Reproducing and amplifying circuit for magnetoresistive head

Details Reproducing and amplifying circuit for magnetoresistive head Reproducing and amplifying circuit for magnetoresistive head

1981-11-24

1985-01-08

Stellar, George G.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 500

Patent

active

044929978

ABSTRACT:
A reproducing and amplifying circuit for a magnetoresistive head comprises an amplifying circuit with a feedback circuit. The head is part of the feedback circuit. Thus, the head is connectable with the feedback circuit so that the head is supplied with a drive current by the amplifying circuit and a reproduced electric signal outputted by the head is coupled to the amplifying circuit for amplification. A magnetoresistive element may be provided in the amplifying circuit to effect temperature compensation for the head. The reproducing and amplifying circuit is simple in structure, has an enhanced signal-to-noise ratio and is immune to temperature variation.

REFERENCES:
patent: 3458827 (1969-07-01), Taylor et al.
patent: 3493694 (1970-02-01), Hunt
patent: 3918091 (1975-11-01), Walraven et al.
patent: 3979775 (1976-09-01), Schwarz
patent: 4050083 (1977-09-01), Harr
patent: 4280158 (1981-07-01), de Niet
Halbleiter-Schaltungstechnik, 3rd Ed. pp. 142-143 by Tietze & Schenk 1974.

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