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| 微控制器PWM接口实现高分辨率D/A 转换器方法研究 | |
| 引用本文： | 吴桂清,李泓霖,戴瑜兴,郑宗伟.微控制器PWM接口实现高分辨率D/A 转换器方法研究[J].电子学报,2012,40(8):1631-1634. |
| 作者姓名： | 吴桂清 李泓霖 戴瑜兴 郑宗伟 |
| 作者单位： | 1. 湖南大学电气与信息工程学院,湖南长沙,410082 2. 湖南大学电气与信息工程学院,湖南长沙,410082;温州大学物理与电子信息工程学院,浙江温州325035 3. 温州大学物理与电子信息工程学院,浙江温州,325035 |
| 基金项目： | 广东省教育部产学研结合(No.2010B090400213) |
| 摘 要： | 本文针对嵌入式应用中PWM (Pulse-Width Modulation)方式DAC(Digital-to-Analog Converter)和独立DAC芯片选择问题,提出了通过插值方式和多PWM组合方式提高PWM方式DAC分辨率的方法；分析了PWM信号频谱,提出了模拟滤波器设计原则与方法.以MCU(Micro Control Unit)的PWM通道方式实现DAC,经过数据分析证明此方法稳定可靠. |
| 关 键 词： | 数模转换器 过采样技术 脉冲宽度调制 分辨率 微控制器 |
| 收稿时间： | 2011-09-03 |
Implementation Method of High-Resolution DAC Using the MCU′s PWM Interfaces |
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| WU Gui-qing , LI Hong-lin , DAI Yu-xing , ZHENG Zong-wei.Implementation Method of High-Resolution DAC Using the MCU′s PWM Interfaces[J].Acta Electronica Sinica,2012,40(8):1631-1634. | |
| Authors: | WU Gui-qing LI Hong-lin DAI Yu-xing ZHENG Zong-wei |
| Affiliation: | 1.College of Electrical and Information Engineering,Hunan University,Changsha,Hunan 410082,China;2.College of Physics and Electronic Information Engineering,Wenzhou University,Wenzhou,Zhejiang 325035,China) |
| Abstract: | A method that improving the resolution of PWM(Pulse-Width Modulation) mode DAC(Digital-To-Analog Converter) by interpolator was proposed for the problem that PWM mode DAC in embedded applications and how to choose DAC chip.The PWM signal spectrum was analyzed.The design principle and method of analog filter was proposed.The design of High-Resolution DAC using MCU’s(Micro Control Unit) PWM proved that this method is stable and reliable by analysis of experiments. |
| Keywords: | digital-to-analog converter oversampling technique pulse-width-modulation resolution microcontroller |
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