Envelope-tracking is recommended or differential power amplifier

Envelope-tracking is recommended or differential power amplifier

  • CN 103,988,425 B
  • Filed: 10/04/2012
  • Issued: 08/30/2019
  • Est. Priority Date: 10/05/2011
  • Status: Active Grant
First Claim
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1. a kind of power amplifier apparatus, comprising:

  • First active device and the second active device, first active device and the second active device are for amplifying input signalIn-phase component and reverse phase part;

    First DC power supply network, first DC power supply be connected to the network first active device output section and modulator it is defeatedOut between portion;

    Second DC power supply network, second DC power supply are connected to the network output section and the modulator in second active deviceSame output section between;

    AndCombiner is exported, which is used to combine enlarged in-phase component and the reverse phase part of the input signal,Wherein, the modulator includes envelope-tracking power supply, which is used to generate modulated supply voltage, andAndWherein, first active device and second active device include the output amplifier of cascade amplifier grade, describedDevice further include;

    Third active device and the 4th active device, the third active device and the 4th active device form driving amplifier, useIn-phase component and reverse phase part in amplification pre-drive signal;

    Third inductance component and the 4th inductance component, the third inductance component and the 4th inductance component are connected in series in the thirdBetween the output section of active device and the output section of the 4th active device;

    Described in the modulator is used at the points of common connection of the third inductance component and the 4th inductance component provideModulated supply voltage;

    AndThe output section of the third active device and the output section of the 4th active device are to first active device and instituteIt states the second active device and input signal is provided.

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