Comparator, AD converter, solid-state imaging device, electronic apparatus, and method of controlling comparator

Alight detecting device, comprising:

• a first substrate;
• a second substrate laminated to the first substrate;
• and
• a third substrate laminated to the second substrate, wherein:
• the first substrate includes:
• a pixel circuit having a photodiode, and
• a first part of a comparator coupled to the pixel circuit,
• the second substrate includes a second part of the comparator coupled to the first part of the comparator, and
• the third substrate includes a latch storage unit coupled to the second part of the comparator.

An electric apparatus, comprising:

• a digital signal processor;
• and
• a light detecting device that output a pixel signal to the digital signal processor, the light detecting device comprising:
• a first substrate;
• a second substrate laminated to the first substrate;
• and
• a third substrate laminated to the second substrate,
• wherein:
• the first substrate includes:
• a pixel circuit having a photodiode, and
• a first part of a differential amplification circuit coupled to the pixel circuit,
• the second substrate includes a second part of the differential amplification circuit coupled to the first part of the differential amplification circuit, and
• the third substrate includes a latch storage unit coupled to the second part of the differential amplification circuit.