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Gain Control for Linear Radio Freqency Power Amplifiers

  • US 20100007414A1
  • Filed: 07/08/2009
  • Published: 01/14/2010
  • Est. Priority Date: 07/08/2008
  • Status: Active Grant
First Claim
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1. A bias control circuit comprising:

  • an input port for receiving a signal indicative of an amplitude of a supply voltage, the supply voltage for being provided to a multi stage power amplifier circuit;

    electronic circuitry electrically coupled to the input port, the electronic circuitry for generating, in dependence upon the signal indicative of a supply voltage, a bias control signal for provision to a first stage power amplifier of the multi stage power amplifier circuit, the bias control signal being generated such that a gain change of the multi stage power amplifier circuit due to a supply voltage change is substantially compensated; and

    ,an output port electrically coupled to the electronic circuitry, the output port for being electrically coupled to a bias port of the first stage power amplifier and for providing the bias control signal thereto.

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