Drive circuit for a dual-element magnetic head assembly which in

Details Drive circuit for a dual-element magnetic head assembly which in Drive circuit for a dual-element magnetic head assembly which in

1994-05-31

1995-11-28

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 48, 360 66, G11B 509, G11B 503

Patent

active

054713498

ABSTRACT:
A circuit for driving a dual-element magnetic head assembly made up of a magnetoresistive (MR) readback head and a recording head for recording and reproducing data out of a magnetic recording medium. When the head assembly ends a recording operation, the last recording magnetic field is oriented in a direction for deepening the bias to a MR element at all times. A bias electric field for the MR element is continuously applied even during recording operation. The circuit, therefore, stabilizes the bias to the MR element at the end of a recording operation, reduces noise during readback operation, and prevents the readback output from fluctuating every time a recording operation is performed.

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