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This paper presents the design and realization of Chaotic circuit using AD712 opamp [1], FTFN (Four Terminal Floating Nullor) [2], VDTA (Voltage Differential Transconductance Amplifier) [3] and their hybrid realizations [4]. A chaos generator, modeled after Chua’s circuit, is developed using five distinct circuit architectures. The circuits are simulated in LTSpice, and synchronization between transmitter and receiver is achieved through chaos synchronization techniques. The recovered message signals are evaluated for fidelity. Furthermore, the chaotic oscillator is utilized in a secure communication scheme by synchronizing two identical oscillators. In this approach, a Chua circuit-based transmitter integrated with a buffer, summer, and inverter transmits the message signal, which is successfully recovered at the receiver via chaos synchronization using a buffer and subtractor, demonstrating the system’s effectiveness for secure analog communication.

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Realization of Chaotic Circuit Using Different Analog Building Blocks and Its Use in Secure Communication

  • 会议论文

  • 发表日期：

    2026年

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  • Brij Nandan Singh,
  • Kriti Suneja

摘要

This paper presents the design and realization of Chaotic circuit using AD712 opamp [1], FTFN (Four Terminal Floating Nullor) [2], VDTA (Voltage Differential Transconductance Amplifier) [3] and their hybrid realizations [4]. A chaos generator, modeled after Chua’s circuit, is developed using five distinct circuit architectures. The circuits are simulated in LTSpice, and synchronization between transmitter and receiver is achieved through chaos synchronization techniques. The recovered message signals are evaluated for fidelity. Furthermore, the chaotic oscillator is utilized in a secure communication scheme by synchronizing two identical oscillators. In this approach, a Chua circuit-based transmitter integrated with a buffer, summer, and inverter transmits the message signal, which is successfully recovered at the receiver via chaos synchronization using a buffer and subtractor, demonstrating the system’s effectiveness for secure analog communication.