the space.

US Pat. No. 10,164,571

CRYSTAL OSCILLATOR AND METHOD OF MANUFACTURING CRYSTAL OSCILLATORS

NIHON DEMPA KOGYO CO., LT...

1. A crystal oscillator, comprising:a crystal resonator, which is an AT-cut crystal resonator;
a first oscillating circuit that oscillates the crystal resonator at a first frequency;
a first impedance adjusting circuit that adjusts an impedance of a first oscillating system including the crystal resonator and the first oscillating circuit;
a second oscillating circuit that oscillates the crystal resonator at a second frequency that is different from the first frequency at the same time with the first oscillating circuit, the second frequency being an overtone frequency of the crystal resonator;
a second impedance adjusting circuit that adjusts an impedance of a second oscillating system including the crystal resonator and the second oscillating circuit; and
a controlling circuit that controls the first impedance adjusting circuit and the second impedance adjusting circuit, wherein
the first impedance adjusting circuit and the second impedance adjusting circuit include a resistance array that comprises a plurality of resistances, and
the controlling circuit adjusts a resistance value of at least any of the first impedance adjusting circuit and the second impedance adjusting circuit by controlling the resistance array.

US Pat. No. 10,126,268

SENSING SENSOR

NIHON DEMPA KOGYO CO., LT...

1. A sensing sensor, comprising:a common crystal element, having a first vibrating region and a second vibrating region that are constituted with respective excitation electrodes arranged on one surface side and another surface side of the common crystal element, the first vibrating region and the second vibrating region being laterally separated with one another;
an adsorbing film formed on a surface of the excitation electrode in the one surface side corresponding to one vibrating region of the first vibrating region and the second vibrating region, the adsorbing film adsorbing a sensing object in a sample solution;
a blocking layer arranged over a whole region other than a region where the adsorbing film is formed on the excitation electrode in the one surface side, the blocking layer blocking adsorption of the sensing object in the sample solution;
a wiring board including a connection terminal portion to connect the excitation electrode to a frequency measuring unit, the common crystal element being fixed to the wiring board such that the common crystal element forms a space in the another surface side of the first vibrating region and the second vibrating region; and
a channel forming member arranged to cover a region of the one surface side of the wiring board to form a channel that causes the sample solution to flow from a front end side toward a rear end side with the region, the region of the one surface side of the wiring board including the first vibrating region and the second vibrating region in the one surface side of the common crystal element, the channel including an injection port for injecting the sample solution in a front end side of the channel and a discharge port for discharging the sample solution from a rear end side of the channel, wherein
the adsorbing film is arranged such that the adsorbing film is located in a region including a central portion in a front-rear direction of the one vibrating region, and
assuming that a front end portion of the vibrating region is P1, the front end portion of the adsorbing film is P2, and the central portion of the vibrating region is C, the front end portion of the adsorbing film P2 satisfies a relational expression expressed as follows:
(a distance from C to P1)×0.4?(a distance from P1 to P2)?(a distance from C to P1)×0.8.

US Pat. No. 10,374,619

OSCILLATOR CIRCUIT

NIHON DEMPA KOGYO CO., LT...

1. An oscillator circuit comprising:an oscillating unit configured to output an oscillation signal having a frequency corresponding to a frequency setting value being input;
a counter unit configured to count a number of pulses of the oscillation signal during a time period corresponding to a period of a reference signal input from outside;
a set value generator configured to generate the frequency setting value every predetermined time period based on the count of the pulses counted by the counter unit; and
an integration unit configured to calculate an integrated value of a difference between a reference pulse number corresponding to the frequency of the oscillation signal and a pulse number of the oscillation signal every period of the reference signal, and output the integrated value every time period of predetermined times of the period of the reference signal, wherein
the set value generator controls the frequency setting value based on the integrated value.

