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Management of internal signal levels and control of the net gain for a linc amplifier

  • US 20020047745A1
  • Filed: 06/21/2001
  • Published: 04/25/2002
  • Est. Priority Date: 06/22/2000
  • Status: Active Grant
First Claim
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1. A linear amplifier comprising:

  • an amplifier subsystem having a modulator to generate a pair of constant- amplitude phase-modulated components in response to an input signal, a pair of channels which include a pair of power amplifiers coupled to amplify the components, respectively, a combiner coupled to combine the amplified components, and a plurality of variable gain elements coupled into some of a plurality of signal paths of the amplifier subsystem; and

    a controller coupled to receive feedback from the amplifier subsystem and in response (1) maintain signal levels of some of the plurality of signal paths in predefined ranges and (2) control a net gain of the linear amplifier, by adjusting the plurality of variable gain elements.

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