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Dynamic bias for RF power amplifiers

  • US 20010041547A1
  • Filed: 02/01/2001
  • Published: 11/15/2001
  • Est. Priority Date: 03/29/2000
  • Status: Active Grant
First Claim
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1. A system for dynamically biasing an RF power amplifier which amplifies a communication signal, having a first signal input for receiving the communication signal, a signal output and a bias input;

  • the system comprising;

    a detector, for receiving said communication signal and removing modulation components from said communication signal to provide a detector output signal;

    a second signal input for providing a TPC signal;

    a converter, coupled to said detector and said second signal input, said converter for processing said TPC signal and said detector output signal to generate a current signal; and

    a current mirror for receiving said current signal and feedback from said signal output and for comparing said current signal with said feedback to produce a bias signal;

    whereby said bias input receives said bias signal and dynamically adjusts the bias point of said amplifier.

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