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A method to design a fast chaotic oscillator using CCTA
Chandan Kumar Choubey1, Aruna Pathak2, Manoj Kumar Tiwari3
1Symbiosis Institute of Technology, Pune Campus, Symbiosis International (Deemed University), Pune, India.
Methodsx
|July 18, 2024
Summary
A new Current Conveyor Transconductance Amplifier (CCTA) based Chua
Area of Science:
- Nonlinear Dynamics and Chaos Theory
- Analog Circuit Design
- Integrated Circuit Engineering
Background:
- Designing fast chaotic oscillators is crucial for applications requiring complex signal generation.
- Existing methods face challenges in high-speed operation, nonlinear dynamics, and component selection.
- Chua's circuit is a foundational model for chaotic oscillators.
Purpose of the Study:
- To introduce a novel method for designing a high-frequency chaotic oscillator.
- To utilize a Current Conveyor Transconductance Amplifier (CCTA) for a simplified Chua's circuit.
- To validate the design through advanced simulations and analysis.
Main Methods:
- Design of a nonlinear negative resistance using CCTA.
- Integration of CCTA, capacitors, resistors, inductor, and potentiometer.
- Simulation using PSPICE with 180nm CMOS technology and macro-models.
Main Results:
- Achieved a dominant operating frequency of 37.5MHz via Fast Fourier Transform (FFT) analysis.
- Demonstrated various chaotic behaviors including double-scroll and Rössler-type attractors by varying resistance.
- Monte Carlo simulations confirmed robustness with low voltage variations (≤5.21%).
Conclusions:
- A novel, high-frequency Chua's chaotic oscillator using a single CCTA block was successfully designed.
- The proposed design achieves a record operating frequency for CCTA-based chaotic oscillators.
- The circuit's reliability and potential for diverse chaotic signal generation applications are confirmed.
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