Motion detection circuit and motion detection method applied to cis

Abstract

The present invention discloses a motion detection circuit applied to CIS and a motion detection method. Through the current frame pixel signal sampling branch and the previous frame pixel signal sampling branch, the sampling of the current frame and the previous frame pixel signal is respectively controlled, and the previous frame pixel signal is transmitted to the first end of the first capacitor and the second capacitor connected in series, and then the first error reference signal and the second error reference signal related to the pixel signal of the previous frame, which are respectively output by the second ends of the first capacitor and the second capacitor that are not connected, are transmitted to the first comparator branch and the second comparator branch of the comparator branch respectively, by judging the high and low-state of the comparison signals of the current frame pixel signal and the first error reference signal, and the current frame pixel signal and the second error reference signal respectively output by the first comparator branch and the second comparator branch, so as to determine whether an image point reflected by the pixel points of the pixels connected with the motion detection circuit has moved or not.