Analysis and implementation of derivative superposition for a power amplifier driver  

作　　者：李一雷 韩科峰 闫娜 谈熙 闵昊 

机构地区：[1]ASIC&System State Key Laboratory,Fudan University,Shanghai 201203,China

出　　处：《Journal of Semiconductors》2012年第4期81-88,共8页半导体学报（英文版）

基　　金：Project supported by the Important National Science and Technology Specific Projects of China(Nos.2009ZX01031-003-002, 2010ZX03001-004);the National High Technology Research and Development Program of China(No.2009AA011605)

摘　　要：A new expression is proposed to analyze the linearization effectiveness of derivative superposition （DS） with large and small signal inputs, and different optimization methods of DS are found for different input magni tudes. A power amplifier driver （PAD） with largesignal optimized DS was implemented in 0.13/,m technology within a reconfigurable RF transmitter. The PAD is compatible with the GSM band at 900 MHz and the WCDMA band at 1.95 GHz, and it has a gain range of 44 dB with a step of 2 dB. Measurement results show that the over all OIP3 of the transmitter is better than 19 dBm, and the output referred 1dB compression point is better than 7.5 dBm.A new expression is proposed to analyze the linearization effectiveness of derivative superposition （DS） with large and small signal inputs, and different optimization methods of DS are found for different input magni tudes. A power amplifier driver （PAD） with largesignal optimized DS was implemented in 0.13/,m technology within a reconfigurable RF transmitter. The PAD is compatible with the GSM band at 900 MHz and the WCDMA band at 1.95 GHz, and it has a gain range of 44 dB with a step of 2 dB. Measurement results show that the over all OIP3 of the transmitter is better than 19 dBm, and the output referred 1dB compression point is better than 7.5 dBm.

关 键 词：AMPLIFIER LINEARITY derivative superposition 

分 类 号：TN722.75[电子电信—电路与系统] TM383.6[电气工程—电机]