Publication detail

Reconnection-less Reconfigurable Low-Pass Filtering Topology Suitable for Higher-Order Fractional-Order Design

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"
}