公开(公告)号：US11489503B1

公开(公告)日：2022-11-01

申请号：US17064595

申请日：2020-10-06

Applicant: XILINX, INC.

Inventor： Vipul Bajaj ,  Bruno Miguel Vaz

IPC: H03F3/45

Abstract: Cross-coupling of switched-capacitor output common-mode feedback capacitors in dynamic residue amplifiers is provided via a cross-coupled amplifier, comprising: a current source connected to a first node; a feedback capacitor connected to the first node and a second node; a feedback resistor connected between the second node and ground; an amplifier having an input connected to the second node; a gain transistor having: a drain connected to the first node; a source connected to ground; and a gate connected to an output of the amplifier; and a load capacitor connected to the first node and ground.

公开(公告)号：US11218160B1

公开(公告)日：2022-01-04

申请号：US17037371

申请日：2020-09-29

Applicant: XILINX, INC.

Inventor： Bruno Miguel Vaz ,  Vipul Bajaj

IPC: H03M1/12 ,  H03M1/44 ,  H03M1/36

Abstract: An analog-to-digital (ADC) circuit is disclosed that includes a first stage, a first amplifier, and a second amplifier. The first stage includes signal processing circuitry, and is configured to receive a differential input signal and generate a differential residue voltage signal on differential output nodes of the first stage. The first amplifier includes first amplifier circuitry. The first amplifier is electrically connected to the differential output nodes of the first stage, and configured to receive the differential residue voltage signal, and generate a first differential voltage signal from the differential residue voltage signal. The second amplifier includes second amplifier circuitry. The second amplifier is electrically connected to differential output nodes of the first amplifier, and configured to receive the first differential voltage signal, and generate a second differential voltage signal from the first differential voltage signal.

公开(公告)号：US11211901B1

公开(公告)日：2021-12-28

申请号：US17037378

申请日：2020-09-29

Applicant: XILINX, INC.

Inventor： Vipul Bajaj ,  Bruno Miguel Vaz

IPC: H03F1/26 ,  H03F3/30 ,  H03F3/00 ,  H03F3/217

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.