Patent ID: 7696915

Claim:
An analog-to-digital converter (ADC) circuit, comprising: a plurality of comparators, each of the comparators being operative to generate an output indicative of a difference between a first signal representative of an input signal applied to the ADC circuit and a corresponding reference signal; and a controller coupled to the plurality of comparators, the controller being operative to perform at least one of: (i) activating a subset of the plurality of comparators during a given sample period, wherein the subset of the plurality of comparators is directly dependent upon unencoded outputs of a least two of the plurality of comparators during a first set of one or more previous sample periods; and (ii) controlling levels of the corresponding reference signals of at least two of the plurality of comparators, wherein the levels of the corresponding reference signals are directly dependent upon the unencoded outputs of the at least two of the plurality of comparators during the first set of one or more previous sample periods.