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Control of switcher regulated power amplifier modules

  • US 7,907,920 B2
  • Filed: 06/14/2007
  • Issued: 03/15/2011
  • Est. Priority Date: 06/14/2006
  • Status: Active Grant
First Claim
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1. A transmitter for a wireless communications device, wherein the transmitter comprises:

  • a power amplification block comprising;

    a pre-amplifier configured to amplify a transmission signal to produce a pre-amplified transmission signal; and

    a power amplifier coupled to the pre-amplifier and configured to amplify the pre-amplified transmission signal to produce an amplified transmission signal;

    a detector coupled to the output of the pre-amplifier and configured to provide a detected pre-amp output signal; and

    a power management block comprising;

    a switching regulator control block configured to generate a switching supply control signal by applying a switching control transfer function to the detected pre-amp output signal; and

    a switched mode power supply coupled to the switching regulator control block and configured to generate a supply voltage signal based on the switching supply control signal and provide the supply voltage signal to the power amplifier;

    wherein the switching control transfer function is derived based on a characterization of the response of the detector, control curves of the switched mode power supply, and a response of the power amplifier to input drive.

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