Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of biasing or erasing
Patent
1998-01-09
2000-08-29
Kim, W. Chris
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of biasing or erasing
360 61, G11B 503, G11B 1512
Patent
active
061117153
ABSTRACT:
A magnetic storage apparatus exploits the inherent characteristics of a magnetoresistive element to improve the performance of a magnetic head employing the element. Variations in element height or element thickness of the magnetoresistive element are considered in the selection of a sense current appropriate to the element size, by measuring the voltage between the terminals of the magnetoresistive head and controlling the sense current so that the output reference voltage approaches a predetermined value. In another embodiment, the sense current is controlled so that the voltage amplitude or a reference amplitude are set to a predetermined value. In both embodiments, a conversion table is preferably used to relate voltage amplitudes with sense currents, whereby an appropriate sense current is selected based upon the voltage amplitude.
REFERENCES:
patent: 5412518 (1995-05-01), Christner et al.
patent: 5642244 (1997-06-01), Okada et al.
patent: 5774291 (1998-06-01), Contreras et al.
patent: 5790331 (1998-08-01), Aranovsky
patent: 5831782 (1998-11-01), Kohno et al.
patent: 5978163 (1999-11-01), Cunningham
Suzuki Mikio
Tsuchiya Reijiro
Hitachi , Ltd.
Kim W. Chris
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