Patent ID: 7595747
Filing Date: 2009-09-29
Classification: G09G,H03M

Abstract:
1. An integrated circuit, comprising: a first capacitor; an operation amplifier having a first input terminal connected to the first capacitor, a second input terminal, and an output terminal; and a switching circuit having a plurality of switches each being switched in response to a corresponding switching signal from among a plurality of switching signals, wherein the switching circuit transmits a first voltage to a first terminal of the first capacitor, transmits a second voltage to the second input terminal of the operation amplifier, and connects the first input terminal of the operation amplifier to the output terminal of the operation amplifier during a first period; and then transmits a third voltage to the second input terminal of the operation amplifier, separates the first input terminal of the operation amplifier from the output terminal of the operation amplifier, and connects the first terminal of the first capacitor to the output terminal of the operation amplifier during a second period.