Patent ID: 9558845
Date: 2017-01-31
CPC Classifications: G11C,H03H,H03M

Claim:
1. A switched-capacitor integrator, comprising: an amplifier having first and second output nodes and first and second input nodes; a first integration capacitor coupled between the first output node and the first input node of the amplifier; a second integration capacitor coupled between the second output node and the second input node of the amplifier; first and second sampling capacitors, each having a first terminal and a second terminal; a first set of switches configured, during a first sampling phase of the integrator, to connect first and second voltages of a differential signal with the first terminals of the first and second sampling capacitors, respectively; a second set of switches configured to connect the second terminals of the first and second sampling capacitors with a reference potential during the first sampling phase of the integrator, wherein a switching frequency of the first set of switches is less than a switching frequency of the second set of switches; and a third set of switches configured, during a first integration phase of the integrator, to connect the second terminals of the first and second sampling capacitors with the first and second input nodes of the amplifier, respectively.