A High-Performance Digital-Input Class-D Amplifier with Direct Battery Connection in a 90nm Digital CMOS Process

📋 论文概要

该论文提出了一种高性能数字输入D类放大器，采用直接电池连接方式，在90nm数字CMOS工艺中实现。通过直接数字PWM输入驱动功率放大器，消除了传统模拟电路（如DAC、前置放大器），从而减小芯片面积并提高效率。

💡 主要创新点

• 直接数字PWM输入驱动功率放大器，无需高精度模拟电路，大幅减小芯片面积。
• 采用直接电池连接，适用于移动和低功耗应用，提高电源效率。
• 在90nm数字CMOS工艺中实现，兼容数字工艺，降低制造成本。

🏷 关键词

📄 原文摘要

levels at high efficiencies, Class-D amplifiers are extremely attractive for systems-on-chip in mobile and low-power applications, where battery life and reduced thermal dissipation are crucial parameters. One modification of the general idea of Class-D amplifiers is to drive a power amplifier directly with a digital pulse-width modulated input [1]. This scheme is desirable since it greatly reduces the die area by eliminating high-precision analog circuits such as DACs, pre-amplifiers and programmable precision-gain amplifiers. The elimination of sensitive analog circuits in favor of digital PWM generation is especially more efficient in ultra-deep-submicron (UDSM) processes where analog components are noisier and less precise. The Class-D amplifier system presented in this

👥 作者与机构

Srinath Ramaswamy1, Jagadeesh Krishnan1, Brett Forejt1, Jomy Joy2,

Mark Burns1, Gangadhar Burra1 1 Texas Instruments, Dallas, TX, 2Texas Instruments, Bangalore, India Because they are capable of generating large output power