US 12,143,738 B2
Photoelectric conversion device and electronic device
Hideo Kobayashi, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 9, 2022, as Appl. No. 17/690,229.
Claims priority of application No. 2021-045159 (JP), filed on Mar. 18, 2021.
Prior Publication US 2022/0303484 A1, Sep. 22, 2022
Int. Cl. H04N 25/75 (2023.01); H01L 27/146 (2006.01)
CPC H04N 25/75 (2023.01) [H01L 27/14603 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A photoelectric conversion device, comprising:
a pixel that generates a signal via photoelectric conversion, wherein from the pixel, a reset signal and a data signal are read out; and
a determination circuit that determines an amplitude of a signal read out from the pixel to a vertical signal line,
wherein the determination circuit performs a first determination on the data signal while the pixel is being selected for reading out a signal and performs a second determination on the reset signal,
wherein the determination circuit is driven by a current source connected to the vertical signal line of the pixel, and
wherein the determination circuit includes a holding circuit that holds an electric potential of a reset signal read out to the vertical signal line and determines an amplitude of the signal using a reference value from which an electric potential of the reset signal held by the holding circuit has been subtracted.