Magnetoresistive sensor and head with alternating magnetic bias

Details Magnetoresistive sensor and head with alternating magnetic bias Magnetoresistive sensor and head with alternating magnetic bias

1998-09-01

2000-02-15

Klimowicz, William J.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 539

Patent

active

060259795

ABSTRACT:
A magnetoresistive sensor has a magnetic bias field source that generates an alternating magnetic bias field, a giant magnetoresistive sensing element positioned in the alternating magnetic bias field, and a resistance detecting circuit that detects changes in the electrical resistance of the giant magnetoresistive sensing element caused by the combined action of the alternating magnetic bias field and an external magnetic field. The alternating magnetic bias field enables small external magnetic fields to be detected with high sensitivity.

REFERENCES:
patent: 4075671 (1978-02-01), Cheatham et al.
patent: 4259703 (1981-03-01), Young et al.
patent: 4679107 (1987-07-01), Imakoshi et al.
patent: 5574605 (1996-11-01), Baumgart et al.
patent: 5585983 (1996-12-01), Sugiyama et al.

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