Multimode 2.4 GHz CMOS Power Amplifier with Gain Control for Efficiency Enhancement at Power Backoff

被引:0
|
作者
Santos, E. L. [1 ,2 ]
Leite, B. [1 ]
Mariano, A. [1 ]
机构
[1] Fed Univ Parana UFPR, Grp Integrated Circuits & Syst, Curitiba, Parana, Brazil
[2] SENAI, Curitiba, Parana, Brazil
来源
2015 IEEE 6TH LATIN AMERICAN SYMPOSIUM ON CIRCUITS & SYSTEMS (LASCAS) | 2015年
关键词
CMOS; power amplifier (PA); variable gain; discrete power control;
D O I
暂无
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
In this paper, a power amplifier (PA) with gain control is presented for 2.4 GHz applications. The power gain can be digitally controlled in six steps by the combination of three bits. This technique was used to control power gain and to achieve an improvement in efficiency at power backoff. The design was implemented using a 0.13 mu m CMOS technology and is able to deliver a variable power gain between 26.5 dB and 35.9 dB and a peak power-added efficiency (PAE) of 38 % with a 1.8 V power supply. The power consumption of the PA is reduced from 225 mW in the highest-gain mode to 179 mW for the lowest-gain, allowing an enhanced efficiency when maximum gain is not required for transmission.
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页数:4
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