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Circuit and method for I/Q modulation with independent, high efficiency amplitude modulation

  • US 6,194,963 B1
  • Filed: 11/18/1998
  • Issued: 02/27/2001
  • Est. Priority Date: 11/18/1998
  • Status: Expired due to Term
First Claim
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1. An RF amplifier comprising:

  • a phase modulator developing a phase modulated RF input signal to be transmitted, wherein the phase modulator has no amplitude modulation;

    a power amplifier receiving the RF input signal and amplifying the RF input signal to develop an RF output signal; and

    an amplifier control operatively associated with the phase modulator and the power amplifier, the amplifier control including means for developing a control signal representing a desired amplitude of the RF output signal, memory means storing correction information correlating actual amplitude of the RF output signal relative to the control signal and control means for varying the power amplifier supply voltage using the control signal modified responsive to the correction information to the desired amplitude.

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