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Data recording and reproducing apparatus having read/write circuit with programmable parameter means

  • US 5,416,646 A
  • Filed: 11/12/1993
  • Issued: 05/16/1995
  • Est. Priority Date: 11/12/1992
  • Status: Expired due to Term
First Claim
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1. A data recording and reproducing apparatus, comprising:

  • read and write circuit means for reproducing recorded data from a signal read out from a disk by a head, for outputting a write signal to the head for recording data to the disk, the read and write circuit means comprising a filter circuit with an input means for inputting at least one parameter of a cutoff frequency and quantity of boost for said filter circuit;

    specifying means for preparing a plurality of parameters for determining an operation characteristic of said read and write circuit means and for specifying the parameter in a predetermined order;

    memory means for storing the parameter to be inputted to said read and write circuit means;

    read and write control means for inputting the parameter specified by said specifying means to said input means of said read and write circuit means to execute an operation of said read and write circuit means for every parameter set in said predetermined order;

    determining means for measuring an error rate of read data reproduced from the disk by the head for every parameter in accordance with said read and write operation of said read and write circuit means to determine a parameter corresponding to a minimum error rate; and

    memory control means for storing the parameter determined by said determining means to the memory means as a suitable value for said read and write means.

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