Patent ID: 8102292

Claim:
A circuit, comprising: an analog-to-digital converter (ADC), comprising: a comparator to receive an input voltage at a first input terminal; logic circuitry coupled to the output of the comparator, wherein the logic circuitry is configured to provide a digital output at a first output terminal of the ADC; and a digital-to-analog converter (DAC) coupled to receive the digital output of the logic circuitry, wherein the DAC is configured to convert the digital output into an analog output, feedback the analog output into a second input terminal of the comparator, and provide the analog output at a second output terminal of the ADC; and a sample and hold circuit coupled to receive the analog output from the second output terminal of the ADC, wherein the sample and hold circuit is configured to sample and hold the analog output as a feedback signal and provide the feedback signal to a first difference circuit.