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Reducing effects of RF mixer-based artifact using pre-distortion of an envelope power supply signal

  • US 9,197,256 B2
  • Filed: 10/08/2013
  • Issued: 11/24/2015
  • Est. Priority Date: 10/08/2012
  • Status: Active Grant
First Claim
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1. Circuitry comprising:

  • A radio frequency (RF) power amplifier (PA) configured to receive and amplify an RF input signal to provide an RF transmit signal using an envelope power supply signal, which at least partially envelope tracks the RF transmit signal, wherein the RF input signal has a desired frequency content and an RF mixer-based artifact that includes an image of the desired frequency content; and

    an envelope tracking power supply configured to provide the envelope power supply signal, which includes mixer-based artifact pre-distortion to at least partially remove effects of the RF mixer-based artifact from the RF transmit signal.

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