Effects of non-ideal Hadamard modulators on the performance of /spl Pi//spl Delta//spl Sigma/ ADC

摘要

A non-ideal Hadamard modulator in the front-end of /spl Pi//spl Delta//spl Sigma/ ADC can be modelled as an ideal Hadamard modulator with gain error in parallel with an offset error. The effects of non-ideal Hadamard modulators can be partially removed by using chopper stabilisation and adaptive channel gain equalisation.