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Signal repeater for power distribution line communication systems

  • US 4,032,911 A
  • Filed: 02/26/1976
  • Issued: 06/28/1977
  • Est. Priority Date: 02/26/1976
  • Status: Expired due to Term
First Claim
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1. A signal repeater suitable for use with power distribution line communication systems, said repeater comprising:

  • a signal amplifier coupled to a power distribution line, said amplifier having a signal input line;

    first and second signal receivers coupled to the distribution line, said first receiver providing a first output signal when receiving a first predetermined signal from the distribution line and said second receiver providing a second output signal when receiving a second predetermined signal from the distribution line;

    first and second signal generators;

    a bistable latch circuit having first and second input terminals and first and second output terminals; and

    first and second transmission gates each having signal input, signal output, and control input lines, with the signal input lines of the first and second transmission gates respectively coupled to the first and second signal generators, with the signal output lines of the first and second transmission gates coupled to each other and to the signal input line of the signal amplifier, and with the control input lines of the first and second transmission gates respectively coupled to the first and second output terminals of the latch circuit;

    said first and second input terminals of said latch circuit being respectively coupled to the first and second receivers so that a first output signal from the first receiver sets the latch circuit in a condition which turns on the first transmission gate if the latch circuit has not already been set in a condition to turn on the second transmission gate.

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