Optical communication of video and audio with cross-talk suppres

Details Optical communication of video and audio with cross-talk suppres Optical communication of video and audio with cross-talk suppres

1985-09-12

1987-08-25

Orsino, Jr., Joseph A.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

307262, 328155, 358143, 370 3, 455618, H04B 900

Patent

active

046898263

ABSTRACT:
A cross-talk suppression circuit is disclosed for use in an optical communications system which employs a light-emitting diode. A video signal and an audio-modulated carrier signal are both coupled to the light-emitting diode. A cross-talk reducing circuit is provided to couple the audio-modulated carrier signal to the light-emitting diode. The circuit comprises a voltage-controlled phase shifter for coupling the audio-modulated carrier signal to the light emitting diode, the phase shifter having a phase shift that is controlled by the video signal.

REFERENCES:
patent: 3875400 (1975-04-01), Pao et al.
patent: 4009385 (1977-02-01), Sell
patent: 4114180 (1978-09-01), Kayanuma
Ueno-"Optical Fiber Communications"-Conf. Intercon 79, Expo Proceeding, Dallas, TX, Feb. 26-Mar. 2, 1979, pp. 172-176.
Dobson et al-"Installation and Performance"-Wire Technology, 7/8:79, vol. 7, No. 4, pp. 83-85.
Brosio et al-"Optical Receiver"-Cselt Rapporti Tecnici-vol. IX, No. 6, Dec. 1981, pp. 583-590.

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