High speed switching circuit for controlling current flow in a b

Details High speed switching circuit for controlling current flow in a b High speed switching circuit for controlling current flow in a b

1991-08-26

1993-02-23

Nguyen, Hoa

Dynamic magnetic information storage or retrieval

General recording or reproducing

Thermomagnetic recording or transducers

369 13, 360114, 360 66, G11B 1304, G11B 1112, G11B 1110

Patent

active

051895676

ABSTRACT:
A resonant AC circuit includes a network of switching elements (e.g., power field-effect transistor) by which the direction of current flow through a coil can be selectively switched at each time in the current cycle, when the current amplitude is substantially zero. Such circuit is particularly advantageous and useful in magneto-optic recording systems for switching the polarity of a magnetic field enabling the direct-overwriting of information on a previously recorded magneto-optic recording element at a high data transfer rate.

REFERENCES:
patent: 2112542 (1938-03-01), Myers
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patent: 4242714 (1980-12-01), Yoshida et al.
patent: 4249225 (1981-02-01), Mapes
patent: 4872078 (1989-10-01), Gerber et al.
patent: 4937802 (1990-06-01), Omori et al.
patent: 5091897 (1992-02-01), Otokawa et al.
Froess, "Current Reversed in Inductive Loads", IBM Tech. Disclosure Bulletin, vol. 11, No. 10, Mar. 1969, p. 1365.

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