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Multiple step switched translation loop for power amplifier feedback control

  • US 6,792,282 B1
  • Filed: 09/21/2000
  • Issued: 09/14/2004
  • Est. Priority Date: 09/21/2000
  • Status: Active Grant
First Claim
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1. A method for using a translation loop modulator and power amplifier in a phase and amplitude modulated transmission environment, comprising the steps of:

  • providing a phase modulated signal to a translation loop, the translation loop providing a frequency specific phase modulated signal, the translation loop also having a phase locked loop;

    providing said frequency specific phase modulated signal to a power amplifier;

    providing an amplitude modulated signal to the power amplifier using a variable gain element associated with a control loop;

    detecting a portion of an output of the translation loop and a portion of an output power of the power amplifier;

    applying the detected output portion of the translation loop to an input of the translation loop during a first time period; and

    applying the detected output power portion of the power amplifier to the input of the translation loop modulator during a second time period, wherein the detected output power portion of the power amplifier that is supplied during the second time period is a substantially constant power level signal containing only phase information.

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