Patent ID: 6720799
Filing Date: 2004-04-13
Classification: G06G,G11C,H03H,H03K

Abstract:
A replica network that controls a resistance of a signal conducting signal MOSFET switch in a switched capacitor circuit, comprising:a bridge circuit, wherein a MOSFET resistor is disposed in a resistor branch of said bridge circuit; and an operational amplifier, wherein a noninverting terminal of said operational amplifier is connected to a first node of said bridge circuit, an inverting terminal of said operational amplifier is connected to a second node of said bridge circuit, said second node is separated from said first node by a third node of said bridge circuit, an output of said operational amplifier is connected to a gate terminal of said MOSFET resistor and to a gate terminal of the signal conducting MOSFET switch in the switched capacitor circuit to control the resistance of the signal conducting MOSFET switch, the switched capacitor circuit having a sampling capacitor connected to the signal conducting MOSFET switch.