Magnetic disc apparatus

Details Magnetic disc apparatus Magnetic disc apparatus

1993-02-23

1997-06-10

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Recording or reproducing an information signal and a control...

360 65, 360 45, G11B 502

Patent

active

056382251

ABSTRACT:
A magnetic disc apparatus using an electric filter for waveform equalization of a read signal is provided. The optimum parameters are set for every head and the writing and reading operations are executed on the basis of the optimum characteristics. At the start of the use of the apparatus, the control information of the circuit parameters previously recorded on a magnetic recording medium is read out, thereby forming a set value table in which the optimum values of the circuit parameters including at least the electric filter have been stored every magnetic head. After the table was formed, prior to the writing or reading operation, the contents of the set value table corresponding to the designated magnetic head are read out and the circuit parameters of the circuit section including the electric filter are controlled and optimized on the basis of the contents read out.

REFERENCES:
patent: 4564869 (1986-01-01), Baumeister
patent: 4945311 (1990-07-01), Smith
patent: 5008761 (1991-04-01), Nishiyama et al.
patent: 5068754 (1991-11-01), Garde
patent: 5087992 (1992-02-01), Dahandeh et al.
patent: 5107378 (1992-04-01), Cronch et al.
patent: 5120985 (1992-06-01), Kimura
patent: 5163003 (1992-11-01), Kimura
Transactions on Magnetics, "An Improved Pulse-Slimming Method for Magnetic Recording", Richard C. Schneider, vol. Mag-11, No. 5, Sep. 1975.
IBM Technical Disclosure Bulletin, "Dasd Recording Sub-System Parameter Optimization by Head Radius", IBM Corp 1990, vol. 33, No. 3A, Aug. 1990.
IBM Technical Disclosure Bulletin, "Analog Adaptive Equalizer with Enhanced Self-Adjustability", IBM Corp 1990, vol. 33, No. 2, Jul. 1990.
Dictionary of Computers, Information Processing, and Telecommunications, 2d. Ed., by Jerry Rosenberg, .COPYRGT.1987 John Wiley & Sons, Inc. NY, p. 544.
"Implementation of PRML in a Rigid Disk Drive", J.D. Coker, R.L. Galbraith, G.J. Kerwin, J.W. Raw, P.A. Ziperovich, IEEE Transactions on Magnetics, vol. 27, No. 6, Nov., 1991.

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