Communications: electrical – Systems – Selsyn type
Patent
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
Cohen Harry A.
Hendrickson Max
Palsgrove Boyd H.
Grayson George
Honeywell Inc.
Olms Douglas W.
Rokoff Kenneth I.
Solakian John S.
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