Imaging device and camera system that controls an operation current of a comparator during analog to digital conversion of a second pixel based on the digital signal of a previous pixel

摘要

An imaging device includes: pixels arranged in m rows by n columns; a comparator that generates a first output signal indicating a result of comparison between a first pixel signal outputted from each pixel located in an a^th column among the pixels and a reference signal; a first counter that generates a first digital signal by counting a period from start of a first counting period to inversion of the first output signal; and a first control circuit that controls, in accordance with a magnitude correlation between the first digital signal obtained from a first pixel located at the a^th column and a b^th row and a threshold, an operation current of the comparator in the first counting period of a second pixel located at the a^th column and a c^th row different from the b^th row.