| Περίληψη: | The subject of this M.Sc. Thesis is the hardware implementation of fractional-order model of the biceps tissue during fatiguing exercise. Fractional-order systems are an area of research that have plenty of applications in modeling electrical properties of biological tissues or cells. For the emulation of the impedance of biceps tissue, the known Cole-Cole model, a fractional-order capacitor (CPE) has been used and two floating resistors. However, fractional-order capacitor is not commercially available device yet and is realized through integer-order approximations. More precisely, the 2th−order Continued Fraction Expansion approximation is used, in order to present the fractional-order differentiator, that is included in CPE, and the calculation of the transfer functions of it. Differentiator and floating resistors of the system, constructed from appropriately configured Operational Transconductance Amplifiers (OTAs). Moreover, the implementation of the fractional-order differentiator with the minimum number of OTAs has been searched out between the direct method and the Partial Fraction Expansion.
The performance of the proposed scheme is verified through post-layout simulations using Cadence and the Design Kit provided by the Austria Mikro Systeme (AMS) 0.35μm CMOS technology process.
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