dither
Increasing ADC resolution by adding dither to DC signals
An EDN Design Idea (DI) presented a discussion of how to increase the resolution of an ADC by adding a non-deterministic, zero-mean, Gaussian noise dither waveform to a signal to be converted; then, oversampling the sums, and low-pass filtering (thereby averaging) the ADC conversions. (As noted, a filter that optimally removes out-of-band high-frequency dither noise is generally…