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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.

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Summary
This summary is machine-generated.

A new Current Conveyor Transconductance Amplifier (CCTA) based Chua

Keywords:
Analog building blockAnalog circuitChua's circuitDesign a fast chaotic Oscillator using CCTAFast oscillationNegative resistanceNon-linear resistor

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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.