Equalization adaptation engine assisted baseline wander correction of data

Abstract

Systems, circuitry and methods correct baseline wander while reducing amplitude difference between the input signal to a data sampler and the output signal of an output-swing-controlled buffer. Example baseline wander correction circuitry comprises a baseline wander correction loop that receives an equalized data signal, a feedback signal and a buffer control signal, and corrects baseline wander in the data sampler input signal. Baseline wander correction loop generates the buffer output signal based on the data sampler output signal and the buffer control signal. Baseline wander correction circuitry also comprises a feedback circuit that receives the data sampler output signal and generates the feedback signal, and an amplitude estimation loop that receives the data sampler input and output signals and outputs the buffer control signal to control the peak-to-peak swing of the buffer output signal.