Receiver for A.C. electrical supply signalling arrangement

Details Receiver for A.C. electrical supply signalling arrangement Receiver for A.C. electrical supply signalling arrangement

1980-12-02

1983-07-05

Crosland, Donnie L.

Communications: electrical

Systems

Selsyn type

340310R, 328127, 328151, H04B 354

Patent

active

043921213

ABSTRACT:
A receiver for an a.c. electrical supply signalling arrangement of the kind in which information is transmitted by impressing on the supply voltage waveform voltage reductions which bridge the zero crossings in the waveform wherein detection by the receiver of an impressed voltage reduction is achieved by comparing the integral of the supply voltage over a period immediately preceding a voltage zero crossing when a voltage reduction is present with a corresponding integral obtained when no voltage reduction is present.

REFERENCES:
patent: 4097692 (1978-06-01), Felix
patent: 4106007 (1978-08-01), Johnston et al.
patent: 4218655 (1980-08-01), Johnston et al.
patent: 4300126 (1981-11-01), Gajjar

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