Dynamic magnetic information storage or retrieval – General recording or reproducing – Signal switching
Patent
1994-11-09
1997-05-13
Kim, W. C.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Signal switching
G11B 1514
Patent
active
056298129
ABSTRACT:
A magnetic-tape apparatus with a rotary scanning device in which a plurality of magnetic heads are mounted at the circumference and are associated with rotating amplifiers, which for the signal transfer are connected to stationary devices at a stator side via respective rotary transformers. The stator side of the rotary scanning device includes a generator for the generation of a phase-data signal including a periodically recurring pulse sequence bounded by synchronization pulses (S) and comprising between the synchronization pulses a bit-serial sequence of pulses whose pulse edges time the transfer of the signals from and to the magnetic heads. A feedback register circuit at the rotor side derives various timed head-switching signals for turning on/off the rotating amplifiers from an optically transmitted phase-data signal.
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patent: 5315453 (1994-05-01), Sato
patent: 5369534 (1994-11-01), Han
Franzblau Bernard
Kim W. C.
U.S. Philips Corporation
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