Magneto-resistance effect type magnetic head device

Details Magneto-resistance effect type magnetic head device Magneto-resistance effect type magnetic head device

1995-09-20

1997-07-15

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Head

Hall effect

360108, G11B 539

Patent

active

056488866

ABSTRACT:
A magneto-resistance effect type magnetic head having high output can be obtained as a reproduction head for a rotating drum type VTR by only providing a conventional rotary transformer with a rotor and a stator for supplying a bias current without a need for a special mechanism for transmitting a direct current. There is provided a magneto-resistance effect type magnetic head device to be mounted on a rotating drum having a bias conductor and a sense conductor, including a rotary transformer connected to the bias and sense conductors wherein an alternating current having a frequency lower than the frequency of a recording signal is applied to at least one of stator channels facing rotor channels of the rotary transformer. A current is applied to at least either the bias conductor or sense conductor at the stator side of the rotary transformer to produce a non-direct current at a terminal on the rotor side of the rotary transformer connected to the magneto-resistance effect type magnetic head only in a time zone when the magneto-resistance effect type magnetic head is not required to reproduce the recording signal and to produce a direct current at a terminal on the rotor side in a time zone when the recording signal must be reproduced.

REFERENCES:
patent: 4000512 (1976-12-01), Lau
patent: 5011818 (1991-04-01), Katoka et al.
patent: 5515220 (1996-05-01), Alioth

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