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Amplifying apparatus

  • US 20050141640A1
  • Filed: 11/24/2004
  • Published: 06/30/2005
  • Est. Priority Date: 05/31/2002
  • Status: Active Grant
First Claim
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1. An amplifying apparatus comprising:

  • two amplifiers for receiving input signals in common and for outputting their respective amplified signals;

    a combiner for combining the output signals of the two amplifiers and for outputting a combined signal;

    a predistortion unit for determining a distortion compensation component based on the output signal of the combiner and for predistorting the input signal based on the determined distortion compensation component; and

    a gain control unit for attenuating the input signals to set lower than in the steady state by reducing the gain lower than a steady value in the transition from the state where both of the amplifiers operate to the state where either of the amplifiers operates, or in the transition from the state where either of the amplifiers operates to the state where both of the amplifiers operate, or at the time of removal of either of the amplifiers, or at the time of attachment of the removed amplifier.

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