A low-pass notch filter for bioelectric signals

Author

Thomas, C.W. ; Huebner, William P. ; Leigh, R. John

Author_Institution

Dept. of Biomed. Eng., Case Western Reserve Univ., Cleveland, OH, USA

Volume

35

Issue

6

fYear

1988

fDate

6/1/1988 12:00:00 AM

Firstpage

496

Lastpage

498

Abstract

Many bioelectric signals have relatively low-frequency content, but measurement devices are susceptible to power-line interference. The Type II Chebyshev low-pass filter can simultaneously perform the required low-pass filtering and removal of the narrowband interference. This filter has transfer-function zeros which result in zero gain (- infinity dB) at specific ´null´ frequencies. A procedure for the low-pass filter design makes the first null frequency a design parameter so that the notch can occur at the interference frequency.

Keywords

bioelectric potentials; biomedical electronics; signal processing; Type II Chebyshev low-pass filter; bioelectric signals; low-pass notch filter; medical signal processing; narrowband interference; null frequency; power-line interference; transfer-function zeros; Attenuation; Band pass filters; Bioelectric phenomena; Chebyshev approximation; Digital filters; Filtering; Frequency; Gain; H infinity control; Interference; Low pass filters; Narrowband; Transfer functions; Electrophysiology; Equipment Design; Mathematics;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/10.2123

Filename

2123