Patent ID: 9379920
Filing Date: 2016-06-28
CPC Classification: H04L

Claim Text:
1. A receiver for coupling to a communications channel, comprising: a decision feedback equalizer for receiving an analog input signal, wherein the decision feedback equalizer includes a filter for subtracting a plurality of weighted postcursor decisions from the analog input signal to provide an analog output signal; a postcursor decision circuit coupled to the decision feedback equalizer for receiving the analog output signal and comparing the analog output signal against positive and negative values of a postcursor coefficient to provide a first possible decision and a second possible decision, respectively, and for selecting a current postcursor-based decision as between the first possible decision and the second possible decision responsive to a previous postcursor-based decision; and a precursor cancellation circuit for receiving the analog output signal, the previous postcursor-based decision and the current postcursor-based decision for providing a digital output signal for a previous sample of the analog input signal.