Přístupnostní navigace
E-application
Search Search Close
Publication detail
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
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
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" }