Patent ID: 8441384

Claim:
A switched-capacitor circuit comprising: a comparator having first and second input terminals and an output; a first circuit connected to the first input terminal, and including first, second, and third switches and a first capacitor, wherein the first switch is connected between a first node of the first capacitor and a common voltage, the first node of the first capacitor also being connected to the first input, the second switch is connected between a second node of the first capacitor and a reference voltage, and the third switch is connected between the second node of the first capacitor and a first input of the switched-capacitor circuit; and a second circuit connected to the second input terminal, and including fourth, fifth, and sixth switches and a second capacitor, wherein the fourth switch is connected between a first node of the second capacitor and the common voltage, the first node of the second capacitor also being connected to the second input, the fifth switch is connected between a second node of the second capacitor and the common voltage, and the sixth switch is connected between the second node of the second capacitor and a second input of the switched-capacitor circuit; wherein, the first, second, fourth and fifth switches are controlled by a first set of switching signals.