一款平顶特性窄带滤波器的设计
esign of Flat-Roofed Narrow Band Filter
有源滤波器具有与RLC串联谐振电路相同的特性曲线，利用数值计算的方法，得出两级级联的滤波器在临界偏调时各级中心频率f0与Q值的关系，分析了电路不同Q值与平顶宽度的关系；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、灵敏度进行了讨论。建议利用该电路设计成50Hz工频陷波器。
he active filter has the same characteristic curve with RLC Series Resonant Circuit. By numerical calculation, the relation can be obtained between all-levels central frequency and Q value when the filter of two stage cascade is critical for offset. And the relation can also be analysed between the width of flat-top and Q value. A flattened narrow-belt bandpass filter is designed according to the.analysis. The test result indicates that its properties are consistent with theoretical calculating curve. Besides, the selectivity and sensitivity of the circuit is disscussed. It\\\\\\\
乔小瑞、沈博、耿丽霞、鲁永康
电子电路
有源滤波器，平顶特性窄带滤波器，选择性，50Hz工频陷波器
active filter，flattened narrow-belt filter，selectivity，50Hz power frequency notch filter ……
乔小瑞,沈博,耿丽霞,鲁永康.一款平顶特性窄带滤波器的设计[EB/OL].(2008-05-23)[2025-08-11].http://www.paper.edu.cn/releasepaper/content/200805-681.点此复制
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