Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of biasing or erasing
Patent
1992-09-08
1994-05-03
Hajec, Donald
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of biasing or erasing
360113, G11B 503
Patent
active
053092945
ABSTRACT:
The present invention is directed to a circuit and method for nullifying a drop in the voltage across an MR head caused a parasitic cable resistance. The invention uses local modeling of the cable resistance in order to generate a nulling voltage, equal in magnitude to the voltage across the cable resistance. The magnitude of the nulling voltage is adjusted as the resistance of the MR head varies within a population of heads. The nulling voltage is added to the bias voltage, in order to negate the effect of the cable resistance.
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K. B. Klaassen, "Magnetic Recording Channel Front-Ends", Pre-print for Nov. 1991 IEEE Trans. on Magnetics, 6 pages.
IBM Technical Disclosure Bulletin, vol. 26, No. 12 May 1984 pp. 6626-6628.
Cefalo Albert P.
Clark Jhihan
Hajec Donald
Hudgens Ronald C.
Rocky Mountain Magnetics, Inc.
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