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Pseudo-envelope following power management system

  • US 8,493,141 B2
  • Filed: 04/19/2011
  • Issued: 07/23/2013
  • Est. Priority Date: 04/19/2010
  • Status: Active Grant
First Claim
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1. A power management system for an RF power amplifier comprising:

  • a parallel amplifier including a supply input configured to receive a direct current input voltage and an amplifier in communication with a power amplifier supply voltage; and

    a multi-level charge pump buck converter including a supply input configured to receive the direct current input voltage and a switching voltage output in communication with the power amplifier supply voltage, wherein the multi-level charge pump buck converter is configured to shunt the switching voltage output to ground in a first operational state, provide the direct current input voltage to the switching voltage output in a second operational state, provide 1.5 times the direct current input voltage to the switching voltage output in a third operational state, and provide 2 times the direct current input voltage to the switching voltage output in a fourth operational state.

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