Efficiency and linearity improvement in power amplifiers for wireless communications

被引：18

作者：

Asbeck, P ^{[1
]}

Hanington, G ^{[1
]}

Chen, PF ^{[1
]}

Larson, L ^{[1
]}

机构：

[1] Univ Calif San Diego, La Jolla, CA 92093 USA

来源：

GAAS IC SYMPOSIUM - 20TH ANNUAL, TECHNICAL DIGEST 1998 | 1998年

关键词：

D O I：

10.1109/GAAS.1998.722610

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A key issue limiting power efficiency in wireless communication power amplifiers is the variation in signal level that must be accommodated. This paper discusses the importance of and techniques for varying the amplifier de current and power supply voltage as a function of signal level. A high speed de-de converter operating from a 3.3V source, implemented with GaAs HBTs, is described. The efficiency of a 2Ghz power amplifier using the de-de converter is shown to increase by 40%, averaged over signal power variations characteristic of IS-95 CDMA systems.

引用

页码：15 / 18

页数：4