Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1979-05-22
1981-07-07
Wolff, John H.
Dynamic magnetic information storage or retrieval
Head
Hall effect
360126, 324252, G11B 530, G11B 512
Patent
active
042778085
ABSTRACT:
A magnetic transducer head having first and second magneto-resistance effect elements, each of which is made of a thin film having the magneto-resistance effect and which are arranged on approximately one line, a current source for flowing currents through the first and second magneto-resistance effect elements, and a bias source for applying bias magnetic fields to the first and second magneto-resistance effect elements. In this case, the bias magnetic field is selected from bias magnetic fields which have the direction of about .+-.(.pi./4).+-.(n/2).pi., where n is an integer, with respect to the currents flowing through the first and second magneto-resistance effect elements, and the current source and the bias source are so connected that when a uniform signal magnetic field is applied to the first and second magneto-resistance effect elements, the resistances thereof are varied in the opposite directions with respect to each other and the outputs from the first and second magneto-resistance effect elements are derived differentially.
REFERENCES:
patent: 3860965 (1975-01-01), Voegeli
patent: 3864751 (1975-02-01), Beaulieu et al.
patent: 3967368 (1976-07-01), Brock et al.
patent: 4012781 (1977-03-01), Lin
patent: 4021728 (1977-05-01), Makino et al.
patent: 4024489 (1977-05-01), Bajorek et al.
patent: 4047236 (1977-09-01), Lee
IBM/TDB vol. 17, No. 11, Apr. 1975, "Balanced Resistance Magnetoresistive head" by Anderson et al.
Sony Corporation
Wolff John H.
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