US Pat. No. 10,367,510

CRYSTAL OSCILLATOR AND METHOD FOR MANUFACTURING CRYSTAL OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. A crystal oscillator comprising:a quartz crystal piece;
a semiconductor chip that includes an oscillator circuit to cause the quartz crystal piece to oscillate and a first bump, the first bump being connected to the oscillator circuit and disposed on a surface of the semiconductor chip facing the quartz crystal piece; and
a temperature sensor bonded to the first bump,
wherein the semiconductor chip further includes a second bump disposed on the surface of the semiconductor chip facing the quartz crystal piece, and
the crystal oscillator further includes a heater bonded to the second bump.

US Pat. No. 10,305,491

OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. An oscillator, including a crystal resonator disposed on a base plate inside a container, and the oscillator outputting a frequency signal with a frequency preliminarily set, the oscillator comprising:a crystal resonator cover, housing the crystal resonator, and the crystal resonator cover being secured to the base plate by soldering;
an oscillator circuit, connected to the crystal resonator;
a temperature detector, detecting a temperature inside the container; and
a heater circuit, increasing or decreasing an output based on the temperature detected by the temperature detector to adjust the temperature inside the container, wherein
the crystal resonator cover is constituted of a phosphorus deoxidized copper.

US Pat. No. 10,298,242

PHASE CONTROL OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. A phase control oscillator that outputs an oscillation signal at a predetermined frequency, the phase control oscillator comprising:a voltage control oscillator, configured to output the oscillation signal based on a control voltage;
a phase comparator, configured to output a phase difference information indicative of a phase difference between a reference signal and the oscillation signal;
a first storage unit, configured to store the phase difference information output from the phase comparator;
a loop filter, configured such that if the phase control oscillator starts operating, the loop filter outputs the control voltage based on the phase difference information stored in the first storage unit to the voltage control oscillator; and
a second storage unit, configured to store a deviation information, and the deviation information being indicative of a deviation between the phase difference when the loop filter outputs the control voltage in a case where the phase control oscillator starts operating and the phase difference indicated by the phase difference information stored in the first storage unit, wherein
after the loop filter outputs the control voltage in response to the phase control oscillator starting operating, the loop filter outputs the control voltage based on the phase difference information output from the phase comparator and the deviation information stored in the second storage unit, to the voltage control oscillator.

US Pat. No. 10,256,825

OVEN CONTROLLED CRYSTAL OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. An oven controlled crystal oscillator having a base and a substrate mounted above the base, comprising:an oscillator circuit, a heater resistor, and a temperature control circuit mounted on the substrate;
a plurality of pins, securing the substrate above the base at a predetermined interval;
a first metal cover, covering the oscillator circuit, the heater resistor, and the temperature control circuit; and
a resin cover, mounted on the base, and the resin cover covering the first metal cover, wherein
an air layer is formed between the first metal cover and the resin cover.

US Pat. No. 10,250,225

AT-CUT CRYSTAL ELEMENT, CRYSTAL RESONATOR AND CRYSTAL UNIT

NIHON DEMPA KOGYO CO., LT...

1. An AT-cut crystal element, comprisinga crystal element having two side surfaces, which are Z?-surfaces, intersecting with a Z?-axis of a crystallographic axis of a crystal, wherein
at least one of the two side surfaces is constituted of three surfaces, which are a first surface, a second surface and a third surface, and the first surface, the second surface and the third surface meeting following conditions (a) to (e):
(a) the first surface, the second surface and the third surface intersect with one another in this order;
(b) the first surface is a surface equivalent to a surface formed by rotating an X-Z?-surface, as a principal surface of the crystal element, expressed by the crystallographic axis of the crystal of the crystal element by 4°±3.5° about an X-axis of the crystal as a rotation axis;
(c) the second surface is a surface equivalent to a surface formed by rotating the principal surface by ?57.5°±3.5° about the X-axis of the crystal as the rotation axis;
(d) the third surface is a surface equivalent to a surface formed by rotating the principal surface by ?42°±3.5° about the X-axis of the crystal as the rotation axis; and
(e) expressing an angle which is the angle close to 4° of the first surface as ?1, a length of the first surface along a Z?-direction of the crystal as D, a thickness of a part of the crystal element having the principal surface as t, and M=D/t, and a conversion percentage from a thickness twist vibration to a surface-shear vibration of the crystal element as fn (M, (?1)), where, n=1 or 2, the ?1 and the M are set such that the conversion percentage fn (M, (?1)) becomes a predetermined value Th or less.

