Transmitter/receiver circuit for signal transmission over power

Details Transmitter/receiver circuit for signal transmission over power Transmitter/receiver circuit for signal transmission over power

1982-12-20

1985-05-14

Groody, James J.

Communications: electrical

Systems

Selsyn type

307 3, H04B 354

Patent

active

045175489

ABSTRACT:
A system transmits and receives control signals for various types of indoor devices using the existing power wiring in houses and buildings. The transmitter section of the power wiring transmission system is provided with a circuit in which the output of a sine wave oscillator is fed to an emitter-follower through a photocoupler and this output is then fed to the indoor power distribution line through a series resonance circuit after stepping down with a transformer; and the receiving section is provided with a circuit in which the signal from the distribution line is fed to a parallel resonance circuit after passing through a series resonance circuit. Moreover, the input and output sections are resistor terminated.

REFERENCES:
patent: 3229184 (1966-01-01), Churchill
patent: 3878322 (1975-04-01), Sullivan
patent: 4180804 (1979-12-01), Watanabe
patent: 4408185 (1983-10-01), Rasmussen

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