A CMOS Dual-Switching Power-Supply Modulator with 8% Efficiency Improvement for 20MHz LTE Envelope Tracking RF Power Amplifiers

📋 论文概要

该论文提出了一种CMOS双开关电源调制器，用于20MHz LTE包络跟踪射频功率放大器，通过优化调制器拓扑实现了8%的效率提升。解决了宽带宽和高效率电源调制器设计的挑战。

💡 主要创新点

• 提出双开关结构混合调制器，结合线性放大器和开关转换器，提高整体效率。
• 针对20MHz LTE信号的高峰均比，优化了调制器带宽和功率损耗。

🏷 关键词

📄 原文摘要

2 University of California, San Diego, La Jolla, CA, Brown University, Providence, RI 1 2 Envelope Tracking (ET) is an efficiency enhancement technique where the power supply of a linear RF power amplifier (PA) follows the envelope of the RF signal. It is specifically effective for the high peak-to-average power ratio (PAPR) signals of modern communication systems. But due to envelope bandwidth expansion and watt-level power requirements, the design of wide bandwidth and high efficiency power supply modulators remains one of the most challenging aspects of ET systems. A hybrid modulator topology, combining both linear and switching amplifiers, has been extensively investigated for wideband operation [1-4], where a wideband linear amplifier operates in parallel with a high efficiency switching amplifier. However, the efficiency has been limited to roughly 70% (for wideband signals such as LTE) with this topology, since the relatively inefficient linear amplifier provides a large porti

👥 作者与机构

Muhammad Hassan , Peter M. Asbeck , Lawrence E. Larson, 1