Mismatch-shaping DAC for lowpass and bandpass multi-bit Delta-Sigma modulators

Techniques similar to delta-sigma (/spl Sigma//spl Delta/) modulation can be used to spectrally shape the static mismatch errors of multi-bit delta-sigma converters. Algorithms to shape the mismatch-error for lowpass and bandpass applications are covered. Both simulation and test results show that the signal-to-noise and distortion-ratio (SNDR) of a /spl Sigma//spl Delta/ DAC is improved when mismatch-shaping is used.