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System for closed loop power control using a linear or a non-linear power amplifier

  • US 6,670,849 B1
  • Filed: 08/30/2000
  • Issued: 12/30/2003
  • Est. Priority Date: 08/30/2000
  • Status: Active Grant
First Claim
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1. A method for controlling output power from an amplifier using a closed power control feedback loop, comprising the steps of:

  • supplying a first modulated signal to a power amplifier;

    detecting a portion of an output of the power amplifier using a power detector in a closed power control feedback loop;

    adjusting the output power of the power amplifier based upon the detected portion of the output of the power amplifier and a reference signal; and

    injecting a second modulated signal into the feedback loop using a variable gain element, wherein the second modulated signal is an inverse of a desired second modulated signal.

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