Patent ID: 8723597

Claim:
A switched capacitor circuit, comprising: an inverting amplifier to remove an offset using a chopper stabilization circuit; a sampling unit connected between an input terminal and the inverting amplifier; and a feedback unit connected to the inverting amplifier in parallel, wherein the inverting amplifier comprises: a pair of differential inverters; a first chopper stabilization circuit, connected to input terminals of the pair of differential inverters, to transmit an input signal to the pair of differential inverters by inverting the input signal periodically; and a second chopper stabilization circuit, connected to output terminals of the pair of the differential inverters, to transmit an output signal of the pair of differential inverters to the output terminals by inverting the output signal periodically, wherein the sampling unit comprises: a first pair of switches connected between the input terminals and a first pair of nodes, and to be turned ON in response to a first control signal being received; a second pair of switches connected between the first pair of nodes and a ground, and to be turned ON in response to a second control signal being received; a third pair of switches connected between a second pair of nodes and the ground, and to be turned ON in response to the first control signal being received; a fourth pair of switches connected between the second pair of nodes and a third pair of nodes, and to be turned ON in response to the second control signal being received; and a pair of sampling capacitors connected between the first pair of nodes and the second pair of nodes.