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Asymmetric Multilevel Outphasing Architecture For RF Amplifiers

  • US 20120176195A1
  • Filed: 03/19/2012
  • Published: 07/12/2012
  • Est. Priority Date: 11/11/2008
  • Status: Active Grant
First Claim
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1. A radio frequency circuit comprising:

  • a plurality of power amplifiers, each having at least one input port and an RF output port, wherein each power amplifier is configured to selectively provide an output signal having one of a plurality of discrete output amplitudes and an adjustable phase at its output port, at least two of the output signal amplitudes from different power amplifiers capable of being different ones of the plurality of discrete output amplitudes;

    an RF power combiner circuit having a plurality of input ports coupled to RF output ports of the plurality of power amplifiers and an output port at which is provided an output signal of the RF circuit; and

    a control system coupled to the at least one input port of each power amplifier and configured to control the output signal of the RF circuit by adjusting the phase and selecting the amplitudes of the output signals of said power amplifiers.

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