A PRACTICAL SCHEME FOR ENVELOPE DELTA-SIGMA MODULATED (EDSM) MICROWAVE POWER AMPLIFIER

摘要

A delta-sigma modulated Class-E power amplifier is proposed and experimentally developed for high-efficiency linear applications. The essential idea is based on the envelope delta-sigma modulation (EDSM), which combines the Kahn technique, envelope elimination and restoration (EER), with the Delta-Sigma modulated-amplifier concept. The scheme increases the efficiency of the circuit by digitalizing the envelope of the signal instead of the original RF signal.