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Applications of Fractional-Order Circuits

  • Georgia Tsirimokou
  • Costas Psychalinos
  • Ahmed Elwakil
Chapter
Part of the SpringerBriefs in Electrical and Computer Engineering book series (BRIEFSELECTRIC)

Abstract

This chapter focuses on the design of novel topologies that are suitable for implementing fractional-order circuits, which offer attractive features, especially when they are applied in biomedical applications. The design examples that will be presented are (i) the efficiency of fractional-order differentiators for handling signals in a noisy environment using the Pan-Tompkins algorithm, (ii) a fully tunable implementation of a biological tissue using fractional-order capacitors, (iii) a simple non-impedancebased measuring technique for supercapacitors, and (iv) the design and evaluation of a fractional-order oscillator. Then main feature that has been proved is the fact that fractional-order circuits offer better performance when compared to their integer-order counterparts. In case of designing the fractional-order differentiator for being used in the Pan-Tompkins algorithm, the Sinh-Domain technique (companding filtering) has been employed, while the nonlinear transconductances that have been used as active elements were build using MOS transistors biased in subthreshold region, offering also the benefit of low- voltage operation. In addition, fractional-order capacitors are designed using OTAs as active elements, offering also the benefit of low- voltage operation. The behaviour of the proposed structures is evaluated through simulation results.

Keywords

Fractional-order integrators and differentiators Fractional-order capacitors Fractional-order oscillator Biomedical circuits Supercapacitors 

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Copyright information

© The Author(s) 2017

Authors and Affiliations

  • Georgia Tsirimokou
    • 1
  • Costas Psychalinos
    • 1
  • Ahmed Elwakil
    • 2
    • 3
  1. 1.Physics Department Electronics LaboratoryUniversity of PatrasRio PatrasGreece
  2. 2.Department of Electrical and Computer EngineeringUniversity of SharjahSharjahUnited Arab Emirates
  3. 3.Nanoelectronics Integrated Systems Center (NISC)Nile UniversityCairoEgypt

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