Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1994-08-05
1996-11-12
Dinh, Tan
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
360114, 360 46, G11B 1100
Patent
active
055747027
ABSTRACT:
A magnetic head drive device includes a pair of auxiliary coils, a pair of switch elements respectively connected in series with the pair of auxiliary coils, and a magnetic head. The magnetic head is arranged between a node of the pair of auxiliary coils and the pair of switch elements. The switch elements are driven by control of a switch element drive device such that at least one of the pair of switch elements is maintained in an ON state for a predetermined period of time upon completion or interruption of information recording by the magnetic head. A current contol device is further provided so as to gradually decrease a current to be supplied to the pair of auxiliary coils during the ON state.
REFERENCES:
patent: 5351155 (1994-09-01), Ishii
patent: 5359466 (1994-10-01), Fuji et al.
patent: 5377055 (1994-12-01), Ishii
patent: 5377172 (1994-12-01), Hino et al.
patent: 5394380 (1995-02-01), Hasegawa
Patent Abstracts of Japan, Kokai No. 63-244402, vol. 13, No. 54, Feb. 1989.
Patent Abstracts of Japan, Kokai No. 5-174309, vol. 17, No. 590, Oct. 1993.
Canon Kabushiki Kaisha
Dinh Tan
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