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Receiver for a distribution network power line carrier communication system

  • US 4,355,303 A
  • Filed: 04/09/1981
  • Issued: 10/19/1982
  • Est. Priority Date: 04/09/1981
  • Status: Expired due to Term
First Claim
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1. A receiver for receiving a carrier signal modulated by an information signal which is transmitted over a distribution network power line carrier communication system comprising:

  • coupling means for providing a first signal in response to the carrier signal;

    first amplifier means responsive to said coupling means for providing a second signal in response to said first signal, said first amplifier means including first feedback means for determining a gain of said first amplifier means;

    means for producing a first and a second reference DC voltages;

    first comparator means responsive to said first reference DC voltage and to said second signal;

    second comparator means responsive to both said second reference DC voltage and to said second signal;

    variable control means responsive to said first and said second comparator means, said variable control means cooperating with said first feedback means such that said gain of said first amplifier means is varied in response to the magnitude of said second signal;

    high amplitude clipper means responsive to said second signal for providing a third signal;

    second amplifier means responsive to said third signal for providing a fourth signal;

    low amplitude clipper means responsive to said fourth signal for providing a sinusoidal clipped signal;

    hard limiter means responsive to said sinusoidal clipped signal for providing a square wave signal; and

    demodulator means responsive to said square wave signal for separating the information signal from the carrier signal.

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