Timing recovery apparatus and method using equalizer and apparatus for

Abstract

An apparatus for recovering timing using an equalizer of an E2PR4ML method and a method therefor and a last data judging apparatus. The timing recovery apparatus includes a sampling unit for sampling a reproduced signal and an equalizing unit for filtering the signal sampled by the sampling unit so as to output as a target signal E2PR4ML for detecting a timing error signal using the target signal output from the equalizing unit, phase synchronizing the detected timing error signal, and providing the phase-synchronized signal as a clock signal of the sampling unit. The timing recovery apparatus also includes a feedback filter using predetermined binary data as an input, an adder for adding the output signal of the feedback filter to the output signal of the equalizing unit and for outputting a new target signal, a data judging unit for detecting binary data on the basis of the new target signal and for generating quaternary data from the detected binary data, and a timing recovery unit for recovering timing by calculating the timing error of the sampling clock using the output signal of the data judging unit.