Patent ID: 8199038
Filing Date: 2012-06-12
Classification: G06G,H03M

Abstract:
1. An active RC integrator comprising: an amplifier; a first base resistor connected between a first input node and a positive input port of the amplifier; a second base resistor connected between a second input node and a negative input port of the amplifier; a first resistor unit connected between the second input node and the positive input port of the amplifier, the first resistor unit including at least one resistor and at least one switch; and a second resistor unit connected between the first input node and the negative input port of the amplifier, the second resistor unit including at least one resistor and at least one switch, wherein the first and second resistor units are configured to vary an input resistance to control a gain of an input signal according to control signals received by the first and second resistor units.