Apparatus for receiving low level digital signals transmitted ov

Details Apparatus for receiving low level digital signals transmitted ov Apparatus for receiving low level digital signals transmitted ov

1983-12-19

1986-12-30

Olms, Douglas W.

Communications: electrical

Systems

Selsyn type

375 88, H04B 354

Patent

active

046332189

ABSTRACT:
Digital data is transmitted over AC power lines at typically a 300 baud rate and at a frequency of 130 kilohertz representing a binary ONE and 131 kilohertz representing a binary ZERO. Apparatus in the receiver relay including a quadrature detector converts the high frequency signals to digital binary signals which are applied to a microprocessor. The microprocessor generates signals to control relays in accordance with the information received from the AC power lines.

REFERENCES:
patent: 2605359 (1952-07-01), Madsen
patent: 2909606 (1959-10-01), Wennemer
patent: 4065722 (1977-12-01), Francis
patent: 4174517 (1979-11-01), Mandel

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