半导体学报2009，Vol.30Issue(5)：65-71,7.DOI:10.1088/1674-4926/30/5/055002
Theoretical analysis and an improvement method of the bias effect on the linearity of RF linear power amplifiers
Theoretical analysis and an improvement method of the bias effect on the linearity of RF linear power amplifiers
Wu Tuo 1Chen Hongyi 1Qian Dahong2
作者信息
- 1. Institute of Microelectronics, Tsinghua University, Beijing 100084, China
- 2. Accel Semiconductor Corp, Shanghai 201203, China
- 折叠
摘要
Abstract
Based on the Gummel-Poon model of BJT, the change of the DC bias as a function of the AC input signal in RF linear power amplifiers is theoretically derived, so that the linearity of different DC bias circuits can be interpreted and compared. According to the analysis results, a quantitative adaptive DC bias circuit is proposed,which can improve the linearity and efficiency. From the simulation and test results, we draw conclusions on how to improve the design of linear power amplifier.关键词
bipolar/large-signal model/DC bias/linearity/adaptive biasKey words
bipolar/large-signal model/DC bias/linearity/adaptive bias分类
信息技术与安全科学引用本文复制引用
Wu Tuo,Chen Hongyi,Qian Dahong..Theoretical analysis and an improvement method of the bias effect on the linearity of RF linear power amplifiers[J].半导体学报,2009,30(5):65-71,7.
