Power amplifier chain implementing a sigma-delta modulator with digital predistortion feedback

摘要

The invention concerns a power amplifier chain (302, 306, 308, 310) aimed to feed a power amplifier (312) with a digital signal (303) generated by sigma-delta modulation means (102) associated with control means (314) based on a model of the power amplifier (312) in order to determine a control signal (307) controlling said sigma-delta modulation means and compensate a quantification treatment of said digital signal (303) by a quantizer (306), characterized in that it comprises control means (314) to operate a feedback loop on the sigma-delta modulation means (312) based on the signal (303) transmitted by the sigma-delta modulations means.