Method and apparatus for reducing jitter in overlaid traces of an eye diagram of a recovered signal generated based on a received data signal

摘要

A receiver including recovery, error, and control modules. The recovery module: receives a data signal and an offset value; based on a coefficient, equalizes the data signal to generate an equalized signal; and generates a recovered signal based on the equalized signal. The recovered signal includes data recovered by the recovery module. The error module generates an error value based on a difference between the equalized signal and a threshold. The control module, based on the offset value, the recovered signal, and the error value: generates the coefficient; determines the threshold; and determines a characteristic of an eye diagram of the recovered signal. The recovered signal has a non-repeating pattern such that overlaid traces of the recovered signal are in a shape of an eye and provide the eye diagram. The overlaid traces include jitter. The control module generates the coefficient to reduce an amount of the jitter.

主权项

1. A receiver comprising:
a recovery module configured to (i) receive, from a network device, a data signal and an offset value, (ii) based on a coefficient, equalize the data signal to generate a first equalized signal, and (iii) generate a recovered signal based on the first equalized signal, wherein the recovered signal includes data (a) transmitted by the network device to the receiver, and (b) recovered by the recovery module; an error module configured to generate an error value based on a difference between the first equalized signal and a first threshold; a control module configured to, based on the offset value, the recovered signal, and the error value, (i) generate the coefficient, (ii) determine the first threshold, and (iii) determine a first characteristic of an eye diagram of the recovered signal, wherein the recovered signal has a non-repeating pattern such that overlaid traces of the recovered signal are in a shape of an eye and a plot of the overlaid traces provides the eye diagram, wherein the overlaid traces of the recovered signal comprise jitter, and wherein the control module is configured to generate the coefficient to reduce an amount of the jitter in the overlaid traces of the recovered signal; and a first interface configured to transmit the first characteristic of the eye diagram to the network device.