Patent ID: 6809674
Filing Date: 2004-10-26
Classification: H03M

Abstract:
A circuit comprising:a comparator adapted to receive a first and a second input signal and provide a comparator output signal; a first register adapted to store at least one threshold value and at least one successive approximation register value; a digital-to-analog converter adapted to provide the second input signal to the comparator, where the second input signal is based on one of the threshold values or one of the successive approximation register values from the first register; a first multiplexer adapted to select from one or more input signals to provide a first output signal; a sample and hold circuit adapted to store a value of the first output signal and provide a second output signal; and a second multiplexer adapted to select between the first and second output signal to provide the first input signal to the comparator; and a second register adapted to store the comparator output signal from the comparator, wherein the circuit is adapted to provide threshold detection or successive approximation analog-to-digital conversion of the first input signal.