Pulse or digital communications – Repeaters – Testing
Patent
1988-09-06
1990-10-02
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
375106, 455600, H04B 300
Patent
active
049612050
ABSTRACT:
A photo coupling device optically connects a transmission unit and a reception unit. The photo coupling device includes a photo emitter and a photo receptor connected via an optical path. The photo emitter is disposed in the transmission unit. The photo emitter is supplied with a transmission digital data signal and generates an optical signal corresponding to the transmission digital data signal. The photo receptor is disposed in the reception unit and receives the optical signal. The photo receptor is switched by short electrical pulses. The photo receptor samples the optical signal and converts the sampled optical signal into a corresponding digital signal at moments of occurrence of the short electrical pulses. A sync signal is transmitted from the transmission unit to the reception unit. The sync signal has a fixed timing relationship with the transmission digital data signal. The short electrical pulses are generated on the basis of the sync signal and are synchronized with the transmission digital data signal.
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patent: 4596048 (1986-06-01), Dunki-Jacobs
patent: 4727535 (1988-02-01), Brandt
patent: 4736394 (1988-04-01), Giovannelli et al.
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patent: 4757279 (1988-07-01), Balzano
patent: 4847873 (1989-07-01), Kuwaoka et al.
Chin Stephen
Safourek Benedict V.
Victor Company of Japan Ltd.
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