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引用次数: 5
摘要
本文综述了CMOS技术中的功率放大器，包括传统功率放大器和数字功率放大器。dpa在PA中嵌入了上转换混频器和数模转换器(DAC)的功能。因此，dpa更合适的标签是rf - power - dac。“开关电容功率放大器”(SCPA)因其体积小，线性度高，效率高，具有改变未来通信网络的潜力而备受关注。由于SCPA(和其他dpa)可以在输出RF信号的同时直接与数字信号接口，因此它是一种灵活的混合信号接口电路，不需要大型基带滤波器。SCPA最近的几项创新使其能够跨多个频带进行数字重新配置，并用于波束成形/MIMO收发器。
The Switched-Capacitor Power Amplifier: A Key Enabler for Future Communications Systems
In this paper, power amplifiers in CMOS technologies are reviewed including traditional PAs and the digital power amplifier (DPA). DPAs embed the functionality of an up-conversion mixer and digital-to-analog converter (DAC) in the PA. Hence a more appropriate label for DPAs is RF-Power-DACs. The "Switched-Capacitor Power Amplifier" (SCPA) is highlighted due to its potential to transform future communications networks because of its small-size, high linearity, and high efficiency. Because the SCPA (and other DPAs) can directly interface with digital signals while outputting RF signals, it is a flexible mixed-signal interface circuit that does not require a large baseband filter. Several recent innovations in the SCPA that enable it to be reconfigured digitally across multiple frequency bands and to be used in beamforming/MIMO transceivers are highlighted.
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