Optimal design on twin-T notch filter in electromagnetic exploration equipments

Author

Jing, Pei ; Dan, Huang ; Qiyun, Jiang

Author_Institution

Sch. of Info-Phys. & Geomatic Eng., Central South Univ., Changsha, China

fYear

2011

fDate

15-17 April 2011

Firstpage

1510

Lastpage

1515

Abstract

This paper analyzes the twin-T notch filter circuit, and gives the expressions of the transfer function, f₀, BW and Q. Based on calculation, analysis and simulation, the optimal resistances and capacitances are selected according to the characteristics of wide field electromagnetic signal and the suppression requirement of power frequency interference. Experiments show that the optimal design of twin-T notch filter not only keeps the required signal, but also filters out power frequency and its harmonic interference noise to the utmost.

Keywords

electromagnetic devices; interference suppression; notch filters; electromagnetic exploration equipments; electromagnetic signal; harmonic interference noise; power frequency interference suppression; twin-T notch filter optimal design; Band pass filters; Capacitors; Electromagnetics; Interference; Mathematical model; Power harmonic filters; Resistors; electromagnetic exploration equipments; power frequency interference; twin-T notch filter; wide field electromagnetic receivers;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Information and Control Engineering (ICEICE), 2011 International Conference on

Conference_Location

Wuhan

Print_ISBN

978-1-4244-8036-4

Type

conf

DOI

10.1109/ICEICE.2011.5777425

Filename

5777425