Xilinx, Inc.
Pipelined analog-to-digital converter

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.