Patent ID: 6614840
Filing Date: 2003-09-02
Classification: H04L

Abstract:
An equalizer with a phase-locked loop comprising:a phase rotator which rotates a phase of a received signal to output a rotated signal; an impulse response detector which detects impulse responses of a transmission line through which the received signal has been transmitted on the basis of said rotated signal; a first region designator which designates a first region on the basis of said impulse responses; a second region designator which designates a second region on the basis of said impulse responses; an equalizer which estimates a sequence on the basis of said rotated signal by using said impulse responses in said first region; a replica generator which generates a replica of the received signal on the basis of said sequence by using said impulse responses in said second region; a phase detector which detects a phase difference between said replica and said rotated signal; a variable delay circuit which delays said rotated signal to be supplied to said phase detector by a period determined by said first region and said second region; and means for controlling said phase rotator on the basis of said phase difference to decrease said phase difference.