Publication detail

Pseudo-Differential (2+alpha)-Order Butterworth Frequency Filter

SLÁDOK, O. KOTON, J. KUBÁNEK, D. DVOŘÁK, J. PSYCHALINOS, C.

Original Title

Pseudo-Differential (2+alpha)-Order Butterworth Frequency Filter

Type

journal article in Web of Science

Language

English

Original Abstract

This paper describes the design of analog pseudo-differential fractional frequency filter with the order of (2 + alpha), where 0 < alpha < 1. The filter operates in a mixed-transadmittance mode (voltage input, current output) and provides a low-pass frequency response according to Butterworth approximation. General formulas to determine the required transfer function coefficients for desired value of fractional order alpha are also introduced. The designed filter provides the beneficial features of fully-differential solutions but with a less complex circuit topology. It is canonical, i.e. it employs a minimum number of passive elements, whereas all are grounded, and current conveyors as active elements. The proposed structure offers high input impedance, high output impedance, and high common-mode rejection ratio. By simple modification, voltage response can also be obtained. The performance of the proposed frequency filter is verified both by simulations and experimental measurements proving the validity of theory and the advantageous features of the filter.

Keywords

Current conveyor; fractional Butterworth transfer function; fractional-order filter; pseudo-differential fiter.

Authors

SLÁDOK, O.; KOTON, J.; KUBÁNEK, D.; DVOŘÁK, J.; PSYCHALINOS, C.

Released

22. 6. 2021

Publisher

IEEE

ISBN

2169-3536

Periodical

IEEE Access

Year of study

9

Number

1

State

United States of America

Pages from

92178

Pages to

92188

Pages count

11

URL

https://ieeexplore.ieee.org/document/9462108

Full text in the Digital Library

http://hdl.handle.net/11012/201003

BibTex

@article{BUT171951,
  author="Ondřej {Sládok} and Jaroslav {Koton} and David {Kubánek} and Jan {Dvořák} and Costas {Psychalinos}",
  title="Pseudo-Differential (2+alpha)-Order Butterworth Frequency Filter",
  journal="IEEE Access",
  year="2021",
  volume="9",
  number="1",
  pages="92178--92188",
  doi="10.1109/ACCESS.2021.3091544",
  issn="2169-3536",
  url="https://ieeexplore.ieee.org/document/9462108"
}