Detail publikačního výsledku

Fractional-Order Phase Shifters with Constant Magnitude Frequency Responses

ŠOTNER, R.; LANGHAMMER, L.; JEŘÁBEK, J.; USHAKOV, P.; DOSTÁL, T.

Original Title

Fractional-Order Phase Shifters with Constant Magnitude Frequency Responses

English Title

Fractional-Order Phase Shifters with Constant Magnitude Frequency Responses

Type

WoS Article

Original Abstract

This contribution presents and experimentally analyzes the idea how to reach the constant magnitude as well as the phase response in the fractional-order (FO) phase when shifting two-ports. The straightforward method employing the automatic gain control circuit (AGC) in a cascade after so-called constant phase block approximating FO integrator or differentiator is studied. The variable gain amplifier utilized in AGC and simple RC-based FO constant phase elements (approximating capacitors with order alpha = 1/4 and alpha = 1/2 as an example) connected in the feedback of operational amplifier-based integrator are established in the experimental setup. The operation indicated in three decades (between 100 Hz and 100 kHz) is evaluated. The known solutions of the standard FO phase shifting circuits are discussed and generally compared with the features obtained in this paper, together with the supposed effects of AGC on their performances.

English abstract

This contribution presents and experimentally analyzes the idea how to reach the constant magnitude as well as the phase response in the fractional-order (FO) phase when shifting two-ports. The straightforward method employing the automatic gain control circuit (AGC) in a cascade after so-called constant phase block approximating FO integrator or differentiator is studied. The variable gain amplifier utilized in AGC and simple RC-based FO constant phase elements (approximating capacitors with order alpha = 1/4 and alpha = 1/2 as an example) connected in the feedback of operational amplifier-based integrator are established in the experimental setup. The operation indicated in three decades (between 100 Hz and 100 kHz) is evaluated. The known solutions of the standard FO phase shifting circuits are discussed and generally compared with the features obtained in this paper, together with the supposed effects of AGC on their performances.

Keywords

Automatic gain control circuit; Constant magnitude response; Constant phase block; Constant phase element; Differentiator; Fractional-order; Integrator; Phase Shifter; Variable gain amplifier

Key words in English

Automatic gain control circuit; Constant magnitude response; Constant phase block; Constant phase element; Differentiator; Fractional-order; Integrator; Phase Shifter; Variable gain amplifier

Authors

ŠOTNER, R.; LANGHAMMER, L.; JEŘÁBEK, J.; USHAKOV, P.; DOSTÁL, T.

RIV year

2020

Released

10.10.2019

Publisher

Kaunas University of Technology

Location

Kaunas, Lithuania

ISBN

1392-1215

Periodical

Elektronika Ir Elektrotechnika

Volume

25

Number

5

State

Republic of Lithuania

Pages from

25

Pages to

30

Pages count

6

URL

http://eejournal.ktu.lt/index.php/elt/article/view/24352

Full text in the Digital Library

http://hdl.handle.net/11012/184637

BibTex

@article{BUT159077,
  author="Roman {Šotner} and Lukáš {Langhammer} and Jan {Jeřábek} and Peter A. {Ushakov} and Tomáš {Dostál}",
  title="Fractional-Order Phase Shifters with Constant Magnitude Frequency Responses",
  journal="Elektronika Ir Elektrotechnika",
  year="2019",
  volume="25",
  number="5",
  pages="25--30",
  doi="10.5755/j01.eie.25.5.24352",
  issn="1392-1215",
  url="http://eejournal.ktu.lt/index.php/elt/article/view/24352"
}

Documents

04__ISSN_1392-1215__Fractional-Order Phase Shifters with Constant Magnitude Frequency Responses_corrected
24352-Article Text-77640-1-10-20191008