Patent ID: 6795712
Filing Date: 2004-09-21
Classification: H03F,H03G

Abstract:
A system for closed loop power control in a phase and amplitude modulated transmission environment, comprising:a first amplifier configured to amplify a first modulated signal and a second modulated signal; an upconverter configured to upconvert the first modulated signal and the second modulated signal to form a combined modulated signal; a second amplifier configured to amplify the combined modulated signal; a power amplifier configured to amplify the combined modulated signal; a power detector located in a closed power control feedback loop, the power detector configured to detect a portion of an output of the power amplifier; a comparator configured to adjust the output power of the first amplifier and the second amplifier based upon the difference between the detected portion of the output of the power amplifier and a reference signal; and a variable gain element configured to inject an inverse of the second modulated signal into the feedback loop.