A high dynamic range CMOS image sensor with novel pixel architecture is presented,which adjusts the single pixel integration time to adapt to different local light conditions.So the dynamic range is effectively enhanced.A novel pixel-level voltage comparator with low-latency,low power consumption,simple structure and a time-voltage encoding circuit are designed based on reversible counter.The high dynamic range unit pixel circuit is simulated based on 0.6 μm DPDM standard digital CMOS process pa...