US Pat. No. 10,425,037

OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. An oscillator, comprising:an oscillator circuit, configured to output a plurality of oscillation signals using a crystal resonator; and
a substrate, connected to the oscillator circuit, wherein the substrate includes:
a first crystal resonator land and a second crystal resonator land that are electrically connected to the crystal resonator;
a power source land, electrically connected to a power source; and
a first output land, positioned between the first crystal resonator land and the power source land to output a first oscillation signal from the oscillator circuit to an outside, wherein,
a first wiring pattern from the first output land is wired toward a direction and passes through between the first crystal resonator land and the second crystal resonator land, and
a second wiring pattern from the power source land is wired toward the direction.

US Pat. No. 10,393,706

MECHANICAL SCANNING 3D ULTRASONIC TRANSDUCER

NIHON DEMPA KOGYO CO., LT...

1. An ultrasonic transducer, comprising:a housing that internally includes an ultrasound transmitting/receiving unit, and the housing sealing an ultrasonic propagation liquid;
a driving device that includes a driving motor and a drive shaft which is an intermediate member rotationally driven by the driving motor, the driving device being configured to transmit a rotary driving force from the driving motor to swing the ultrasound transmitting/receiving unit; and
a detecting device that includes a detecting member and is configured to detect an origin position serving as a reference in control of a swing of the ultrasound transmitting/receiving unit, wherein
the driving device is configured to transmit the rotary driving force to the intermediate member,
the drive shaft is disposed such that one end portion of the drive shaft enters an interior of the housing and transmits the rotary driving force to the interior of the housing,
the detecting device being configured to extract a rotation of the intermediate member outside of the housing, a reduction element being configured to decelerate the rotation of the intermediate member and transmit the rotation which is decelerated to the detecting member of the detecting device in a route different from the driving device, and the detecting member is rotated at a first rotation speed lower than a second rotation speed of the drive shaft, and the detecting device being configured to detect the rotation of the detecting member by a sensor to detect an origin position.

US Pat. No. 10,291,235

OVEN CONTROLLED CRYSTAL OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. An oven controlled crystal oscillator, comprising:a crystal oscillator that includes a crystal resonator and an oscillator circuit;
a temperature control circuit including:
a heater resistor that has one end to which a supply voltage connects to generate a heat;
a thermistor configured to output a voltage to one end, the voltage corresponding to a temperature;
a first resistor that has one end to which the supply voltage is supplied and another end connected to the one end of the thermistor;
a second resistor that has one end to which the supply voltage is supplied;
a third resistor that has one end connected to another end of the second resistor and another end of the third resistor is grounded;
a differential amplifier that has one input terminal and another input terminal, a voltage between the another end of the first resistor and the one end of the thermistor being input to the one input terminal, a voltage between another end of the second resistor and the one end of the third resistor being input to the another input terminal, the differential amplifier amplifying a difference between the voltage input to the one input terminal and the voltage input to the another input terminal so as to output as a control voltage;
a thermosensor disposed in parallel to the first resistor, the thermosensor having one end to which the supply voltage is supplied; and
a fourth resistor that has one end connected to another end of the thermosensor and another end of the fourth resistor is grounded; and
a control integrated circuit that includes a digital variable resistor and a controller, the digital variable resistor being connected to the thermosensor in parallel, the controller adjusting a resistance value of the digital variable resistor based on a digital control signal input from outside.

