Magnetoresistive head with magnetic bias level control

Details Magnetoresistive head with magnetic bias level control Magnetoresistive head with magnetic bias level control

1996-06-24

1999-06-29

Hindi, Nabil

Dynamic magnetic information storage or retrieval

Head

Hall effect

360 66, G11B 5127

Patent

active

059176806

ABSTRACT:
A magnetoreristive head assembly has a magnetic bias level control for continuous compensation of thermal, stray field and stress fluctuations, as well as other types of fluctuations. The magnetoresistive head assembly includes a magnetoresistive element for sensing signals recorded on a magnetic medium, and for generating electrical signals corresponding to the recorded signals. A bias current balancing circuit has an input connected to the magnetoresistive element for sensing the electrical signals and for generating a correction bias current therefrom. A feedback correction circuit converts the correction bias current into a correction magnetic bias field and applies the field to the magnetoresistive element to limit the shifting of a current bias point of the magnetoresistive element and to compensate for bias fluctuations.

REFERENCES:
patent: 3979775 (1976-09-01), Schwarz
patent: 4191977 (1980-03-01), Lewkowicz
patent: 4879610 (1989-11-01), Jove et al.
patent: 5301080 (1994-04-01), Ottesen et al.
patent: 5327303 (1994-07-01), Smith
patent: 5331478 (1994-07-01), Aranovsky

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