Method for forming information carrying signals in an electrical

Details Method for forming information carrying signals in an electrical Method for forming information carrying signals in an electrical

1985-02-01

1987-03-31

Caldwell, Sr., John W.

Communications: electrical

Systems

Selsyn type

375 37, H04M 1104

Patent

active

046546308

ABSTRACT:
A method for forming and transmitting information carrying signals in an electrical power distribution network is disclosed. A step-shaped current signal is produced by switching at least two purely ohmic loads between a pair of power lines. The ohmic loads are switched between the power lines in accordance with a predetermined sequence so that a current signal having the desired waveform results. The step-shaped information carrying signal usually has a frequency which is higher than the power transmission frequency of the supply network.

REFERENCES:
patent: 2688050 (1954-08-01), Harris
patent: 3017460 (1962-01-01), Alexander
patent: 3030619 (1962-04-01), Ostrov et al.
Electrical Times, vol. 157, No. 11, Mar. 12, 1970, (London, GB), by A. J. Baggott: "Data Transmission Over Distribution Systems", pp. 55-58.

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