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Multi-mode amplifier system

  • US 7,043,213 B2
  • Filed: 06/24/2003
  • Issued: 05/09/2006
  • Est. Priority Date: 06/24/2003
  • Status: Active Grant
First Claim
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1. An amplifier system comprising:

  • a power amplifier operative to amplify an input signal, the power amplifier having an input terminal and a supply terminal, the power amplifier being a linear class type amplifier that operates as a constant class amplifier; and

    a mode selector that controls the operation of the amplifier system between an envelope tracking mode, a polar mode and a linear mode by providing a selected amplifier input to the input terminal and a selected amplifier supply signal to the supply terminal based on a characteristic of the input signal.

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