带有可调匹配网络的数字控制扩音器

2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) Pub Date : 2012-11-01 DOI:10.1109/RFIT.2012.6401674

Fei Jia, Dong Huang, Shengxi Diao, Z. Fu, F. Lin

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引用次数: 3

摘要

采用65nm CMOS技术，实现了一种具有输出功率数字可控性的传感器网络AB类功率放大器。通过可调匹配网络改变工作单元数和调节负载，实现可编程输出功率，可显著提高回退效率。假场效应管用于中和，以增加反向隔离。测量结果表明，在1.2V电源下，峰值输出功率为3dBm, PAE为40%。与传统的数字控制扩音器相比，回退时的漏极效率(高于3dB)提高了10%以上。

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A digitally controlled PA with tunable matching network

A class AB power amplifier (PA) with output power digital controllability for WSNs is implemented in 65nm CMOS technology. The programmable output power is realized by altering the number of working cells and adjusting the load through a tunable matching network, which can increase the back-off efficiency significantly. Dummy FETs are used for neutralization to increase reverse isolation. The measurement results show a peak output power of 3dBm and a PAE of 40% with a 1.2V supply. Drain efficiency at back off (above 3dB) increases by more than 10%, comparing to traditional digital controlled PA.

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2012 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)

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