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Repeater coupler for power line communication systems

  • US 3,962,547 A
  • Filed: 05/27/1975
  • Issued: 06/08/1976
  • Est. Priority Date: 05/27/1975
  • Status: Expired due to Term
First Claim
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1. Apparatus for connecting separate transmitters of a power line communication system to the same power line, comprising:

  • a first transmitter having an output terminal, said output terminal being effectively maintained at ground potential when the first transmitter is not transmitting;

    a second transmitter having first and second output terminals;

    means for coupling signals to the power line;

    an interconnecting transformer having first and second windings, said first winding being connected across the output terminals of the second transmitter, and said second winding being connected between the output terminal of the first transmitter and the means for coupling signals to the power line; and

    means for limiting the voltage across said second winding.

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