Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of biasing or erasing
Patent
1996-09-23
1999-11-02
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of biasing or erasing
360 67, 360 68, G11B 503
Patent
active
059781637
ABSTRACT:
A method and apparatus adaptively controls the bias supply source for magnetoresistive (MR) read heads within a Direct Access Storage Device (DASD) to provide an optimized bias level for the ambient temperature. An optimal bias level for a given ambient temperature is provided in real time by sensing a temperature within a thermal path to the head (e.g., the ambient temperature surrounding the head) and adjusting the bias supply level to the maximum allowable level for that temperature. This adjustable bias level will thereby enhance MR transducer head sensitivity, improve the signal-to-noise ratio, and also reduce errors in reading data from magnetic storage media within the DASD. The maximum allowable bias supply source level is controlled so as to preserve the overall life expectancy of the MR heads.
REFERENCES:
patent: 4492997 (1985-01-01), Arai et al.
patent: 4691259 (1987-09-01), Imakoshi et al.
patent: 4712144 (1987-12-01), Klaassen
patent: 5404102 (1995-04-01), Gokhale et al.
patent: 5408365 (1995-04-01), Van Doorn et al.
patent: 5412518 (1995-05-01), Christner et al.
patent: 5440233 (1995-08-01), Hodgson et al.
patent: 5461517 (1995-10-01), Suda et al.
"Circuit for Stabilizing Magneto-Resistive Heads", IBM Technical Disclosure Bulletin, vol. 31, No. 4, Sep. 1988, pp. 16-17.
Dols, C., et al., "Temperature-Regulated Bismuth Resistor for Magnetic-Field Measurements", The Review of Scientific Instruments, vol. 29, No. 5, pp. 349-354.
International Business Machines - Corporation
Psitos Aristotelis M.
Wong K.
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