Xilinx, Inc.
Integrating amplifier with improved noise rejection

Abstract:

An amplifier comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first transistor, a second transistor, and an output node. The first capacitor is electrically connected between a first power supply node and a first node, the second capacitor is electrically connected between the first node and a second node, the third capacitor is electrically connected between a second power supply node and a third node, and the fourth capacitor is electrically connected between the third node and a fourth node. The first transistor has a gate node electrically connected to the second node, and the second transistor has a gate node electrically connected to the fourth node. The output node is selectively connected to the first transistor and the second transistor. The first node and the third node are configured to be selectively electrically connected to a voltage node and a common voltage node.