US Pat. No. 10,250,224

PIEZOELECTRIC VIBRATING PIECE AND PIEZOELECTRIC DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A piezoelectric vibrating piece, comprising:a vibrating piece body, including a vibrator; and
at least a pair of excitation electrodes, being formed on a front surface and a back surface of the vibrator, respectively,
wherein the vibrating piece body is a doubly rotated quartz-crystal vibrating piece cut out parallel to an X?-Z? surface, the X?-Z? surface being rotated around a Z-axis of a crystallographic axis of a crystal and further rotated around an X?-axis; and
the pair of excitation electrodes are collocated in a Z??-axis direction determined by an X??-axis, the X??-axis being defined by counterclockwise rotation from a +X?-axis direction around a Y?-axis by 260° to 300°, the pair of excitation electrodes being disposed inclined with respect to an Y?-axis direction.

US Pat. No. 10,153,776

FREQUENCY SYNTHESIZER

NIHON DEMPA KOGYO CO., LT...

1. A frequency synthesizer, comprising:a PLL circuit that includes a voltage control oscillator, a variable frequency divider, a phase comparator, and a loop filter, the variable frequency divider dividing a frequency signal output from the voltage control oscillator, the phase comparator extracting a phase difference between a phase of the divided frequency signal and a phase of a reference frequency signal, the loop filter supplying the voltage control oscillator with a control voltage corresponding to the phase difference;
a DDS configured to operate based on a clock signal to generate the reference frequency signal having a reference frequency, the reference frequency corresponding to a value obtained by dividing a set value of an output frequency of the frequency signal by a dividing number, the frequency signal being output from the voltage control oscillator, the dividing number being set in the variable frequency divider;
a clock signal supply unit configured to supply the clock signal to the DDS from a plurality of preliminarily prepared clock frequencies, the clock signal corresponding to a selected clock frequency;
a storage unit storing the clock frequency, the reference frequency, and a minimum dividing number in association with one another, the reference frequency is preliminarily obtained such that a frequency of a spurious component does not exist in a predetermined frequency range and the dividing number of the variable frequency divider is minimum, the spurious component being included in a used frequency band of the DDS while the DDS is operated with the clock signal having the clock frequency selected from the plurality of the clock frequencies so as to generate the reference frequency signal having the reference frequency from the DDS, and
a setting unit configured to select a combination of the clock frequency, the reference frequency, and the minimum dividing number corresponding to the set value of the output frequency so as to set the clock signal supply unit, the DDS, and the variable frequency divider, wherein
the storage unit stores the frequency of the spurious component generated due to the clock frequencies different from one another in association with the clock signal having the clock frequency where an absolute value of a difference between an upper/lower limit value of the frequency range and the frequency of an adjacent spurious component closest to the frequency range becomes maximum, the reference frequency, and the minimum dividing number while the frequency signal with the reference frequency associated with the minimum dividing number is generated by the DDS, and when the clock signal supply unit is prepared for supplying the clock signals such that the frequency of the spurious component does not exist within the predetermined frequency range and the clock frequencies are different from one another.

US Pat. No. 10,483,983

CLOCK GENERATING CIRCUIT AND SIGNAL PROCESSING DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A clock generating circuit, comprising:a dividing unit that divides a reference clock to generate a divided clock, the divided clock having a frequency of 1/N times of a frequency of the reference clock, where N is an integer of two or more; and
a distribution unit that distributes the reference clock to a first route and a second route, the first route including an output terminal that outputs a clock with a frequency identical to the frequency of the reference clock, the second route including the dividing unit,
wherein the dividing unit comprises:
one or more amplifiers;
one or more dividing circuits; and
a correction circuit, disposed between the amplifier and the dividing circuit, the correction circuit corrects a level of an input clock input to the dividing circuit.

