Patent ID: 6144515
Filing Date: 2000-11-07
Classification: G11B,H03H

Abstract:
A magnetically recorded-signal reproducer comprising a read head using an MR element for reading the code signal recorded on a recording medium, amplification means for amplifying reproduced signals output from said read head, means for sampling the signal output from said amplification means at a predetermined cycle, means for equalizing the signal output from said sampling means in accordance with a predetermined equalization rule, and means for judging the recorded codes read by said read head;wherein said equalization means is provided with means for correcting the signal distortion inherent to said read head and included in the signal output from said sampling means;wherein said equalization means includes a plurality of multistage-connected delay elements for delaying signals output from said sampling means, a plurality of coefficient processing units each connected to the output tap of one of said delay elements or the input tap of the first-stage delay element to multiply a signal input from the connected tap by a predetermined coefficient value and output the multiplication result, and an adder for adding the signal outputs from coefficient processing units; andwherein said signal distortion correction means includes coefficient selection means for selecting a coefficient value from a plurality of predetermined coefficient values in accordance with the signal that is input every time the signal is supplied to each of said coefficient processing units, wherein each of said coefficient processing units has a plurality of predetermined coefficient values.