EQUALIZER AND REGENERATED SIGNAL PROCESSOR

摘要

PROBLEM TO BE SOLVED: To provide an equalizer which can accurately compensate nonlinearity of an input signal which is caused by an asymmetry phenomenon or the like when a disk is manufactured. SOLUTION: Two tap coefficients cip, cinare prepared in coefficient multipliers 102-i. A comparator 103 compares the value of a center tap signal x3, a reference signal, with a threshold 108, and produces a selection signal SS on the basis of comparison results. On the basis of the selection signal SS, the coefficient multipliers 102-i select either one of the tap coefficients cip, cinas a selection tap signal ci, and multiplies xiby ci. As a result, the tap coefficients of the whole equalizer can be adaptively switched over, according to the value of center tap signal x3, the reference signal, so that the accurate compensation to the nonlinearity of an input signal is enabled. COPYRIGHT: (C)2004,JPO