Open AccessTunable band-pass filter for continuous spectral analysis of cardiointervalogram
Author(s) -
А. В. Белов,
А. Н. Анисимов,
Timofey Sergeev,
Nikolay Suvorov
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1515/5/052064
Subject(s) - voltage controlled filter , schematic , butterworth filter , active filter , band pass filter , high pass filter , center frequency , electronic engineering , computer science , electronic filter topology , low pass filter , m derived filter , filter (signal processing) , prototype filter , band stop filter , bandwidth (computing) , electronic filter , engineering , telecommunications , electrical engineering , voltage , computer vision
The developed device refers to analog low-pass filtering circuits and works as Butterworth-type broadband active RC filter. This filter can be used in devices for the human cardiovascular system diagnostic purposes, providing an opportunity to assess the state of the cardiovascular system. Such approach is based on the analysis of cardiointervalogram spectral power and can be implemented in biofeedback systems that use the current values of this power to generate feedback signals. The filter consists of second-order active bandpass filter blocks, connected together in series. Implemented schematic provides simultaneous tuning of the resonant frequency and the quality factor of the band-pass filter. This feature allowing to adjust the bandwidth while maintaining the center frequency and tuning the center frequency while maintaining the constancy of the band. The selection of bandpass filter tuning mode is made by selecting the appropriate adjustable components.