US Pat. No. 10,476,472

QUARTZ CRYSTAL DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A quartz crystal device, comprising:a quartz-crystal vibrating piece;
a container that houses the quartz-crystal vibrating piece; and
a pedestal, located between the quartz-crystal vibrating piece and the container for connecting and fixing the quartz-crystal vibrating piece to the container, the pedestal being configured with a crystal, wherein
the pedestal is fixed to the container at three places of a first fixation point, a second fixation point, and a third fixation point in a plan view,
the first fixation point, the second fixation point, and the third fixation point are configured so as to become positions where an inner center, an outer center, or a gravity center of a triangle formed by connection of the first, second and third fixation points and a gravity center of the pedestal match.

US Pat. No. 10,463,342

ULTRASONIC TRANSDUCER

NIHON DEMPA KOGYO CO., LT...

1. An ultrasonic device, comprising:a transducer main body;
a power source, having an output shaft;
a coupling, swingably and loosely fitted between the transducer main body and the output shaft of the power source that swings the transducer main body; and
a flywheel, swingably and loosely fitted to the output shaft of the power source via an oil layer, and is held by a washer,
wherein the coupling comprises:
a first hub, disposed at a side of the transducer main body;
a second hub, disposed at a side of the power source, and the first hub and the second hub are disposed opposed to one another;
a buffer, disposed between the first hub and the second hub, wherein the buffer is configured to reduce generation of vibration and noise from the transducer main body; and
a compression coil spring, disposed between the buffer and the second hub, wherein the compression coil spring axially biases the first hub and the second hub.

US Pat. No. 10,447,205

OSCILLATION DEVICE AND METHOD FOR MANUFACTURING THE OSCILLATION DEVICE

NIHON DEMPA KOGYO CO., LT...

1. An oscillation device that uses a piezoelectric resonator to obtain an oscillation output based on a frequency setting value, the oscillation device comprising:a storage unit, storing a prediction data generated based on an acquired result of a correspondence relationship between an elapsed time and an oscillation frequency during a time period from after a start of oscillation of the piezoelectric resonator up to a preliminary set elapsed time, the prediction data corresponding to a correspondence relationship between the oscillation frequency and an accumulated elapsed time of the oscillation after the start of the oscillation, and the accumulated elapsed time including a dine after the preliminary set elapsed time;
a time measurement unit, configured to measure the accumulated elapsed time of the oscillation after the start of the oscillation of the piezoelectric resonator;
a correction value operator, configured to obtain a correction value of the frequency setting value based on the accumulated elapsed time of the oscillation measured in the time measurement unit and the prediction data stored in the storage unit; and
an addition unit, configured to obtain a corrected frequency setting value by adding the correction value obtained in the correction value operator to the frequency setting value.

US Pat. No. 10,425,059

CRYSTAL RESONATOR

NIHON DEMPA KOGYO CO., LT...

1. A crystal resonator, comprising:a crystal element that has a pair of principal surfaces parallel to an X?-axis and a Z?-axis, the X?-axis being an axis of rotating an X-axis as a crystallographic axis of a crystal in a range of 15 degrees to 25 degrees around a Z-axis as a crystallographic axis of the crystal, the Z?-axis being an axis of rotating the Z-axis in a range of 33 degrees to 35 degrees around the X?-axis; and
excitation electrodes, formed on the respective principal surfaces of the crystal element, wherein
mesa portions with an elliptical shape or inverted mesa portions with an elliptical shape are formed on the respective principal surfaces, the mesa portions projecting from outer peripheries of the principal surfaces, the inverted mesa portions being depressed from outer peripheries of the principal surfaces.

US Pat. No. 10,401,898

SIGNAL PROCESSING CIRCUIT

NIHON DEMPA KOGYO CO., LT...

