Dynamic magnetic information storage or retrieval – General recording or reproducing – Thermomagnetic recording or transducers
Patent
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.
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Froess, "Current Reversed in Inductive Loads", IBM Tech. Disclosure Bulletin, vol. 11, No. 10, Mar. 1969, p. 1365.
Eastman Kodak Company
Holloway William W.
Nguyen Hoa
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