An AC-Coupled Hybrid Envelope Modulator for HSUPA Transmitters with 80% Modulator Efficiency

📋 论文概要

本文提出了一种用于HSUPA发射机的AC耦合混合包络调制器，通过结合开关调制器和线性放大器，实现了80%的调制器效率。该设计解决了多输入电压调制器产生多个电源开销大的问题，有效提升了发射机的整体效率。

💡 主要创新点

• 提出AC耦合的混合包络调制器结构，将开关调制器与线性放大器结合，减少了多电源生成的开销。
• 通过优化的电路设计，在HSUPA信号下实现了80%的高调制器效率，优于传统方法。

🏷 关键词

📄 原文摘要

because of the fundamental correlation between data rate and transmit power. Furthermore, the high peak-to-average power ratio (PAPR) of the modulated signals causes a degradation in PA efficiency, since the supply voltage of the PA must be high enough to provide the peak output voltage without loss of linearity. Envelope tracking modulators have been proposed to improve the efficiency and linearity of transmitters. Modulators using multiple input voltages have been shown to improve efficiency, but generating multiple supplies imposes substantial overhead [1]. Several recent works have demonstrated a hybrid modulator, combining the output current of a buck output stage with that of a linear amplifier [2-6]. The hybrid modulator has the notable advantage that the low-frequency power (which constitutes the majority of pow

👥 作者与机构

Patrick Riehl1, Paul Fowers2, Hao-Ping Hong3, Michael Ashburn1

MediaTek, Woburn, MA, 2MediaTek, West Malling, United Kingdom, MediaTek, Hsinchu, Taiwan 1 3 High-data-rate wireless technologies such as HSUPA and LTE are power-hungry