1. A signal processing circuit comprising:a clock generating circuit configured to output a first clock;
a divider circuit configured to divide the first clock to output a second clock, the second clock having a frequency lower than a frequency of the first clock;
a converter configured to convert an input signal into a digital signal based on a first clock output from the clock generating circuit and a second clock output from the divider circuit; and
an amplifier disposed between the clock generating circuit and the divider circuit, the amplifier having a phase variation property opposite to a phase variation property of the divider circuit, the phase variation property of the divider circuit indicating a relationship between a phase variation amount of an output signal with respect to an input signal in the divider circuit and an ambient temperature of the divider circuit.

US Pat. No. 10,333,467

CRYSTAL OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. A crystal oscillator, comprising:a surface mount type crystal unit that includes a ceramic container, the surface mount type crystal unit having a rectangular planar shape; and
a mounting substrate that includes a ceramic substrate on which an electronic component is mounted, the mounting substrate having a rectangular planar shape, wherein
the crystal oscillator has a structure where the surface mount type crystal unit and the mounting substrate are laminated, and both terminals of the surface mount type crystal unit and the mounting substrate are connected with a bonding material, and
the mounting substrate and the surface mount type crystal unit are connected in a positional relationship where a long side of the mounting substrate and a long side of the surface mount type crystal unit are orthogonal;
wherein a length of a short side of the mounting substrate and a length of the long side of the surface mount type crystal unit are identical or approximately identical.

US Pat. No. 10,333,489

CRYSTAL UNIT

NIHON DEMPA KOGYO CO., LT...

1. A crystal unit, comprising:an AT-cut crystal element, having a planar shape which is approximately a rectangular shape; and
a container, secured to the AT-cut crystal element at a side of a first side as one side of the rectangular shape by a securing member,
wherein the AT-cut crystal element includes:
a first inclined portion, inclined such that the AT-cut crystal element decreases in thickness from a proximity of the first side to the first side;
second inclined portions, disposed on respective both ends of the first side, the second inclined portions being formed integrally with the first inclined portion, the second inclined portions being inclined gentler than the first inclined portion; and
a first secured portion and a second secured portion, formed integrally with the second inclined portions, and the first secured portion and the second secured portion each projecting out in a projecting direction which is from the first side to an outside the AT-cut crystal element to be used for securing with the securing member.

US Pat. No. 10,302,623

FLUID SENSING VIBRATION SENSOR

NIHON DEMPA KOGYO CO., LT...

1. A sensing sensor comprising:a wiring board having one surface side on which a first depressed portion is formed, wherein the first depressed portion is in the one surface side of the wiring board;
a piezoelectric resonator including a piezoelectric piece on which an excitation electrode electrically connected to a conductive path of the wiring board is disposed, the piezoelectric resonator having one surface side on which an adsorbing film that adsorbs a sensing object in a sample solution is formed, the piezoelectric resonator being secured to the wiring board in a state where a vibrating region is opposed to the first depressed portion to cover the first depressed portion;
a channel forming member disposed to cover a region in the one side of the wiring board including the piezoelectric resonator, the channel forming member forming a channel between the piezoelectric resonator and the channel forming member, the channel communicating with an injection port of the sample solution; and
a pressing member that presses a surface on an opposite side of the wiring board in the channel forming member to press the channel forming member against the wiring board, wherein
the sensing sensor is configured to form a clearance between the pressing member and a second depressed portion on an opposite side of the channel in the channel forming member to prevent the channel from being collapsed when the pressing member presses the channel forming member.

US Pat. No. 10,250,268

PLL CIRCUIT

NIHON DEMPA KOGYO CO., LT...

1. A PLL circuit, comprising:a voltage control oscillator that outputs an oscillation signal based on a control voltage;
a frequency difference detector that detects a frequency difference between a reference signal and the oscillation signal, the frequency difference detector outputting a first control value based on the frequency difference which is detected;
a phase difference detector that detects a phase difference between the reference signal and the oscillation signal, the phase difference detector outputting a second control value based on the phase difference which is detected; and
an outputter that outputs the control voltage, based on the first control value and the second control value, to the voltage control oscillator while the second control value does not exceed a predetermined range, the outputter outputting the control voltage, based on a corrected value obtained by correcting the first control value and the second control value, to the voltage control oscillator while the second control value exceeds a predetermined range.

