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LANGHAMMER, L. DVOŘÁK, J. ŠOTNER, R. JEŘÁBEK, J. BERTSIAS, P.
Original Title
Reconnection-less Reconfigurable Low-Pass Filtering Topology Suitable for Higher-Order Fractional-Order Design
Type
journal article in Web of Science
Language
English
Original Abstract
The paper discusses a new design of a current–mode reconnection–less reconfigurable fractional–order (FO) low–pass filter of various orders. The filtering structure is based on a 4th–order leap–frog topology using operational transconductance amplifiers as basic building blocks. The resulting order of the filter is given by the setting of current gains (allowing the reconnection–less reconfiguration) alongside with the values of the fractional–order capacitors realized by the RC ladder networks. For this purpose, RC ladder networks of orders 0.3, 0.4, 0.5, 0.6 and 0.7 have been designed. The fractional–order form of the filter contains from one up to four FO capacitors (remaining capacitors (if there are any) are of integer–order) allowing to obtain low–pass functions of order of 3+α, 2+α, 1+α, 2+α+β, 1+α+β, α+β, 1+α+β+γ, α+β+γ and α+β+γ+δ. The proposed filter offers a wide variety of possible order combinations with an increasing degree of freedom as the number of fractional–order capacitors within the structure increases. The proposal is supported by the PSpice simulations of magnitude and phase characteristics, pole frequency adjustment and stability analysis. Moreover, the experimental measurements of the implemented filter were carried out and compared with the simulation results. The possibility of the electronic control of the fractional order is also discussed and presented.
Keywords
current–mode; electronic control; fractional–order; frequency filter; higher–order filter; reconnection–less reconfiguration
Authors
LANGHAMMER, L.; DVOŘÁK, J.; ŠOTNER, R.; JEŘÁBEK, J.; BERTSIAS, P.
Released
1. 9. 2020
Publisher
Elsevier
ISBN
2090-1232
Periodical
Journal of Advanced Research
Year of study
25
Number
9/2020
State
Arab Republic of Egypt
Pages from
257
Pages to
274
Pages count
18
URL
https://www.sciencedirect.com/science/article/pii/S2090123220301314
Full text in the Digital Library
http://hdl.handle.net/11012/195250
BibTex
@article{BUT164324, author="Lukáš {Langhammer} and Jan {Dvořák} and Roman {Šotner} and Jan {Jeřábek} and Panagiotis {Bertsias}", title="Reconnection-less Reconfigurable Low-Pass Filtering Topology Suitable for Higher-Order Fractional-Order Design", journal="Journal of Advanced Research", year="2020", volume="25", number="9/2020", pages="257--274", doi="10.1016/j.jare.2020.06.022", issn="2090-1232", url="https://www.sciencedirect.com/science/article/pii/S2090123220301314" }