| 双模式控制的防失真D类音频功率放大器 |
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| 引用本文： | 樊卫东,夏晓娟,方玉明,吉新村,郭宇锋.双模式控制的防失真D类音频功率放大器[J].南京邮电大学学报(自然科学版),2014,34(5):129-134. |
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| 作者姓名： | 樊卫东 夏晓娟 方玉明 吉新村 郭宇锋 |
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| 作者单位： | 南京邮电大学电子科学与工程学院,江苏南京210023;南京邮电大学江苏省射频集成与微组装工程实验室,江苏南京210023 |
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| 基金项目： | 国家自然科学基金，江苏省自然科学基金 |
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| 摘 要： | 设计了一款具有双模式控制、防失真功能、超低EMI、无需滤波器、5W高效率的单声道D类音频功率放大器.通过检测输出信号的失真来动态调整系统增益可实现独特的防失真功能,可以通过硬件或者软件设置使该放大器工作在防失真模式或者普通模式.电路采用CSMC的0.35 um的CMOS工艺实现,在输入信号为O～1.2V的范围内,输出信号能够保持良好的波形形状.可应用于各种便携式电子设备,如手机、平板电脑和便携式电视机等.
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| 关 键 词： | D类音频功率放大器 防失真 硬件设置 软件设置 自动调节 |
Class D Audio Power Amplifier with Dual-mode Control and Anti-distortion Function |
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| FAN Wei-dong,XIA Xiao-juan,FANG Yu-ming,JI Xin-cun,GUO Yu-feng.Class D Audio Power Amplifier with Dual-mode Control and Anti-distortion Function[J].Journal of Nanjing University of Posts and Telecommunications,2014,34(5):129-134. |
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| Authors: | FAN Wei-dong XIA Xiao-juan FANG Yu-ming JI Xin-cun GUO Yu-feng |
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| Institution: | FAN Wei-dong, XIA Xiao-juan, FANG Yu-ming, JI Xin-cun, GUO Yu-feng (1. College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China 2. Jiangsu Province Engineering Lab of RF integration ＆ micropackage, Nanjing University of Posts and Telecommunications, Nanjing 210023, China) |
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| Abstract: | A 5W high-efficiency Class D audio power amplifier with a dual mode control, anti-distortion function, ultra-low EMI and without filter is presented. The unique anti-distortion function is achieved by detecting the output distortion signal to dynamically adjust the system gain. The amplifier can he set in the anti-distortion mode or the normal mode by hardware or software in practice. The designed circuit is implemented by CSMC 0.35urn CMOS process. When the input signal is in the range of 0-1.2V,the output signal can keep good shape waveform. The amplifier can be applied to a variety of portable electronic devices, such as mobile phones, tablet computers, and portable televisions, etc. |
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| Keywords: | class D audio power amplifier anti-distortion hardware setting software setting automatic gain control |
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