Imaging device and electronic apparatus comprising imaging device

An imaging device comprising:

• a plurality of pixels that are exposed during a same period;
• an AD converter that digitizes a pixel signal that is output from each of the plurality of pixels,
• wherein each of the plurality of pixels includes
• a photoelectric conversion circuit that photoelectrically converts incident light,
• a first source follower circuit that amplifies an output signal of the photoelectric conversion circuit,
• a signal holding circuit that holds an output signal of the first source follower circuit, and
• a second source follower circuit that amplifies a signal read out from the signal holding circuit and outputs the signal as the pixel signal, and wherein
• a ramp signal including a slope portion in which a voltage level changes like a ramp is supplied to the signal holding circuit, and
• the ramp signal includes the slope portion and an offset portion in which the voltage level changes like a rectangular wave.

An electronic apparatus comprising:

• an imaging device that includes:
• a plurality of pixels that are exposed during a same period;
• an AD converter that digitizes a pixel signal that is output from each of the plurality of pixels,
• wherein each of the plurality of pixels includes
• a photoelectric conversion circuit that photoelectrically converts incident light,
• a first source follower circuit that amplifies an output signal of the photoelectric conversion circuit,
• a signal holding circuit that holds an output signal of the first source follower circuit, and
• a second source follower circuit that amplifies a signal read out from the signal holding circuit and outputs the signal as the pixel signal;
• and
• a signal generation circuit that generates a ramp signal including a slope portion in which a voltage level changes like a ramp, and that supplies the ramp signal to the signal holding circuit, wherein
• the signal holding circuit includes a first capacitive element that holds a first signal that has reset the photoelectric conversion circuit, and a second capacitive element that holds a second signal generated by photoelectric conversion of the photoelectric conversion circuit, the first capacitive element and the second capacitive element being connected in parallel between an output of the first source follower circuit and an input of the second source follower circuit.