Low voltage, high current magnetic transducer drive system for d

Details Low voltage, high current magnetic transducer drive system for d Low voltage, high current magnetic transducer drive system for d

1992-07-08

1994-04-12

Pascal, Robert J.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369 59, 369116, 360114, G11B 1100

Patent

active

053032128

ABSTRACT:
A magnetic transducer is provided which has two coils wound in opposite directions on a core. The transducer coils are connected to a direct current power supply via two switches respectively. A write control circuit applies a binary write control signal, representative of digital information to be recorded, to the switches thereby causing the same to be alternately turned on and off. A reactor is connected in series with the power supply, so that each transducer coil is excited not only from the power supply but also from the reactor. An alternate embodiment is disclosed in which the transducer has only one coil connected to a power supply via a bridge circuit of four switching transistors. The transducer coil is alternately excited in opposite directions from a power supply and a reactor connected in series therewith.

REFERENCES:
patent: 4665443 (1987-05-01), Tanaka
patent: 4843494 (1989-06-01), Cronin et al.
"Overwriting Technologies of Magneto-optical Disks by Magnetic Field Modulation Method", Television Gakkai Technical Reports published Feb. 1990, pp. 63-70, vol. 14.

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