Research on Static Biasing Point of Two Stage Power Amplifier
Zhou Dong-ping · China Integrated Circuit · 2008
In this paper, we analyze the influences of static biasing point to linearity and efficiency of different kinds of power amplifiers. By analyzing the characteristics of two-stage power amplifier, we find the best static biasing points which are the best trade-off between linearity and efficiency for two-stage power amplifier. By testing a commercial two-stage power amplifier used for W-CDMA handsets, the correctness of the conclusion is confirmed. We also extend this conclusion to multi-stage power amplifier, which is helpful to those who design power amplifiers.