Analysis of SAR ADC Performance Enhancement utilizing Stochastic Resonance

Stochastic resonance (SR) is a phenomenon where the noise of certain intensity helps to improve signal-to-noise ratio (SNR) nonlinear systems. This brief applies this concept successive approximation register (SAR) analog-to-digital converter (ADC) enhance its performance. To effective number bits SAR ADC, some additional comparisons are repeated after normal binary search. The theoretical analysis performance enhancement based on statistical information provides optimal in terms ADC figure-of-merit (FoM). As scheme allows use high-input-referred-noise but low-power comparator total power consumption can be reduced even with comparisons.