Publication detail

Accurate constant phase elements dedicated for audio signal processing

PETRŽELA, J.

Original Title

Accurate constant phase elements dedicated for audio signal processing

Type

journal article in Web of Science

Language

English

Original Abstract

This review paper introduces real-valued two-terminal fully passive RC ladder structures of the so-called constant phase elements (CPE). These lumped electronic circuits can be understood as two-terminal elements described by fractional-order (FO) dynamic, i.e. current-voltage relation described by non-integer-order integration or derivation. Since CPE that behaves close to ideal is still not off-the-shelf component, correct behavior must be approximated in the frequency domain and is valid only in the predefined operational frequency interval. In this study, audio frequency range starting with 20 Hz and ending with 20 kHz has been chosen. CPEs are designed and values tabularized for predefined phase shifts that are commonly used in practice. If constructed carefully, maximum phase error less than 0.5° can be achieved. Several examples of direct utilization of designed CPEs in signal processing applications are provided.

Keywords

admittance function synthesis; audio effect; circuit synthesis; constant phase element; 21 fractional-order; frequency response; ladder network; passive filter; zeroes and poles

Authors

PETRŽELA, J.

Released

15. 11. 2019

Publisher

MDPI

Location

Basel (Switzerland)

ISBN

2076-3417

Periodical

Applied Sciences - Basel

Year of study

9

Number

22

State

Swiss Confederation

Pages from

1

Pages to

35

Pages count

35

URL

https://www.mdpi.com/2076-3417/9/22/4888

Full text in the Digital Library

http://hdl.handle.net/11012/184116

BibTex

@article{BUT159900,
  author="Jiří {Petržela}",
  title="Accurate constant phase elements dedicated for audio signal processing",
  journal="Applied Sciences - Basel",
  year="2019",
  volume="9",
  number="22",
  pages="1--35",
  doi="10.3390/app9224888",
  issn="2076-3417",
  url="https://www.mdpi.com/2076-3417/9/22/4888"
}