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Average power tracking controller

  • US 9,280,163 B2
  • Filed: 01/23/2013
  • Issued: 03/08/2016
  • Est. Priority Date: 12/01/2011
  • Status: Active Grant
First Claim
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1. A radio frequency (RF) switching converter comprising:

  • a switching circuit operable to receive a power source voltage, the switching circuit being switchable so as to generate a pulsed output voltage from the power source voltage;

    an RF filter coupled to receive the pulsed output voltage from the switching circuit and operable to convert the pulsed output voltage from the switching circuit into a supply voltage having a supply voltage level with a ripple variation;

    a bang-bang controller (BBC) operable to receive an Average Power Tracking (APT) signal and configured to switch the switching circuit based on an APT signal level of the APT signal so that the switching circuit generates the pulsed output voltage and so that the supply voltage level of the supply voltage has an average DC supply voltage level set in accordance with a DC offset signal level of the APT signal; and

    an APT controller operable to receive a supply control input signal having a supply control input signal level, the APT controller being configured to;

    generate the APT signal such that the APT signal level varies from the DC offset signal level of the APT signal in accordance with the ripple variation of the supply voltage level of the supply voltage; and

    set the DC offset signal level of the APT signal in accordance with the supply control input signal level of the supply control input signal.

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