Patent ID: 6798832
Filing Date: 2004-09-28
Classification: G11B

Abstract:
A semiconductor circuit comprising:a decision feedback equalizer for waveform-equalizing a corrected input signal and generating a waveform-equalized signal, wherein the equalizer compares the waveform-equalized signal with a predetermined reference level to generate a decision signal having first and second decision values and an error signal between the waveform-equalized signal and the decision signal; a dispersion-value calculator, connected to the decision feedback equalizer, for calculating a first dispersion value of the decision signal having the first decision value and a second dispersion value of the decision signal having the second decision value using the error signal and producing a compensation signal using the first and second dispersion values; and an asymmetry compensator, connected to the decision feedback equalizer and the dispersion-value calculator, for receiving an input signal and correcting an asymmetry of the input signal in accordance with the compensation signal and supplying the corrected input signal to the decision feedback equalizer.