US 12,120,447 B2
Photoelectric conversion device, imaging system, moving body, and stackable semiconductor device
Yu Arishima, Yokohama (JP); Masahiro Kobayashi, Tokyo (JP); Koichiro Iwata, Kawasaki (JP); and Fumihiro Inui, Yokohama (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Apr. 30, 2021, as Appl. No. 17/246,435.
Application 17/246,435 is a continuation of application No. 16/551,111, filed on Aug. 26, 2019, granted, now 11,025,848.
Claims priority of application No. 2018-163772 (JP), filed on Aug. 31, 2018; and application No. 2019-111594 (JP), filed on Jun. 14, 2019.
Prior Publication US 2021/0258529 A1, Aug. 19, 2021
Int. Cl. H04N 25/771 (2023.01)
CPC H04N 25/771 (2023.01) 17 Claims
OG exemplary drawing
 
1. A photoelectric conversion device comprising a unit circuit including:
a photoelectric conversion element;
an output transistor including an input node and configured to output a signal based on a charge from the photoelectric conversion element;
a transfer transistor configured to transfer the charge from the photoelectric conversion element to the input node;
a reset transistor configured to set a potential of the input node to a predetermined potential; and
a first transistor including a gate electrode and a plurality of main electrodes, and configured to change a capacitance of the input node, the plurality of main electrodes including a first electrode and a second electrode, the first electrode being connected to the input node without passing through the second electrode, and the second electrode being connected to the transfer transistor through the first electrode,
wherein a first control signal supplied to a gate electrode of the first transistor has at least a first voltage at which the first transistor turns ON, a second voltage at which the first transistor turns OFF, and a third voltage having a value between values of the first and second voltages, and
wherein a second control signal supplied to a gate electrode of the reset transistor has at least a fifth voltage at which the reset transistor turns ON, a sixth voltage at which the reset transistor turns OFF, and a seventh voltage having a value between values of the fifth and sixth voltages.