A HIGH-EFFICIENCY LINEAR POWER-AMPLIFIER USING AN ENVELOPE FEEDBACK METHOD

被引：5
|
作者：
KOSUGI, H
MATSUMOTO, T
UWANO, T
ENOKI, T
机构：
[1] MATSUSHITA ELECT IND CO LTD,TELECOM RES LAB,YOKOHAMA,KANAGAWA 226,JAPAN
[2] MATSUSHITA ELECT IND CO LTD,DIV RES & DEV,KADOMA,OSAKA 571,JAPAN
来源：
ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS | 1994年 / 77卷 / 03期
关键词：
DIGITAL CELLULAR; POWER AMPLIFIER; LINEAR MODULATION; QPSK; AM/PM CONVERSION;
D O I：
10.1002/ecjb.4420770306
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：
This paper describes a high-efficiency linear power amplifier using an envelope feedback method for a digital cellular telephone. Adjacent channel interference due to the amplitude and phase distortions of the amplifier is analyzed for a pi/4-shift QPSK modulation scheme. From the analysis amplitude error compensation circuits are proposed and the limit of phase-shift variation caused by AM/PM conversion is discussed. The drain power efficiency of 50 percent at the low operation voltage of 5.8 V is achieved experimentally.
引用
收藏
页码：50 / 57
页数：8
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