Photoelectric conversion apparatus having analog-to-digital conversion based on signal charge, image capturing system, and moving body

A photoelectric conversion apparatus comprising:

• a pixel including a photoelectric conversion portion, a capacitor element, and an output circuit, the output circuit including an input node to receive a signal charge generated in the photoelectric conversion portion and being configured to output a signal based on the signal charge;
• and
• an analog-to-digital conversion circuit configured to perform an analog-to-digital conversion on the signal,
• wherein the capacitor element is electrically connected to the input node via a transistor and forms a part of a capacitance of the input node, and
• wherein conversion resolutions for analog-to-digital conversion to be performed on a first signal output from the output circuit in a case where the capacitor element and the input node are electrically connected and on a second signal output from the output circuit in a case where the capacitor element and the input node are not electrically connected are different.

A photoelectric conversion apparatus comprising:

• a pixel including a photoelectric conversion portion;
• an accumulation portion configured to accumulate a signal charge generated in the photoelectric conversion portion in a location other than the photoelectric conversion portion;
• an analog-to-digital conversion circuit configured to perform an analog-to-digital conversion on a signal based on the signal charge generated in the photoelectric conversion portion;
• and an output circuit,
• wherein the output circuit reads out a first signal based on a first signal charge accumulated in the photoelectric conversion portion during an electric charge accumulation period and a second signal based on a second signal charge accumulated in the accumulation portion during the electric charge accumulation period, and
• wherein conversion resolutions for analog-to-digital conversion to be performed on the first and second signals are different.