“ “ Multiscroll Chaotic Multiscroll Chaotic Oscillators Design in 1D, 2D Oscillators Design in 1D, 2D 3D: Analysis, Theory and 3D: Analysis, Theory and Applications Applications ” ” By: Dr. Carlos Sánchez- López Autonomous University of Tlaxcala, Mexico Department of Electronics 1
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“Multiscroll Chaotic Oscillators Design in 1D, 2D 3D: Analysis, Theory and Applications ”
“Multiscroll Chaotic Oscillators Design in 1D, 2D 3D: Analysis, Theory and Applications ”. By: Dr. Carlos Sánchez-López. Autonomous University of Tlaxcala, Mexico Department of Electronics . Outline . What is Chaos? Previous Work Design of Chaotic Oscillators in 1D - PowerPoint PPT Presentation
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““Multiscroll Chaotic Oscillators Design in Multiscroll Chaotic Oscillators Design in 1D, 2D 3D: Analysis, Theory and 1D, 2D 3D: Analysis, Theory and
ApplicationsApplications””By:
Dr. Carlos Sánchez-López
Autonomous University of Tlaxcala, Mexico
Department of Electronics
1
Outline
• What is Chaos?What is Chaos?
• Previous WorkPrevious Work
• Design of Chaotic Oscillators in 1D Design of Chaotic Oscillators in 1D
• Analysis, Simulation and Experimental results Analysis, Simulation and Experimental results
• Design of Chaotic Oscillators in 2DDesign of Chaotic Oscillators in 2D
• Analysis, Simulation and Experimental results Analysis, Simulation and Experimental results
• Design of Chaotic Oscillators in 3DDesign of Chaotic Oscillators in 3D
• Analysis and Numeric Simulations Analysis and Numeric Simulations
• ApplicationsApplications
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What is Chaos?
Chaotic oscillators can be used in various applications such as medicine, biology, communications system, etc.
Traditionally, the nonlinear resistor is made with OPAMP, CFOA, CCII, OTA as the principally block.
Block Transmitter M-DCSKBlock Transmitter M-DCSK3
Previous Work
Chua´s circuit descomposition: a systematic design approach for chaotic oscillators. A.S. Elwakil, M.P. Kennedy, Journal of the Franklin Institute, pp. 251-265, February 2000.
On Current Feedback Operational Amplifier-Based Realizations of Chua´s Circuit. Recai Kilic, Circuits Systems Signal Processing,Vol. 22 No. 5 2003, pag. 475-491.
An Improved Chua’s Circuit and Its Use in Hyperchaotic CircuitGaurav Gandhi, Analog Integrated Circuits and Signal Processing, Vol. 46, pag. 173-178, 2006.
Improved implementation of Chua´s Chaotic Oscillator using Current Feedback Opamp. A.S. Elwakil and M.P. Kennedy, IEEE Transactions on Circuits and Systems I, Vol. 47 No 1 January 2000.
Inductorless Realization of Chua OscillatorO. Morgul, ELECTRONICS LETTERS, 17th August 1995, Vol 31, No 17.
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Chua’s Circuit
Cruz, J.M. Chua, L.O. [1993] “A CMOS IC nonlinear resistor for Chua's circuit,” “A CMOS IC nonlinear resistor for Chua's circuit,” IEEE Trans. Circuits Syst.-I 39, 985-995.
α=10, β=14.87, m0=-0.68, m1=-1.27, the system produces a double-scroll chaotic attractors
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Kennedy M.P. [1992] “Robust Opamp Realization of Chus’a Circuit,” “Robust Opamp Realization of Chus’a Circuit,” Frequenz, vol. 46, no.3-4, pp. 66-80
Chua’s Circuit: Nonlinear resistor with Opamp
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Nonlinear resistor with CFOA
Elwakil [2000] “Chua’s circuit descomposition: a systematic design approach for chaotic oscillators,” “Chua’s circuit descomposition: a systematic design approach for chaotic oscillators,” Elsevier, pp. 251-265
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Nonlinear resistor with CCII
Gandhi G. [2006] “An improved Chua’s Circuit and Its use in Hyperchaotic Circuit” “An improved Chua’s Circuit and Its use in Hyperchaotic Circuit” Analog Integrated Circuits and Analog Integrated Circuits and Signal Processing, 46, 173-178Signal Processing, 46, 173-178
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Nonlinear Resistor with UGCs
Sanchez, et.al. [2007] “Low-Voltage Chaotic Oscillator Using Voltage and Current Followers,” “Low-Voltage Chaotic Oscillator Using Voltage and Current Followers,” IEEE CERMA pp. 159-163. 9
Grounded Inductor with UGCs
Sanchez, et.al. [2008] “Simulation of Chua’s Chaotic Oscillator Using Unity-Gain Cells” “Simulation of Chua’s Chaotic Oscillator Using Unity-Gain Cells” IEEE ICCDCS, Cancun Mexico.. 10
CFOA Connected as UGCs
Zin=∞ Zout=0
Zout=∞ Zin=0
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Nonlinear Resistor with UGC
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Nonlinear Resistor with UGCs
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Experimental and Simulation Results
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Experimental and Simulation Results
15Sanchez, et.al. [2008] “Experimental Verification of the Chua’s Circuit Designed with UGCs” “Experimental Verification of the Chua’s Circuit Designed with UGCs” IEICE Electron. Express, vol. 5, no. 17, pp. 657-661
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1D-Multi-scroll Chaotic Oscillator: Analysis, Simulation and Experimental
Results
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1D Multi-scroll Chaotic Oscillator
• Attractors via PWL Functions.Attractors via PWL Functions.