Publication detail

Electronically tunable pseudocapacitance for fractional-order (α=0.25) passive element

ŠOTNER, R. COLBURN, S. JEŘÁBEK, J. POLÁK, L. FREEBORN, T.

Original Title

Electronically tunable pseudocapacitance for fractional-order (α=0.25) passive element

Type

journal article in Web of Science

Language

English

Original Abstract

A novel device based on component substitution is presented to realize a fractional-order (alpha = 0.25) passive element with electronically tunable pseudocapacitance. Tuning is achieved using a single bias voltage applied to optocouplers operating as variable resistance elements. Experimental measurements of a fabricated device demonstrate pseudocapacitance from 46 mu F/sec3/4 to 464 mu F/sec3/4 using a bias voltage from 3 V to 20 V. The constant phase behavior with +/- 2.5 degrees variation over three decades of frequency (up to 1 MHz) is demonstrated. The practical application example implements variable pseudocapacitance in electronically adjustable integrator.

Keywords

Constant phase element; Fractional capacitor; Fractional-order; Electronic tuning; Pseudocapacitance

Authors

ŠOTNER, R.; COLBURN, S.; JEŘÁBEK, J.; POLÁK, L.; FREEBORN, T.

Released

30. 4. 2025

Publisher

ELSEVIER SCI LTD

Location

London

ISBN

1873-412X

Periodical

MEASUREMENT

Year of study

253

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

11

Pages count

11

URL

https://www.sciencedirect.com/science/article/pii/S0263224125010401

BibTex

@article{BUT198018,
  author="Roman {Šotner} and Simon {Colburn} and Jan {Jeřábek} and Ladislav {Polák} and Todd {Freeborn}",
  title="Electronically tunable pseudocapacitance for fractional-order (α=0.25) passive element",
  journal="MEASUREMENT",
  year="2025",
  volume="253",
  number="1",
  pages="11",
  doi="10.1016/j.measurement.2025.117681",
  issn="1873-412X",
  url="https://www.sciencedirect.com/science/article/pii/S0263224125010401"
}