Linearity Improvement Techniques for CMOS Switched-Capacitor Power Amplifiers

被引：0

作者：

Kayyil, Ajmal Vadakkan ^{[1
]}

Qiao, Bo ^{[1
]}

Allstot, David J. ^{[1
]}

机构：

[1] Oregon State Univ, Sch EECS, Corvallis, OR 97331 USA

来源：

2021 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS) | 2021年

关键词：

Switched-capacitor power amplifier (SCPA); digital transmitter; linearity; error vector magnitude (EVM); switched-capacitor circuits;

D O I：

10.1109/ISCAS51556.2021.9401494

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：

The CMOS switched-capacitor power amplifier (SCPA) architecture was disclosed by S.M. Yoo, et al., in 2011 [1]-[2]. It enabled the design of fully-integrated radio frequency (RF) transmitters with much higher power-added efficiency (PAE) than previous approaches. Herein, new techniques are introduced that also increase SCPA linearity. Specifically, a new switching scheme decreases the amplitude modulation to phase modulation (AM-PM) distortion. When applied to class-G SCPAs [3]-[4], the linearity using the new switching scheme is improved significantly compared to conventional SCPA implementations. More specifically, the AM-PM non-linearity of the class-G SCPA is reduced by about similar to 4X and the error vector magnitude (EVM) is improved by similar to 3 dB.

引用

页数：5

共 6 条

[1]

Sang-Min Yoo, 2012, 2012 IEEE Radio Frequency Integrated Circuits Symposium (RFIC), P233, DOI 10.1109/RFIC.2012.6242271

[2]

Sang-Min Yoo, 2011, 2011 IEEE International Solid-State Circuits Conference (ISSCC 2011), P428, DOI 10.1109/ISSCC.2011.5746382

[3] A Class-G Supply Modulator and Class-E PA in 130 nm CMOS [J].

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Taylor, Stewart S. ;

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IEEE JOURNAL OF SOLID-STATE CIRCUITS, 2009, 44 (09) :2339-2347

[4]

Yoo S.-W., IEEE INT SOL STAT CI, P184

[5] A Class-G Switched-Capacitor RF Power Amplifier [J].

Yoo, Sang-Min ;

Walling, Jeffrey S. ;

Degani, Ofir ;

Jann, Benjamin ;

Sadhwani, Ram ;

Rudell, Jacques C. ;

Allstot, David J. .

IEEE JOURNAL OF SOLID-STATE CIRCUITS, 2013, 48 (05) :1212-1224

[6] A Switched-Capacitor RF Power Amplifier [J].

Yoo, Sang-Min ;

Walling, Jeffrey S. ;

Woo, Eum Chan ;

Jann, Benjamin ;

Allstot, David J. .

IEEE JOURNAL OF SOLID-STATE CIRCUITS, 2011, 46 (12) :2977-2987

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