A Triple-Power-Mode Digital Polar CMOS RF Power Amplifier With LO Duty Cycle Control

被引：6
|
作者：
Choi, Hyunseok [1 ,2 ]
Lee, Dong-Ho [3 ]
Hong, Songcheol [1 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Elect Engn, Daejeon 305701, South Korea
[2] Qualcomm Technol Inc, Dept QCT RFIC Design, San Diego, CA 92121 USA
[3] Hanbat Natl Univ, Dept Informat & Commun Engn, Daejeon 305719, South Korea
来源：
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2016年 / 26卷 / 09期
基金：
新加坡国家研究基金会;
关键词：
CMOS RF power amplifier; digital polar power amplifier; high dynamic range; LO duty cycle control; transmit power control; triple power mode;
D O I：
10.1109/LMWC.2016.2597187
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 triple-power-mode digital polar CMOS power amplifier (DPA) with a high dynamic range is presented. The triple-power-mode to enhance the efficiency when operating under back-off power is facilitated by the combination of a switched output transformer to change the load impedance and a reduced duty cycle of the LO input signal of the DPA for additional back-off power. This static power-mode method for the low-power region can be used with a DPA which has a high dynamic range in conjunction with a digitally controlled bias generator. An improvement in the PAE from 14.5% to 28.7% is achieved at a back-off power of 6.5 dB from a peak output power of 21.54 dBm at 1.7 GHz. A digital transmit power control (TPC) range of 68.2 dB for WCDMA is realized without any external components.
引用
收藏
页码：702 / 704
页数：3
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