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Power amplifier including variable capacitor circuit

  • US 8,680,928 B2
  • Filed: 03/29/2012
  • Issued: 03/25/2014
  • Est. Priority Date: 03/29/2012
  • Status: Active Grant
First Claim
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1. A power amplifier, comprising:

  • a first amplification stage configured to amplify a radio frequency (RF) input signal; and

    a second amplification stage comprising at least one transistor configured to amplify an output of the first amplification stage and at least one variable capacitor circuit, connected between a gate of the at least one transistor and a first power supply voltage, and configured to have a capacitance that varies in response to amplitude of the output of the first amplification stage to function as a linearizer for the power amplifier.

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