US 11,688,755 B2
Photoelectric conversion device, substrate, and equipment comprising a circuit to determine an internal temperature of the photoelectric conversion device based on a current following in a resistive element
Hideo Kobayashi, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 14, 2022, as Appl. No. 17/693,521.
Claims priority of application No. 2021-045157 (JP), filed on Mar. 18, 2021.
Prior Publication US 2022/0302199 A1, Sep. 22, 2022
Int. Cl. H01L 27/146 (2006.01); H03M 1/12 (2006.01); H04N 25/60 (2023.01); H04N 25/75 (2023.01)
CPC H01L 27/14643 (2013.01) [H01L 27/14609 (2013.01); H03M 1/12 (2013.01); H04N 25/60 (2023.01); H04N 25/75 (2023.01)] 16 Claims
OG exemplary drawing
 
1. A photoelectric conversion device comprising:
a light receiving circuit configured to convert light into an electrical signal;
a first hold circuit configured to hold a data signal which represents the electrical signal converted from the light;
a second hold circuit configured to hold a noise signal read out from the light receiving circuit in a reset state;
a first resistive element to which a voltage corresponding to a difference between the data signal held by the first hold circuit and the noise signal held by the second hold circuit is applied;
an analog-to-digital (A/D) converter configured to convert an analog current flowing in the first resistive element into digital data;
a second resistive element; and
a temperature detection circuit configured to generate, based on a current flowing in the second resistive element, an analog output corresponding to an internal temperature of the photoelectric conversion device.