System and method for wirelessly communicating a sound signal

Details System and method for wirelessly communicating a sound signal System and method for wirelessly communicating a sound signal

1996-07-25

1998-09-29

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359159, 359172, 359110, 4551512, 379 56, 375238, 370241, 370277, 34082572, 381111, 381172, H04B 1000

Patent

active

058152989

ABSTRACT:
A system for communicating a signal representing the amplitude of a sound signal received at a remotely located transceiver via an optical airlink communication network, the system having an optical transceiver, including an optical receiver and an optical ON/OFF keyed transmitter; a detector coupled to the optical receiver for providing a DC voltage signal output which is substantially proportional to the amplitude of the signal received at the optical receiver; a voltage controlled audio oscillator coupled to the detector for providing an audio output signal of a frequency proportional to the DC voltage signal provided by the detector; a test signal generator for generating a carrier test signal; and a pulse width modulator coupled to the test signal generator, to the voltage controlled audio oscillator, and to the optical transmitter, wherein the pulse width modulator modulates the audio output signal over the carrier test signal to control generation of ON/OFF keyed optical signals by the optical transmitter. A method for communicating a sound signal via an optical airlink communication network is also provided.

REFERENCES:
patent: 4524335 (1985-06-01), Yokoyama
patent: 5282224 (1994-01-01), Harada
patent: 5367394 (1994-11-01), Chuter et al.
patent: 5495357 (1996-02-01), Osterhout
patent: 5506709 (1996-04-01), Segal et al.

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