| 一款平顶特性窄带滤波器的设计 |
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| 引用本文： | 乔小瑞,沈博,郑彦鹏,李志华,鲁永康.一款平顶特性窄带滤波器的设计[J].电测与仪表,2009,46(2). |
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| 作者姓名： | 乔小瑞 沈博 郑彦鹏 李志华 鲁永康 |
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| 作者单位： | 1. 中国地质大学机械与电子信息学院,武汉,430074
2. 国家海洋局第一海洋研究所,山东,青岛,266061 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 为满足地球物理勘探中频域测试的需求,利用数值计算的方法,计算并得出了两级级联的有源带通滤波器在临界偏调时各级中心频率f0与Q值的关系;据此设计并制作了具有平顶特性的窄带通滤波器.实测结果表明其特性与理论计算曲线一致.此外,还对电路的选择性、灵敏度、平顶宽度以及等效噪声带宽等参数作了进一步讨论.建议利用该电路设计成50Hz工频陷波器.
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| 关 键 词： | 平顶特性窄带滤波器 选择性 低噪声设计 50Hz工频陷波器 |
Design of Flat-roofed Narrow Band Pass Filter |
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| QIAO Xiao-rui,SHEN Bo,ZHENG Yan-peng,LI Zhi-hua,LU Yong-kang.Design of Flat-roofed Narrow Band Pass Filter[J].Electrical Measurement & Instrumentation,2009,46(2). |
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| Authors: | QIAO Xiao-rui SHEN Bo ZHENG Yan-peng LI Zhi-hua LU Yong-kang |
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| Affiliation: | QIAO Xiao-rui1,SHEN Bo1,ZHENG Yan-peng2,LI Zhi-hua1,LU Yong-kang1(1.School of Electronic Information & Mechanics,China University of Geosciences,Wuhan 430074,China.2.First Institute of Oceanograply,Qingdao 266061,Sh,ong,China) |
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| Abstract: | In order to fulfill the need of frequency domain test in geophysical exploration,with numerical method,the relationship can be obtained between all-levels central frequency and Q value when the two stage cascade filter is critical for offset,according to which,a flattened narrow-belt band pass filter is designed.And the test result indicates that its characteristics are consistent with theoretical calculating curve.Besides,the selectivity,sensitivity,the width of flat-top and Low-Noise bandwidth of the circ... |
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| Keywords: | flattened narrow-belt filter selectivity Low-Noise Designing 50Hz power frequency notch filter |
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