Image sensor and electronic device

An electronic device comprising an image sensor, the image sensor including:

• a pixel array section in which a plurality of pixels including photoelectric conversion units is disposed;
• and a comparator that compares an analog pixel signal output from the pixels to a predetermined reference signal, and outputs a comparison result according to a signal level of the pixel signal, wherein
• the comparator includes
• differential pair transistors,
• a first load transistor connected in series with a first transistor of the differential pair, and
• a second load transistor connected in series with a second transistor of the differential pair,
• the first transistor of the differential pair accepts a signal obtained by combining the pixel signal and the predetermined reference signal as a gate input,
• the second transistor of the differential pair accepts a predetermined voltage as a gate input, and
• a capacitance unit is connected between a common connection node of the first transistor of the differential pair and the first load transistor, and a node of the predetermined voltage.

An image sensor comprising:

• a pixel array section in which a plurality of pixels including photoelectric conversion units is disposed;
• and a comparator that compares an analog pixel signal output from the pixels to a predetermined reference signal, and outputs a comparison result according to a signal level of the pixel signal, wherein
• the comparator includes a first amplification unit and a second amplification unit connected in cascade,
• the first amplification unit includes
• differential pair transistors,
• a first load transistor connected in series with a first transistor of the differential pair, and
• a second load transistor connected in series with a second transistor of the differential pair,
• the first transistor of the differential pair accepts a signal obtained by combining the pixel signal and the predetermined reference signal as a gate input,
• the second transistor of the differential pair accepts a predetermined voltage as a gate input, and
• the second amplification unit includes
• a first capacitance unit connected between an output node and a node of the predetermined voltage.

An electronic device comprising an image sensor, the image sensor including:

• a pixel array section in which a plurality of pixels including photoelectric conversion units is disposed;
• and a comparator that compares an analog pixel signal output from the pixels to a predetermined reference signal, and outputs a comparison result according to a signal level of the pixel signal, wherein
• the comparator includes a first amplification unit and a second amplification unit connected in cascade,
• the first amplification unit includes
• differential pair transistors,
• a first load transistor connected in series with a first transistor of the differential pair, and
• a second load transistor connected in series with a second transistor of the differential pair,
• the first transistor of the differential pair accepts a signal obtained by combining the pixel signal and the predetermined reference signal as a gate input,
• the second transistor of the differential pair accepts a predetermined voltage as a gate input, and
• the second amplification unit includes
• a capacitance unit connected between an output node and a node of the predetermined voltage.