Solid-state imaging device comprising an analog to digital converter with column comparison circuits, column counter circuits, first and second inverters, and buffers

Abstract

A solid-state imaging device includes: a column comparison circuit which compares a pixel signal with ramp waves and detects a timing at which the pixel signal and the ramp waves match; a counter circuit which is disposed for each of the pixel columns and measures the timing in the column comparison circuit by being supplied with a clock signal; and M first inverters which are equidistantly connected in series, wherein the counter circuit belongs to one of M groups corresponding to each of the M first inverters disposed in the upper clock stage, the odd-numbered group has second inverters disposed between the output terminal of the first inverter corresponding to the group and the counter circuit of the group, and the even-numbered group has buffers disposed between the output terminal of the first inverter corresponding to the group and the counter circuit of the group.