Patent ID: 9712184
Date: 2017-07-18
CPC Classifications: H03M

Claim:
1. A sigma-delta modulator comprising: a plurality of filter stages in series with each other, wherein at least one of the plurality of filter stages is configured to provide a filter-output-signal; a plurality of comparators, each comparator configured to provide a comparator output-signal; a filter-output-switching-element configured to selectively couple the filter-output-signal to an input terminal of one of the plurality of comparators; and a plurality of filter-input-switching-elements, each of the plurality of filter-input-switching-elements being associated with a different respective filter stage of the plurality of filter stages, wherein the plurality of filter-input-switching-elements are configured to selectively couple one of the comparator output-signals to an input terminal of its associated one of the plurality of filter stages.