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Dynamic error vector magnitude duty cycle correction

  • US 10,236,829 B2
  • Filed: 10/19/2017
  • Issued: 03/19/2019
  • Est. Priority Date: 09/19/2013
  • Status: Active Grant
First Claim
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1. A method of biasing a power amplifier arranged to amplify a radio frequency signal, the method comprising:

  • low pass filtering an indication of duty cycle of the power amplifier to generate a correction signal, the indication of duty cycle being a binary signal;

    generating a bias signal based at least partly on the correction signal; and

    biasing the power amplifier with the bias signal so as to compensate for variation in gain of the power amplifier due to a change in the duty cycle of the power amplifier.

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