Image sensor and imaging apparatus

An imaging apparatus, comprising:

• an electric charge holding unit configured to hold an electric charge generated in accordance with light emitted for each pixel;
• an image signal output unit configured to be controlled in accordance with a first control signal indicating either a voltage state of an on voltage that causes a conductive state and an off voltage having a polarity different from that of the on voltage, and output an analog image signal corresponding to the held electric charge in the conductive state;
• a reset unit configured to be controlled in accordance with a second control signal indicating either the voltage state of the on voltage and the off voltage, reset the electric charge holding unit in the conductive state, transmit a fluctuation in the off voltage to the electric charge holding unit, and fluctuate the analog image signal;
• a reference signal generation unit configured to generate a reference signal being a signal serving as a reference used when conversion from an analog image signal output from the image signal output unit, into a digital image signal is performed;
• a reference signal correction unit configured to correct the generated reference signal in accordance with the fluctuation in the off voltage;
• an analog-to-digital conversion unit configured to perform the conversion based on the corrected reference signal;
• and
• a processing circuit configured to process a digital image signal on which the conversion has been performed.