Sigma-delta modulator for forming digital output signal, has analog/digital convertor with input offset voltage fluctuation that is larger than voltage difference of quantization stages of internal analog/digital convertor of modulator

摘要

The modulator (200) has an analog/digital convertor (203) with input offset voltage fluctuation. The fluctuation is larger than a voltage difference of quantization stages of an internal analog/digital convertor of the sigma delta modulator, where the stages are directly adjacent to each other. The analog/digital convertor has a cascade of comparators. The modulator is arranged as an integrated circuit.