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Monolithic supply-modulated RF power amplifier and DC-DC power converter IC

  • US 7,372,333 B2
  • Filed: 02/03/2004
  • Issued: 05/13/2008
  • Est. Priority Date: 02/03/2003
  • Status: Active Grant
First Claim
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1. A RF power amplifier configured to receive an RF input signal, comprising:

  • a switched-mode power amplifier supplied by a synchronous buck DC-DC power supply;

    a controller configured to control the power supplied by the synchronous buck DC-DC power supply;

    wherein the controller is connected to a feedback loop that is configured to provide the controller with a signal capable of being used by the controller to adjust the level of the voltage supplied by the synchronous buck DC-DC power supply in response to variations in the envelope of the RF input signal; and

    wherein the RF input signal is provided to the input of the switched-mode power amplifier via a limiter, which limits the variation in the level of the RF input signal; and

    the limiter provides the limited RF input signal to a resonant gate drive that is connected to the input of the switched-mode power amplifier.

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