US Patent No. 10,365,775

METHOD AND SYSTEM FOR SENSING IMPEDANCE CHANGE IN THE LOCAL SPACE BETWEEN ELECTRODES


Patent No. 10,365,775
Issue Date July 30, 2019
Title Method And System For Sensing Impedance Change In The Local Space Between Electrodes
Inventorship Attma Sharma, Chandler, AZ (US)
Assignee MICROCHIP TECHNOLOGY INCORPORATED, Chandler, AZ (US)

Claim of US Patent No. 10,365,775

1. A capacitive sensor device comprising a transmitter electrode coupled with an output of a driver and a receiver stage having an output coupled with an input of the driver, wherein the receiver stage, comprises:a receiver electrode; and
a loop filter configured to:
issue a capacitance measurement upon activation of electrical oscillation of a feedback circuit formed by the transmitter electrode, the driver and the receiver stage, wherein oscillation depends on a capacitive coupling between the transmitter electrode and the receiver electrode.