| 一种基于DDS的寄生电感测量仪设计 |
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| 引用本文： | 徐华中,周玉栋. 一种基于DDS的寄生电感测量仪设计[J]. 电子测量技术, 2011, 34(4): 14-17 |
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| 作者姓名： | 徐华中 周玉栋 |
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| 作者单位： | 武汉理工大学自动化学院; |
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| 摘 要： | 精确的测量寄生电感,对于电容的合理应用具有十分重要的意义,介绍了一种利用LC谐振原理测量电容自身寄生电感的方法.利用直接数字合成器产生可编程的扫频信号激励含有寄生电感的电容,同时采用对数检波器对经过待测网络后的信号进行检波,在利用AD转换器采集检波器输出的直流信号.利用特定的程序算法比较连续的频率点的输出电平,最终找出...
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| 关 键 词： | 谐振 寄生电感 扫频 对数检波器 |
Design of a parasitic inductance measuring instrument based on DDS |
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| Xu Huazhong,Zhou Yudong. Design of a parasitic inductance measuring instrument based on DDS[J]. Electronic Measurement Technology, 2011, 34(4): 14-17 |
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| Authors: | Xu Huazhong Zhou Yudong |
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| Affiliation: | Xu Huazhong Zhou Yudong(College of Automation Wuhan University of Technology,Wuhan 430070) |
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| Abstract: | Accurate measurement of parasitic inductance is very important,this paper presents a method of measuring the inductance of a capacitor based on the LC resonant principle.A programmable sweep signal generated by DDS excitation capacitor thai with parasitic inductance,while a log detector detects the level of the signal which has just passed from the network under testing,A AD converter capture the DC signal output from the detector.A specific program algorithm has been used to find the resonance frequency,ca... |
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| Keywords: | resonant parasitic inductance sweep frequency log detector |
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