Multiple Supply (Class-G) Linear Modulator and PA for Non-CE Modulation

摘要

A class-G PA consisting of a class-E PA and class-G supply modulator is fabricated in a 130nm process. It operates from 1.65 and 3.3V supplies and the die area is 2×2mm. It achieves a measured Pout of 29.2dBm with a PAE of 72%. It can amplify signals with peak-to-average ratios of ～3-20dBm, or act as power control for constant envelope signals. It achieves an EVM value of 4.6%-rms for a root-raised cosine filtered, QPSK modulated signal similar to that specified in the WCDMA standard (Data rate=3.84MB/s) and an average efficiency of 45%, compared to 17% for a similar class-B PA.