Magnetoresistive reading head

Details Magnetoresistive reading head Magnetoresistive reading head

1979-06-06

1981-07-21

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Head

Hall effect

360 66, 360123, G11B 502, G11B 512, G11B 530

Patent

active

042801583

ABSTRACT:
A magnetic reading head having a magnetoresistive element which is connected to a reading amplifier. In order to reduce the modulation noise (Barkhausen effect) when making the relationship between the resistance variation and the strength of the signal field linear in a negative feedback loop of the reading amplifier an electric turn is present which turn is positioned relative to the magnetoresistive element in such manner that a negative feedback field (Ht) can be generated with it which causes a magnetic flux in the element which is directed oppositely to the magnetic flux caused in the element by a magnetic field (H.sub.y) to be detected.

REFERENCES:
patent: 3493694 (1970-02-01), Hunt
patent: 3585314 (1971-06-01), Korn
patent: 4050086 (1977-09-01), Harr
patent: 4122505 (1978-10-01), Kuijk
IBM Tech. Disc. Bull., Nepela et al., Resistive Element for Bias and Noise Cancellation of MR Head, vol. 17, No. 9, Feb. 1975, pp. 2759-2760.

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