ADAPTATION OF GAIN OF BASELINE WANDER SIGNAL

摘要

A receiver disposed in a serializer/deserializer (SerDes) system includes a coupling capacitor configured to receive a serial input signal from a transmitter operatively coupled with the receiver via a communication channel established therebetween and to output a capacitance output signal, an equalizer configured to receive a signal including the capacitance output signal having a baseline wander gain subtracted therefrom, a running disparity generator receiving decoded symbols and generating a running disparity signal, and a low-pass filter receiving the running disparity signal and outputting the BLW gain.

主权项

1. A receiver disposed in a serializer/deserializer (Ser Des) system, the receiver comprising:
a coupling capacitor configured to receive a serial input signal from a transmitter operatively coupled with the receiver via a communication channel established therebetween and to output a capacitance output signal; an equalizer configured to receive a signal comprising the capacitance output signal having a baseline wander gain subtracted therefrom, and to output an equalized signal; a running disparity generator receiving decoded symbols and generating a running disparity signal; and a low-pass filter receiving the running disparity signal and outputting the baseline wander gain, wherein the coupling capacitor is part of an on-chip alternating current coupling capacitance that causes a high-pass filter to be applied to the received serial input signal and wherein a cut-off frequency of the low-pass filter is equal to that of the high-pass filter at least due to the on-chip alternating current coupling capacitance.