Imaging device

An imaging device, comprising:

• a plurality of pixels each having a light receiving region configured to convert incident light or radiation into an electrical signal;
• a power supply line configured to supply a power supply voltage;
• a plurality of drive power supplies configured to convert the power supply voltage into a driving direct-current voltage and connected in parallel to each other with respect to the power supply line;
• and
• a driving circuit configured to be supplied with the driving direct-current voltage from each of the plurality of drive power supplies and read out the electrical signal from the light receiving region of each of the plurality of pixels,
• wherein a magnitude of the driving direct-current voltage differs for each of the plurality of drive power supplies,
• at least one drive power supply of the plurality of drive power supplies includes:
• a voltage converter configured to convert the power supply voltage into the driving direct-current voltage;
• and
• a discharge circuit,
• the discharge circuit includes:
• a capacitive element configured to be charged by the power supply voltage or another voltage whose voltage value is converted from the power supply voltage;
• and
• a second switch element configured to be driven by a voltage across the capacitive element after a stopping operation of the voltage converter is started and having one end connected to a first node between the voltage converter and the driving circuit and another end connected to a constant potential line.