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Composite amplifier with optimized linearity and efficiency

  • US 20040135630A1
  • Filed: 10/27/2003
  • Published: 07/15/2004
  • Est. Priority Date: 05/18/2001
  • Status: Active Grant
First Claim
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1. A linearization method for a composite amplifier (500;

  • 600;

    700) having at least two sub-amplifiers (510, 520;

    610, 620;

    710, 720), said method comprising the steps of;

    for at least one sub-amplifier;

    determining a sub-amplifier output signal based on a linear model of the output network of the composite amplifier; and

    emulating and compensating for, in the input signal to the sub-amplifier, a non-linear amplifier behavior based on a non-linear model of a sub-amplifier parasitic using the determined sub-amplifier output signal as input to the model.

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