Patent ID: 9602748
Date: 2017-03-21
CPC Classifications: H01L,H04N

Claim:
1. An imaging device comprising; a first substrate including a plurality of pixels arranged in columns and rows, the plurality of pixels including a pixel that outputs a pixel signal; and a second substrate bonded to the first substrate, the second substrate including a first comparator comprising a first differential transistor and a second differential transistor, wherein the first differential transistor includes a first transistor and a second transistor, a gate of the first transistor and a gate of the second transistor are configured to receive the pixel signal, the second differential transistor includes a third transistor and a fourth transistor, a gate of the third transistor and a gate of the fourth transistor are configured to receive a reference signal, and the first transistor, the second transistor, the third transistor and the fourth transistor are arranged along a first column direction within a first column area.