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Dual voltage regulator for a supply voltage controlled power amplifier in a closed power control loop

  • US 7,499,682 B2
  • Filed: 05/24/2005
  • Issued: 03/03/2009
  • Est. Priority Date: 05/24/2005
  • Status: Active Grant
First Claim
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1. A method for dynamically controlling the power output of a power amplifier, comprising:

  • providing a radio frequency (RF) signal to a power amplifier;

    generating a power control signal in a closed power control loop;

    providing the power control signal to a switching voltage regulator and a linear voltage regulator;

    using the power control signal to dynamically control the switching voltage regulator and the linear voltage regular, wherein the power control signal provides fine control of the output of the linear voltage regulator;

    filtering voltage ripple at an output of the switching voltage regulator;

    controlling the filtering using the power control signal, wherein the closed power control loop minimizes noise generated by the switching voltage regulator.

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