  In this paper, we propose an analog pixel differencing circuit for
differentiating pixels between frames directly from CMOS pixels. The analog
information processing at sensor is a topic of growing appeal to develop edge
AI devices. The proposed circuit is integrated into a pixel-parallel and
pixel-column architectures. The proposed system is design using TSMC $180nm$
CMOS technology. The power dissipation of the proposed circuit is $96.64mW$,
and on-chip ares is $531.66 \mu m^2$. The architectures are tested for moving
object detection application.
