Title :
Harmonic interference elimination by an active comb filter [ECG application]
Author :
Tsai, Chang-Tar ; Chan, Hsiao-Lung ; Tseng, Chien-Chen ; Wu, Chien-Ping
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
A new approach for an active comb filter design is proposed to remove the difficult harmonic interference contaminating the biomedical signals. The filter consists of four narrow-band bandpass filters. The center frequency of each bandpass filters is just the unwanted frequency characterized by the harmonic interference. The circuit demonstrates the capability to eliminate the interference of 60, 180, 300, and 420 Hz. The general 741 type operational amplifier has been used to realize the circuit presented. Triangular wave testing shows the effectiveness of harmonic interference cancellation
Keywords :
active filters; electrocardiography; harmonics; interference (signal); medical signal processing; 60 to 420 Hz; active comb filter; biomedical signal contamination; difficult harmonic interference; filter center frequency; general 741 type operational amplifier; narrow-band bandpass filters; standard ECG; triangular wave testing; unwanted frequency; Active filters; Band pass filters; Circuits; Electrocardiography; Frequency; Interference elimination; Narrowband; Operational amplifiers; Power harmonic filters; Signal design;
Conference_Titel :
Engineering in Medicine and Biology Society, 1994. Engineering Advances: New Opportunities for Biomedical Engineers. Proceedings of the 16th Annual International Conference of the IEEE
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-2050-6
DOI :
10.1109/IEMBS.1994.415235