US Pat. No. 10,320,397

OSCILLATOR

NIHON DEMPA KOGYO CO., LT...

1. An oscillator including an oscillator circuit connected to a plurality of crystal resonators, and a plurality of heater circuits for stabilizing a temperature of an atmosphere in which the crystal resonators are placed, the oscillator comprising:a first substrate, supported in a inner most container with a first supporting member from an inner wall of the inner most container;
a temperature detector, configured to detect a temperature inside the innermost container, and the heater circuits is controlled based on a temperature detection value of the temperature detector, and the crystal resonators, the oscillator circuit, the temperature detector and the heater circuits being each disposed on the first substrate and inside the inner most container;
a outer most container, housing the inner most container in an internal space of the outer most container, the outer most container supporting the inner most container from an inner wall of the outer most container via a supporting portion; and
a voltage stabilizer circuit, disposed apart from the inner most container in the outer most container, the voltage stabilizer circuit stabilizing a supply voltage supplied to the heater circuits.

US Pat. No. 10,277,197

PIEZOELECTRIC VIBRATING PIECE AND PIEZOELECTRIC DEVICE

NIHON DEMPA KOGYO CO., LT...

1. A piezoelectric vibrating piece, comprising:a vibrating piece body that includes a vibrator; and
at least one pair of excitation electrodes that are formed on a front surface and a back surface of the vibrator, wherein
the vibrating piece body is a twice rotated quartz-crystal vibrating piece that is cut out in parallel to an X?Z?-surface, the X?Z?-surface being rotated about a Z-axis of a crystallographic axis of a crystal and further rotated about an X?-axis;
the pair of excitation electrodes are arranged in a Z??-axis direction determined by an X??-axis and obliquely disposed with respect to a Y?-axis direction, the X??-axis being rotated by 260° to 300° counterclockwise about a Y?-axis using a +X?-axis direction as a reference,
the pair of excitation electrodes are formed to have respective semicircle shapes including straight line portions extending in an X??-axis direction and to be disposed in a state where the straight line portions facing or overlapping with one another when viewed from the Y?-axis direction; and
the straight line portion of the excitation electrode includes an inclined portion that gradually decreases in thickness toward an end portion of the excitation electrode.

US Pat. No. 10,278,293

ELECTRONIC DEVICE

NIHON DEMPA KOGYO CO., LT...

1. An electronic device, comprising:a first board;
a second board comprising through holes; and
support pillars that hold the first board and the second board mutually separated, wherein
the support pillars extend through the through holes,
the first board has a first surface on which an electronic component is mounted, and
the first board has a second surface including depressed portions into which the support pillars that extend from the second board are inserted,
each of the depressed portions has a configuration of a non-through hole that does not pass through the first board, and
the depressed portion has a tapered surface that inclines toward a center portion of the depressed portion and a bottom surface located at the center portion of the depressed portion that is substantially parallel with respect to a plane parallel to the first surface,
wherein the bottom surface is larger than an end of the support pillar to be inserted into the depressed portion when view from a direction perpendicular to the bottom surface.

US Pat. No. 10,263,597

CRYSTAL UNIT

NIHON DEMPA KOGYO CO., LT...

1. A crystal unit, comprising:an AT-cut crystal element, having a planar shape which is approximately a rectangular shape,
excitation electrodes, disposed on front and back of principal surfaces of the AT-cut crystal element; and
extraction electrodes, extended from the excitation electrodes to a side of one side of the AT-cut crystal element via a side surface of the AT-cut crystal element, wherein
assuming that an extraction angle of the extraction electrode from the principal surface to the side surface is defined as an angle ? with respect to an X-axis of a crystallographic axis of a crystal of the AT-cut crystal element, the angle ? is equal to or greater than 59 degrees and equal to or less than 87 degrees.