Design of Fractional-Order Low-Pass and High-Pass Filter

2020 ◽  
pp. 535-542
Author(s):  
Vikash Kumar ◽  
Aminul Islam
Keyword(s):  
Fractional Order ◽  
Pass Filter ◽  
High Pass Filter ◽  
Low Pass ◽  
High Pass

scholarly journals (N + α)-Order low-pass and high-pass filter transfer functions for non-cascade implementations approximating butterworth response

2021 ◽  
Vol 24 (3) ◽  
pp. 689-714
Author(s):  
David Kubanek ◽  
Jaroslav Koton ◽  
Jan Jerabek ◽  
Darius Andriukaitis
Keyword(s):  
Transfer Function ◽  
Fractional Order ◽  
Transfer Functions ◽  
Function Optimization ◽  
Pass Filter ◽  
Operational Transconductance Amplifiers ◽  
High Pass Filter ◽  
Approximation Errors ◽  
Low Pass ◽  
High Pass

Abstract The formula of the all-pole low-pass frequency filter transfer function of the fractional order (N + α) designated for implementation by non-cascade multiple-feedback analogue structures is presented. The aim is to determine the coefficients of this transfer function and its possible variants depending on the filter order and the distribution of the fractional-order terms in the transfer function. Optimization algorithm is used to approximate the target Butterworth low-pass magnitude response, whereas the approximation errors are evaluated. The interpolated equations for computing the transfer function coefficients are provided. An example of the transformation of the fractional-order low-pass to the high-pass filter is also presented. The results are verified by simulation of multiple-feedback filter with operational transconductance amplifiers and fractional-order element.

scholarly journals Portable Electrocardiograph Dengan Sadapan Pada Telapak Tangan Dan Kaki

2020 ◽  
Vol 13 (2) ◽  
pp. 107-114
Author(s):  
Muhammad Syifaul Linnas ◽  
Sumber Sumber ◽  
Prastawa Assalim Tetraputra
Keyword(s):  
Personal Computer ◽  
Notch Filter ◽  
Pass Filter ◽  
Low Pass Filter ◽  
High Pass Filter ◽  
Low Pass ◽  
High Pass

    Electrocardiograph (ECG) secara rutin dilakukan oleh operator terampil yang terbiasa dengan penempatan masing-masing elektroda pada pasien. Posisi elektroda yang salah dapat menyebabkan kesalahan kritis dalam diagnosis dan perawatan penyakit jantung. Tujuan dari penelitian ini adalah mendesain sebuah Portable Electrocardiograph dengan Sadapan Pada Telapak Tangan dan Kaki. Kontribusi dari penelitian ini adalah  memudahkan orang awam dalam bidang kesehatan dalam hal penggunaan Electrocardiograph. Penelitian ini juga bertujuan  mendesain Electrocardiograph yang cukup terjangkau bagi puskesmas/pusat-pusat pelayanan medis di daerah. Agar desain ini dapat memudahkan dalam metode penggunaan alat, maka dibuatlah alat Electrocardiograph (ECG) dengan elektroda pad yang akan diletakkan pada telapak tangan dan telapak kaki yang telah di berikan tanda pada elektroda tersebut. Electrocardiograph (ECG) menggunakan desain High Pass Filter (Pasif 20dB ditambah Non Inverting Amplifier, Low Pass Filter (LPF) 40dB, dan notch filter yang akan ditampilkan pada layar monitor Personal Computer (PC). Dari hasil sadapan beberapa responden, terlihat hasil tampilan yang menyerupai/mendekati sinyal Electrocardiograph (ECG) sebenarnya. Kekurangan dari modul ini jika tidak adanya grounding yang baik dari power suply maka akan terjadi noise pada hasil sinyal yang akan ditampilkan. Hasil penelitian ini dapat di implementasikan pada Electrocardiograph (ECG) konvensional untuk meningkatkan kemudahan dalam hal penggunaan alat.    

