Method and system to enhance differential dynamic range and signal/noise in CMOS range finding systems using differential sensors

摘要: Dynamic range of a differential pixel is enhanced by injecting, synchronously or asynchronously, compensating offset (Δ COMP ) into signal capacitor whenever magnitude the across exceeds predetermined value. Positive and negative magnitudes Δ need not be equal. The number (N) offsets made counted. Effective voltage V(t)=Vo±N·Δ , where Vo voltage. In other embodiments in sequence compensations can differ, sum total recorded. Differential signal/noise ratio increased dynamically maximizing operational amplifier gain A G for each pixel.