US Patent No. 9,288,415

SOLID-STATE IMAGING APPARATUS AND IMAGING SYSTEM


Patent No. 9,288,415
Issue Date March 15, 2016
Title Solid-state Imaging Apparatus And Imaging System
Inventorship Kazuo Yamazaki, Yokohama (JP)
Tetsuya Itano, Sagamihara (JP)
Hiroki Hiyama, Sagamihara (JP)
Assignee Canon Kabushiki Kaisha, Tokyo (JP)

Claim of US Patent No. 9,288,415

1. A solid-state imaging apparatus comprising:
a pixel section in which a plurality of pixels are arranged in a matrix;
a column signal line configured to output a pixel signal from the pixel section;
a column amplifier circuit configured to output an amplified signal by inverting and amplifying the pixel signal;
a bypass circuit configured to bypass the column amplifier circuit;
an analogue to digital (AD) converter; and
a control unit configured to change an operation mode of the AD converter,
wherein the AD converter includes a ramp signal generation circuit configured to generate a reference signal, a comparator
configured to compare the reference signal and one of the pixel signal and the amplified signal, and a counter configured
to count a time and output a count value corresponding to the time, and

the control unit is configured:
in a first operation mode, to control the AD converter to AD-convert the pixel signal output from the column signal line via
the bypass circuit,

in a second operation mode, to control the AD converter to AD-convert the amplified signal, and
to change one of a slope of a reference signal and a counting procedure of the counter between the first operation mode and
the second operation mode.