Signal transmitting device with an optical coupler for use in a

Details Signal transmitting device with an optical coupler for use in a Signal transmitting device with an optical coupler for use in a

1996-09-26

1998-08-18

Cao, Allen

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 84, G11B 552, G11B 5027

Patent

active

057965595

ABSTRACT:
A signal transmitting device for use in a head drum assembly includes a fixed shaft, a rotary drum rotatably mounted around the fixed shaft, at least two magnetic heads arranged on and attached to the rotary drum with a same angular separation therebetween, a same number of laser diodes as the magnetic heads, each of the laser diodes being capable of converting electrical signal produced in the magnetic heads into optical signal and emitting the optical signal toward a center of the fixed shaft and a photo diode adapted to receive the optical signal from one of the laser diodes and to convert the received optical signal into electrical signal.

REFERENCES:
patent: 4511934 (1985-04-01), Ohira et al.
patent: 4814902 (1989-03-01), Fujiwara et al.
patent: 4819096 (1989-04-01), Grant et al.
patent: 4967290 (1990-10-01), Grant et al.
patent: 4973123 (1990-11-01), Lutzeler
patent: 5373404 (1994-12-01), Katou et al.
patent: 5384676 (1995-01-01), Yokoyama et al.

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