基于电流传输器的蔡氏混沌电路的设计和实现

Design and realization of Chua's circuit based on current conveyers

针对传统的蔡氏混沌电路中的信号频率受限和电流信号波形不易测量的缺点,提出了用电流传输器实现的蔡氏电路.采用电流传输器实现了有源仿真电感和蔡氏分段线性电阻,使电路的性能更加稳定、工作频率提高.同时,不需要任何附加电路,就可以非常容易地测量和观察电路中的电流波形以及与电流有关的相图.对电路进行了设计、计算机仿真、硬件实现和实验测试.测试结果与计算机仿真结果一致,证明了电路的正确性和设计的有效性.本电路适用于保密通信.

A novel approach to Chua＇s circuit based on current conveyers is proposed which overcomes the difficulties of the signal frequency being too low and the current waves and the corresponding phase diagrams not easy to test for this kind of circuit. Active simulated inductor and piece-wise nonlinear resistor in the circuit are all realized by current conveyers,so that the circuit is more stable and can work in higher frequency than does the usual Chua＇s circuit. The circuit also has the advantages in that the current waves and the corresponding phase diagrams can be tested easily. The circuit has been designed,simulated,realized in hardware and tested. The experimental results are in good agreement with simulation results,which confirms the validity of the design. The circuit is suitable for secure communications.