Efficiency Analysis of a Switched-Capacitor Quadrature Power Amplifier Employing RF Pulse-Width-Modulation

被引：0
|
作者：
Kang, Heechai [1 ]
Kim, Ki Yong [1 ]
Gharpurey, Ranjit [1 ]
机构：
[1] Univ Texas Austin, Austin, TX 78712 USA
来源：
PROCEEDINGS OF THE 2020 IEEE TEXAS SYMPOSIUM ON WIRELESS AND MICROWAVE CIRCUITS AND SYSTEMS (WMCS) | 2020年
基金：
美国国家科学基金会;
关键词：
RF-PWM; Switched Capacitor; Power Amplifier; IQ Combiner; Outphasing;
D O I：
10.1109/wmcs49442.2020.9172410
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
Amplitude variation in a switched-capacitor Cartesian quadrature class-D PA can be achieved by scaling capacitor ratios or by employing pulse-width modulated signals to drive the class-D stages. The second approach allows for continuous amplitude control, thus avoiding the quantization noise that can result from discrete amplitude variation. The efficiency of the PWM class-D stage is analyzed in this paper. A brief comparison with discrete switched-capacitor-based amplitude control is presented.
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页数：4
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