Photoelectric conversion apparatus

A photoelectric conversion apparatus comprising:

• a pixel array having a plurality of pixels each including a photodiode, a floating diffusion, and a transfer transistor configured to transfer a charge from the photodiode;
• a signal line to which pixel signals are output from the pixels;
• a processing circuit configured to process the pixel signals in the signal line;
• a switch configured to control conduction between the signal line and an input node of the processing circuit;
• and
• a control unit,
• wherein the control unit is configured to perform a first transition in which, after resetting of the processing circuit, the switch is transitioned to an OFF state and then, during a period after the floating diffusion is reset during which the pixel signals are read out of the pixels into the signal line, the switch is transitioned at least from the OFF state to an ON state,
• wherein the control unit is configured to keep the switch in the OFF state during a period during which the transfer transistor is performing the transfer, and
• wherein the control unit is configured to perform a second transition in which, after the transfer, the switch is transitioned from the OFF state to the ON state.