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Current limiter for power line communication amplifier

  • US 4,645,956 A
  • Filed: 09/11/1984
  • Issued: 02/24/1987
  • Est. Priority Date: 09/11/1984
  • Status: Expired due to Fees
First Claim
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1. An apparatus for limiting an output current of a power amplifier which has a modified phase modulated signal at its input, comprising:

  • first means for providing a first signal, said first signal being representation of said output current;

    second means for providing a second signal, said second signal being representative of a reference magnitude;

    means for comparing said first signal and said second signal, said comparing means being configured to provide a third signal, said third signal being indicative of a first occurrence when said first signal exceeds said second signal; and

    means for altering a phase modulated signal as a function of said third signal, said altering means providing said modified phase modulated signal at an output which is connected as an input to said power amplifier, said altering means comprising an exclusive-OR gate having as its inputs said phase modulated signal and said third signal.

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