Photoelectric conversion device

A photoelectric conversion device comprising a plurality of pixels arranged in an array to form a plurality of rows and a plurality of columns,

• wherein each of the plurality of pixels includes:
• a photon detection element that outputs an output signal generated by avalanche multiplication in accordance with incidence of a photon;
• a quench element connected to the photon detection element;
• a waveform shaper that is connected to the photon detection element and generates a detection signal based on the output signal;
• and
• a signal processing circuit that performs signal processing on the detection signal output from the waveform shaper, and
• wherein the signal processing circuit of each of the plurality of pixels includes:
• a counting unit that performs a counting process of counting the detection signal output from the waveform shaper of a corresponding pixel;
• and
• a calculation unit that performs a predetermined calculation process on a count result output from the counting unit.