High resolution hall effect read head

Details High resolution hall effect read head High resolution hall effect read head

1980-11-13

1983-02-01

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 538

Patent

active

043719058

ABSTRACT:
A differential Hall effect magnetic read head exhibiting improved resolution. The head includes dual Hall elements in which the elements are oriented so that their major surface is perpendicular to the surface of the recording medium and biased so that they respond to the component of magnetic flux which is parallel to the surface of the recording medium. Operation in this manner enables information recorded at extremely high densities to be easily read. In an alternative embodiment, a single Hall element is utilized and direct and delayed outputs are differentially compared in order to detect flux transitions.

REFERENCES:
patent: 2866013 (1958-12-01), Reis
patent: 3114009 (1963-12-01), Camras et al.
patent: 3221273 (1965-11-01), Livingston
patent: 3622898 (1971-11-01), Salmon
patent: 3668670 (1972-06-01), Andersen
patent: 3943570 (1976-03-01), Yamamoto et al.
patent: 4040113 (1977-08-01), Gorter
patent: 4068272 (1978-01-01), Kanai et al.
patent: 4296447 (1981-10-01), Lewis
IBM Tech. Disc. Bull., D. A. Nepela et al., Resistive Element for Bias and Noise Cancellation of MR Head, vol. 17, No. 9, Feb. 1975, p. 2759-2760.
IBM Tech. Disc. Bull., R. L. O'Day, Balanced Magnetic Head, vol. 15, No. 9, Feb. 1973, p. 2680.

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