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Power amplifier operated as an envelope digital to analog converter with digital pre-distortion

  • US 6,255,906 B1
  • Filed: 09/30/1999
  • Issued: 07/03/2001
  • Est. Priority Date: 09/30/1999
  • Status: Expired due to Term
First Claim
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1. A power amplifier that amplifies an electrical signal, the electrical signal having a magnitude that traverses a first path within the power amplifier to an antenna and a phase that traverses a second path within the power amplifier to the antenna, the power amplifier comprising:

  • a plurality of power amplifiers;

    a power supply that switches on at least one power amplifier within the plurality of power amplifiers;

    a logic circuitry coupled to the power supply that directs the switching on of the at least one power amplifier within the plurality of power amplifiers;

    a time delay compensation circuitry that substantially minimizes any time delay mismatch between the first path and the second path within the power amplifier;

    a pre-distortion circuitry that substantially compensates for any impedance mismatch created by any changes in the magnitude; and

    a look up table that stores a gain profile and a phase profile of at least one power amplifier of the plurality of power amplifiers.

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