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Power amplifier

  • US 6,204,731 B1
  • Filed: 04/30/1999
  • Issued: 03/20/2001
  • Est. Priority Date: 12/05/1998
  • Status: Active Grant
First Claim
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1. A power amplifier having an input terminal for receiving an input signal to be amplified and an output terminal to which the amplified signal is passed, the power amplifier comprising a plurality of cascaded amplifier stages one of which comprises a plurality of amplifiers connected in parallel with their input ports interconnected and their output ports interconnected;

  • andsaid plurality of amplifiers connected in parallel defining at least a class AB amplifier and a class C amplifier, wherein if the power level of the input signal is below a predetermined input signal, then the class AB amplifier alone is operational and if the power level of the input signal transitions above the predetermined input signal, then both the class AB and class C amplifiers are operational.

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