A novel double sampled chopper stabilised integrator for switched capacitor /spl Sigma//spl Delta/ modulators

摘要

A fully floating double sampled chopper stabilised integrator is proposed, with redundant switches removed. The fully floating arrangement moving sums the input to the switched capacitor integrator. The /spl Sigma//spl Delta/ modulator loop is modified to counteract the moving sum effect on the feedback signal such that the noise shaping performance remains unchanged.