Class-G Headphone Driver in 65nm CMOS Technology

📋 论文概要

该论文提出了一种采用65nm CMOS工艺的Class-G耳机驱动器，旨在平衡Class-D的高效率与Class-AB的高音频质量，同时避免开关噪声干扰射频功能。通过优化电源电压切换策略，实现了低功耗和高保真音频输出。

💡 主要创新点

• 提出了一种适用于耳机应用的Class-G架构，结合了Class-D的效率优势和Class-AB的低噪声特性。
• 在65nm CMOS工艺下实现了高效的电源管理，通过动态切换供电电压降低功耗。

🏷 关键词

📄 原文摘要

and DMB reception. The users may wish to use these features for many hours and a low efficiency amplifier could deplete the battery in a short time. There are two classes of power amplifiers usually used for this application: Class-D and Class-AB. Class-D architectures provide the benefit of power efficiency at the cost of slightly reduced performance and a level of switching noise, which might, in some cases, interfere with RF functions such as mobile phone, GPS or FM radio reception. Class AB architecture has the benefit of higher audio quality and doesn’t produce any switching noise, but its power efficiency is much lower. Notwithstanding their lower efficiency, the great majority of the headphone drivers in commerce operate in Class AB. A Class G is a high-efficiency analog amplifier without EMI problems that tries to bring together the best of Class

👥 作者与机构

Alex Lollio1, Giacomino Bollati2, Rinaldo Castello1, 1

University of Pavia, Pavia, Italy Marvell, Pavia, Italy 2 Modern cellular phones incorporate hands-free operation, MP3 music playback