Patent ID: 8319675

Claim:
An analog-to-digital converter comprising: a digital-to-analog converter that outputs a reference analog signal according to a multibit digital signal; a first comparator that compares an input analog signal with the reference analog signal; a second comparator that compares an input analog signal with the reference analog signal; a selection circuit that selects one of comparison results of the first comparator and the second comparator; and a control circuit that sequentially varies the multibit digital signal based on the selected comparison result when sequentially determining each bit from a most significant bit to a least significant bit so that the reference analog signal becomes closer to the input analog signal, wherein the control circuit controls the selection circuit to select comparison results of the first comparator until an intermediate bit between the most significant bit and the least significant bit is determined and select comparison results of the second comparator after the intermediate bit is determined, and the bit values of the multibit digital signal are varied in accordance with a non-binary algorithm.