Construction of a High-Pass Digital Filter from a Low-Pass Digital Filter

1994 ◽  
Vol 10 (4) ◽  
pp. 374-381 ◽  
Author(s):  
Stephen D. Murphy ◽  
D. Gordon E. Robertson
Keyword(s):  
Digital Filter ◽  
Low Frequency ◽  
Frequency Noise ◽  
Band Pass Filter ◽  
Low Frequency Noise ◽  
Pass Filter ◽  
Low Pass Filter ◽  
High Pass Filter ◽  
Low Pass ◽  
High Pass

To remove low-frequency noise from data such as DC-bias from electromyo-grams (EMGs) or drift from force transducers, a high-pass filter was constructed from a low-pass filter of known characteristics. A summary of the necessary steps required to transform the low-pass digital were developed. Contaminated EMG and force platform data were used to test the filter. The high-pass filter successfully removed the low-frequency noise from the EMG signals. The high-pass filter was then cascaded with the low-pass filter to produce a band-pass filter to enable simultaneous high- and low-frequency noise reduction.

scholarly journals Fractional-order high-pass filter with electronically adjustable parameters

2016 ◽  
Author(s):  
Jan Jerabek ◽  
Roman Sotner ◽  
Jan Dvorak ◽  
Lukas Langhammer ◽  
Jaroslav Koton
Keyword(s):  
Fractional Order ◽  
Pass Filter ◽  
High Pass Filter ◽  
High Pass

Design of Portable ECG Tester

2011 ◽  
Vol 328-330 ◽  
pp. 228-231
Author(s):  
Xiu Hui Fu ◽  
Hong Ru Lin ◽  
Shu Li Ouyang ◽  
Wei Bo Song
Keyword(s):  
Ecg Signal ◽  
Electrode Polarization ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Baseline Drift ◽  
Basic Frequency ◽  
The Core ◽  
High Pass Filter ◽  
Low Pass ◽  
High Pass

In order to solve the problem of ECG acquisition and processing better, this paper designs a portable ECG tester, which uses the SCM as the core controller. Power basic frequency interference was removed by 50 Hz trap filter. Power harmonic interference, electrode polarization interference and my electricity interference were removed by low- pass filter. Baseline drift was removed by high- pass filter. At the same time; we test the performance of acquisition circuit, filter circuit and amplification circuit. As a result, it is shown that the system can well collect and process ECG signal.

scholarly journals Полосковый сверхширокополосный полосно-пропускающий фильтр с уровнем подавления помех более 100 dB

2020 ◽  
Vol 46 (16) ◽  
pp. 7
Author(s):  
Б.А. Беляев ◽  
А.М. Сержантов ◽  
Ан.А. Лексиков ◽  
Я.Ф. Бальва ◽  
Е.О. Грушевский
Keyword(s):  
Bandpass Filter ◽  
Ultra Wideband ◽  
Pass Filter ◽  
Low Pass Filter ◽  
High Pass Filter ◽  
Electrodynamic Analysis ◽  
Cascade Connection ◽  
Low Pass ◽  
5 Ghz ◽  
High Pass

An ultra-wideband bandpass filter formed by a cascade connection of a new high-pass filter (HPF) and a low-pass filter (LPF), which are made on suspended substrates with a double-sided pattern of strip conductors, is under investigation. The high selectivity of the HPF is observed due to the presence of zero poles at the frequency response near the passband, which number is equal to the order of the filter. A second-order HPF, designed on a 0.5 mm thick substrate with a relative permittivity ε = 9.8, was synthesized using numerical electrodynamic analysis of its 3D model. The experimental HPF has the 3 dB cut-off frequency at fb = 0.25 GHz and it's passband extends up to 5 GHz. An ultra-wideband bandpass filter made by cascade connection of the low-pass filter and developed high-pass filter has a relative bandwidth Delta f / f0 = 150% with a central frequency f0 = 1 GHz. It has a wide and deep high-frequency stopband, which extends up to a frequency of 7.8f0 for the suppression level -100 dB.

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