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Amplifier arrangement

  • US 6,819,171 B2
  • Filed: 11/26/2002
  • Issued: 11/16/2004
  • Est. Priority Date: 02/08/2000
  • Status: Expired due to Fees
First Claim
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1. Apparatus for amplifying an amplitude and phase/frequency modulated input signal to produce an output signal, comprising:

  • a splitter adapted to provide the input signal to at least one selectable amplifier and to an additional amplifier, a respective switch for each selectable amplifier, a detector adapted to detect the envelope of the input signal prior to amplification by any of the selectable and additional amplifiers, a controller adapted to control the operation of the switch or switches according to the envelope of the input signal, and a combiner adapted to combine the amplifier outputs, wherein;

    the additional amplifier is always connected to the splitter for receiving the input signal and each selectable amplifier is connected to the splitter for receiving the input signal via its respective switch.

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