Publication detail

Fractional-Order Low-Pass Filter with Electronic Tunability of Its Order and Pole Frequency

LANGHAMMER, L. DVOŘÁK, J. JEŘÁBEK, J. KOTON, J. ŠOTNER, R.

Original Title

Fractional-Order Low-Pass Filter with Electronic Tunability of Its Order and Pole Frequency

English Title

Fractional-Order Low-Pass Filter with Electronic Tunability of Its Order and Pole Frequency

Type

journal article in Web of Science

Language

en

Original Abstract

This paper presents novel solution of a fractional-order low-pass filter (FLPF). The proposed filter operates in the current mode and it is designed using third-order inverse follow-the-leader feedback topology and operational transconductance amplifiers (OTAs), adjustable current amplifiers (ACAs), auxiliary multiple-output current follower (MO-CF) as simple active elements. The filter offers the beneficial ability of the electronic control of its order and also the pole frequency thanks to electronically controlled internal parameters of OTAs and ACAs. As an example, five particular values of fractional order of the FLPF were chosen and parameters of the filter were calculated. Similarly, also electronic control of the pole frequency of the filter was studied. The design correctness and proper function of the filter are supported by simulations with CMOS models and also by experimental laboratory measurements. Comparison of the simulation results of the proposed filter for two different approximations of the parameter sa is also included.

English abstract

This paper presents novel solution of a fractional-order low-pass filter (FLPF). The proposed filter operates in the current mode and it is designed using third-order inverse follow-the-leader feedback topology and operational transconductance amplifiers (OTAs), adjustable current amplifiers (ACAs), auxiliary multiple-output current follower (MO-CF) as simple active elements. The filter offers the beneficial ability of the electronic control of its order and also the pole frequency thanks to electronically controlled internal parameters of OTAs and ACAs. As an example, five particular values of fractional order of the FLPF were chosen and parameters of the filter were calculated. Similarly, also electronic control of the pole frequency of the filter was studied. The design correctness and proper function of the filter are supported by simulations with CMOS models and also by experimental laboratory measurements. Comparison of the simulation results of the proposed filter for two different approximations of the parameter sa is also included.

Keywords

adjustable current amplifier; current mode; electronically tunable; fractional-order; FLPF; low-pass filter; operational transconductance amplifier

Released

27.02.2018

Publisher

FEI STU Bratislava

Location

Bratislava

Pages from

3

Pages to

13

Pages count

11

URL

Full text in the Digital Library

BibTex


@article{BUT141997,
  author="Lukáš {Langhammer} and Jan {Dvořák} and Jan {Jeřábek} and Jaroslav {Koton} and Roman {Šotner}",
  title="Fractional-Order Low-Pass Filter with Electronic Tunability of Its Order and Pole Frequency",
  annote="This paper presents novel solution of a fractional-order low-pass filter (FLPF). The proposed filter operates in the current mode and it is designed using third-order inverse follow-the-leader feedback topology and operational transconductance amplifiers (OTAs), adjustable current amplifiers (ACAs), auxiliary multiple-output current follower (MO-CF) as simple active elements. The filter offers the beneficial ability of the electronic control of its order and also the pole frequency thanks to electronically controlled internal parameters of OTAs and ACAs. As an example, five particular values of fractional order of the FLPF were chosen and parameters of the filter were calculated. Similarly, also electronic control of the pole frequency of the filter was studied. The design correctness and proper function of the filter are supported by simulations with CMOS models and also by experimental laboratory measurements. Comparison of the simulation results of the proposed filter for two different approximations of the parameter sa is also included.",
  address="FEI STU Bratislava",
  chapter="141997",
  doi="10.1515/jee-2018-0001",
  howpublished="online",
  institution="FEI STU Bratislava",
  number="1",
  volume="69",
  year="2018",
  month="february",
  pages="3--13",
  publisher="FEI STU Bratislava",
  type="journal article in Web of Science"
}