Muhammad Hassan, M. Kwak, V. Leung, C. Hsia, Jonmei J. Yan, D. Kimball, L. Larson, P. Asbeck
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引用次数: 33
摘要
提出了一种低静态功率的高效宽带包络跟踪功率放大器。CMOS包络放大器采用线性放大器和开关放大器相结合的方式，实现了高效率和更宽的带宽。采用具有低直流功耗的源交叉耦合线性放大器来降低包络放大器的静态功率。测量结果表明，在输出功率为1W、2.5 GHz、6.0 dB PAPR的20 MHz LTE信号下，包络跟踪功率放大器的功率增加效率为45%。
High efficiency envelope tracking power amplifier with very low quiescent power for 20 MHz LTE
A high efficiency wideband envelope tracking power amplifier with low quiescent power is presented. The CMOS envelope amplifier has a combined linear amplifier and switching amplifier to achieve high efficiency and wider bandwidth. Quiescent power of the envelope amplifier is reduced using a source cross-coupled linear amplifier with inherently low DC power dissipation. Measurements show a power added efficiency of 45% for the envelope tracking power amplifier for 20 MHz LTE signal with 6.0 dB PAPR at 2.5 GHz at 1W output power.
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