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Multimode amplifier for operation in linear and saturated modes

  • US 7,605,651 B2
  • Filed: 12/04/2007
  • Issued: 10/20/2009
  • Est. Priority Date: 01/25/2007
  • Status: Active Grant
First Claim
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1. A multimode power amplifier configured to receive an RF input signal and provide an RF output signal in linear and saturated operating modes, said multimode power amplifier comprising:

  • an output stage configured to receive a fixed supply voltage and to provide said RF output signal;

    at least one driver stage coupled to said output stage, said at least one driver stage configured to receive said RF input signal and an adjustable supply voltage;

    wherein said adjustable supply voltage controls an RF output power of said RF output signal when said multimode power amplifier is in said saturated operating mode; and

    wherein said adjustable supply voltage is controlled by a fixed control voltage when said multimode power amplifier is in said linear operating mode.

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