Solid-state imaging apparatus and method of driving the same

A imaging device comprising:

• a photoelectric converter that generates signal charge;
• a charge storage region that stores the signal charge;
• a first transistor that has a gate coupled to the charge storage region and reads out the signal charge;
• a second transistor that has a source and a drain, an output of the first transistor being fed back to one of the source and the drain and being supplied to the charge storage region from the other of the source and the drain;
• and
• voltage supply circuitry that supplies voltages varying with time, wherein
• a reset operation for discharging the signal charge stored in the charge storage region includes a first reset operation and a second reset operation after the first reset operation,
• in the first reset operation, the second transistor changes from an OFF state to an ON state and then changes to an OFF state, and
• in the second reset operation, the voltage supply circuitry supplies the voltages to the one of the source and the drain of the second transistor so that the second transistor gradually changes from an OFF state to an ON state.

A imaging device comprising:

• a photoelectric converter that generates signal charge;
• a charge storage region that stores the signal charge;
• a first transistor that has a gate coupled to the charge storage region and reads out the signal charge;
• a second transistor that has a source and a drain, an input to one of the source and the drain being supplied to the charge storage region from the other of the source and the drain;
• a feedback amplifier that feeds back an output of the first transistor in a negative feedback manner to the one of the source and the drain of the second transistor, the feedback amplifier having two input terminals, the output of the first transistor being input to a first input terminal, a reference voltage being input to a second input terminal;
• and
• voltage supply circuitry that supplies voltages varying with time, wherein
• a reset operation for discharging the signal charge stored in the charge storage region includes a first reset operation and a second reset operation after the first reset operation,
• in the first reset operation, the second transistor changes from an OFF state to an ON state and then changes again to an OFF state, and
• in the second reset operation, the voltage supply circuitry supplies the voltages to the second input terminal of the feedback amplifier so that the second transistor gradually changes from an OFF state to an ON state.