Patent ID: 9225367
Filing Date: 2015-12-29
Classification: H04B,H04L

Abstract:
1. A decision feedback equalizer, comprising: a receive end, a superimposer, an adjusting unit, a first decision device and a second decision device; wherein the receive end is configured to receive a first differential signal, synchronize a local clock with a frequency of the first differential signal to make a cycle of the local clock consistent with a cycle of the first differential signal, and input the first differential signal to the superimposer; wherein the superimposer is configured to: superimpose the first differential signal input by the receive end on a square-wave signal output by the adjusting unit to obtain a second differential signal; and input the second differential signal to a differential input end of the first decision device and a differential input end of the second decision device; wherein the adjusting unit is configured to perform at least one of phase adjustment and amplitude adjustment for a second square-wave signal output by the second decision device, and input a square-wave signal obtained after the adjustment to the superimposer and a feedback input end of the second decision device; wherein the first decision device is configured to compare a voltage amplitude of the second differential signal input to the differential input end of the first decision device with a set value, and output a first square-wave signal; and wherein the second decision device is configured to compare the voltage amplitude of the second differential signal input to the differential input end of the second decision device with a voltage amplitude of the square-wave signal that is input to the feedback input end by the adjusting unit, and input the second square-wave signal to the adjusting unit.