Magnetic field modulation magnet-optical recording apparatus in

Details Magnetic field modulation magnet-optical recording apparatus in Magnetic field modulation magnet-optical recording apparatus in

1992-07-08

1994-07-12

Pascal, Robert J.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Thermomagnetic recording or transducers

360 46, 360114, 360 29, 360 30, 360 61, 369 59, 369124, G11B 502

Patent

active

053294084

ABSTRACT:
A positive direction current source is connected to a magnetic head coil via a multiplier and a switching device, and a negative direction current source is connected to the magnetic head coil via the switching device. The output current of the positive direction current source is controlled to a level appropriate for generating a magnetic field forming a magnet-optical recording mark based on the amplitude of an information signal by the multiplier. The switching device is turned on/off by a carrier signal. As a result, a magnetic head driving signal can be obtained having the positive direction current value modulated based on the amplitude of the information signal.

REFERENCES:
patent: 5172364 (1992-12-01), Yoshimoto et al.

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