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13 results on '"Zourmba, K."'

4. Fractional integrator circuit unit using Charef approximation method

Author

Zourmba, K., Fischer, C., Gambo, B., Effa, J. Y., and Mohamadou, A.

Abstract

This paper deals with the reduction of the approximated transfer function based on the Charef approximation method. The reduced transfer function is utilized for the realization of fractional integrator circuit unit. This model takes few components than the existent one and gives more accuracy according to the frequency of interest. In our investigation, we show the accuracy of the approximation in 2 dB and we specify our study in two domains in which chaotic systems use to operate. We identify the corresponding values of resistors and capacitors of αfor the frequency of interest. Moreover, we realized electronic circuit of two fractional order chaotic system with the proposed chain circuit unit. Comparing numerical simulations to electronic circuits realization, these results are compatibles.

Published
2024
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8. Wien-Bridge Chaotic Oscillator Circuit with Inductive Memristor Bipole.

Author

Zourmba, K., Fischer, C., Effa, J. Y., Gambo, B., and Mohamadou, A.

Subjects
*LYAPUNOV exponents, *ORBITS (Astronomy), *DIODES, *BIFURCATION diagrams, *BRIDGES, *LIMIT cycles, *EQUILIBRIUM
Abstract

By diode bridging an inductor to implement a memristor bipole, with active Wien-bridge oscillator, a simple and feasible third-order autonomous memristive chaotic oscillator is presented. The dynamical characteristics of the proposed circuit are investigated both theoretically and numerically, from which it can be found that the circuit has one unstable equilibrium point. Through the analysis of the bifurcation diagram, Lyapunov exponent spectrum and the 0–1 test chaos detection, it is shown that this system displays limit cycle orbit with different periodicity, quasi-periodic behavior, chaotic behavior and bursting behavior. The bursting behavior found in this circuit is periodic, quasi-periodic and chaotic bursting. We confirm the feasibility of the proposed theoretical model using Pspice simulations and a physical realization based on an electronic analog implementation of the model. [ABSTRACT FROM AUTHOR]

Published
2023
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