物探与化探2011，Vol.35Issue(5)：626-629,4.
广域电磁仪中的双T陷波器的优化设计
OPTIMIZED DESIGN OF TWIN-T NOTCH FILTER IN WIDE FIELD ELECTROMAGNETOMETER
黄丹 1裴婧 1蒋奇云1
作者信息
- 1. 中南大学信息物理工程学院,湖南长沙410083
- 折叠
摘要
Abstract
This paper analyzed the twin-T notch filler circuit, deduced the expressions of transfer function, center frequency, bandwidth and Q value. Through calculation, analysis and simulation, the optimal resistance and capacitance were selected for the characteristics of wide field electromagnetic signal and the suppression requirements of frequency interference. Experiments show that the optimal design of twin-T notch filters minimum depth of suppression is -31.9 Db when the bandwidth is only 3. 62, so the application of the optimal design of twin-T notch filler can not only keep the desired signal, but also maximally filter out frequency and its harmonic interference noise in the wide field electromagnetometer.关键词
广域电磁仪/工频干扰/双T陷波器Key words
wide field electromagnetometer/frequency interference/twin-T notch filter分类
天文与地球科学引用本文复制引用
黄丹,裴婧,蒋奇云..广域电磁仪中的双T陷波器的优化设计[J].物探与化探,2011,35(5):626-629,4.
