Transmitting device for communications equipment for generating

Details Transmitting device for communications equipment for generating Transmitting device for communications equipment for generating

1979-04-25

1982-01-12

Groody, James J.

Communications: electrical

Systems

Selsyn type

332 21, H04B 354

Patent

active

043108296

ABSTRACT:
A transmitting device for generating communication signals to be superimposed on an AC distribution network. A resonant load circuit coupled to the network conductors includes a capacitor with a transistor switch and reverse polarity diode connected in parallel therewith. Current and voltage threshold circuits control the transistor switch such that an audio frequency communication signal is generated by the load circuit.

REFERENCES:
patent: 3445814 (1969-05-01), Spalti
patent: 3488517 (1970-01-01), Cowan et al.
patent: 3509537 (1970-04-01), Haberly
patent: 3997973 (1976-12-01), Buss
patent: 4012734 (1977-03-01), Jagoda et al.
patent: 4021797 (1977-05-01), Hofmeister
patent: 4031528 (1977-06-01), Harrison
patent: 4057793 (1977-11-01), Johnson et al.
patent: 4106007 (1978-08-01), Johnston et al.

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