| 一种低成本无滤波器D类音频放大器的实现 |
| |
| 引用本文： | 郑浩,刘岩. 一种低成本无滤波器D类音频放大器的实现[J]. 电子技术应用, 2008, 34(7) |
| |
| 作者姓名： | 郑浩 刘岩 |
| |
| 作者单位： | 第二炮兵工程学院,陕西,西安,710025;第二炮兵工程学院,陕西,西安,710025 |
| |
| 摘 要： | 介绍了一种低成本应用于音频D类放大器,无需外接滤波器,放大器采用全差分电路,利用脉宽调制方法去除了输出滤波器,电路可以工作在2.5V～5V电源电压下,电路采用6V CSMC0.5μm DPTM工艺,利用MATLAB和Hspice工具仿真,放大器接8Ω的负载,电源电压为3.6V,在高保真音频范围内(20Hz～20kHz),转换效率可以达到88%,连续平均功率0.1W时,其THD+N小于0.06%。
|
| 关 键 词： | D类放大器 无滤波 THD 反馈环路 |
Low cost implementation of fiherless class D audio amplifier |
| |
| ZHENG Hao,LIU Yan. Low cost implementation of fiherless class D audio amplifier[J]. Application of Electronic Technique, 2008, 34(7) |
| |
| Authors: | ZHENG Hao LIU Yan |
| |
| Affiliation: | ZHENG Hao LIU Yan (The Second Artillery Engineering College,Xi'an 710025,China) |
| |
| Abstract: | This paper presents a low-cost class-D audio amplifier with no filter,the amplifier uses the fully differential schematic and a pulse width modulation scheme that eliminate the output filter.It operates with a 2.5V to 5V supply voltage in a 6V,CSMC 0.51μm,double-poly,triple-metal,CMOS process.Using MATLAB and Hspice simulating tools,the proposed Class-D audio amplifier with a maximum power efficiency of 88% is capable of delivering up to 0.1W of continuous average power into an 8Ω load and less than 0.06% total harmonic distortion plus noise from a 3.6V power supply in the high fidelity range(20Hz～20kHz). |
| |
| Keywords: | THD |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
