Magnetic head driving device and magnetooptical recording appara

Details Magnetic head driving device and magnetooptical recording appara Magnetic head driving device and magnetooptical recording appara

1994-12-21

1997-08-26

Hajec, Donald T.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Thermomagnetic recording or transducers

360 66, G11B 509, G11B 503

Patent

active

056616120

ABSTRACT:
A magnetic head drive device is provided with a magnetic head for generating a magnetic field, a pair of switching elements for switching a current flow direction in the magnetic head, and auxiliary coils respectively connected serially to the switching elements. The current in the magnetic head is controlled by on/off operations of the paired switching elements so as to generate a magnetic field modulated according to an information signal to be recorded. Additional switching elements are serially connected to the auxiliary coils, respectively. In magnetic field modulation recording, the additional switching elements are maintained in the on-state while the modulated magnetic field is generated by the on/off operations of the paired switching elements. In optical modulation recording, the additional switching elements and the paired switching elements are controlled so as to fix the current direction in the magnetic head to generate a magnetic field corresponding to an operation mode such as an erasing mode or a recording mode.

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