混沌系统集成电路的研究及设计

发布时间：2018-02-03 20:23

本文关键词： 集成电路混沌系统非线性电路电流模式电路同步电路　出处：《湘潭大学》2017年硕士论文　论文类型：学位论文

【摘要】：混沌电路作为混沌信号发生器可以产生真正意义上的连续混沌信号,具有重要理论意义也是工程应用的基础。由于混沌信号固有的特性,混沌电路被广泛应用于混沌保密通信和随机数发生器中。采用集成方式实现的混沌电路比用分立元件构建的混沌电路性能更优良。国外对于可集成混沌电路的研究始于上个世纪九十年代,目前已经集成实现经典系统如Chua’s系统、Lorenz系统和基于上述经典系统的混沌加密系统,对于多涡卷混沌电路的研究则不充分,没有文献提出基于多涡卷混沌系统加密系统的集成实现。基于上述原因,对可集成多涡卷混沌电路的研究具有一定理论意义和重要工程实践价值。本论文着重研究可集成多涡卷混沌电路以及基于多涡卷混沌系统的同步电路设计。在研究对比了以往电路结构的情况下,本文将跨导器和一种电流输入电流输出饱和函数电路结合,提出了一种电压输入电流输出饱和函数电路,该电路输出特性曲线可以被灵活调节,用其可以构成各种分段线性函数电路;在一种电压输入电流输出阶跃函数电路的结构上进行改进得到了一种电压输入电流输出迟滞函数电路,该电路的特性曲线滞环大小可以通过电压来调节,为实时改变混沌吸引子的分布提供了可能;在一种电流输入电流输出阶跃函数电路的基础上改进得到了一种电流输入电流输出迟滞函数电路,通过改变电路的偏置可以调整电路特性曲线;并且创新性地设计了电流模式混沌同步电路,由于采用电流作为电路的状态变量,简化了控制器的设计。本文分别仿真实现了电压模式混沌电路和电流模式混沌电路,结果表明相比于采用分立元件构建的混沌电路,采用集成方式设计的混沌电路具有更加优良的性能;同时电流模式混沌电路产生的混沌吸引子的频谱范围要大于电压模式混沌电路;相对于现有的电压模式混沌同步电路,提出的电流模式混沌同步电路可以简化控制器的设计。本论文采用TSMC 0.35微米工艺参数对所有的电路都进行了Pspice仿真分析,电路仿真结果与理论分析结果、数值仿真结果完全吻合,有效地证明本文电路的正确性。本文设计的集成型混沌电路由于具有低的电源功耗,宽的信号频率范围,可以广泛应用于混沌相关的实际工程领域。
[Abstract]:As a chaotic signal generator, chaotic circuit can produce real continuous chaotic signal, which has important theoretical significance and is the foundation of engineering application, because of the inherent characteristics of chaotic signal. Chaotic circuits are widely used in chaotic secure communication and random number generators. The performance of integrated chaotic circuits is better than that of discrete components. The investigation began on -10s. At present, classical systems such as Chua's system and chaotic encryption system based on the above classical system have been integrated, but the research of multi-scroll chaotic circuit is not sufficient. There is no literature on the implementation of the encryption system based on multi-scroll chaotic system, which is based on the above reasons. This paper focuses on the research of the integrated multi-scroll chaotic circuit and the design of the synchronization circuit based on the multi-scroll chaotic system. Compared with the previous circuit structure. In this paper, a voltage input current output saturation function circuit is proposed by combining the transconductors with a current input current output saturation function circuit. The output characteristic curve of the circuit can be adjusted flexibly. It can be used to form various piecewise linear function circuits. A voltage input current output hysteresis function circuit is obtained by improving the structure of a voltage input current output step function circuit. The hysteresis loop size of the characteristic curve of the circuit can be adjusted by voltage. It is possible to change the distribution of chaotic attractors in real time. Based on a step function circuit of current input current output, a current input current output hysteresis function circuit is obtained. The circuit characteristic curve can be adjusted by changing the bias of the circuit. And innovative design of current-mode chaotic synchronization circuit, because of the use of current as a state variable of the circuit. In this paper, the voltage mode chaotic circuit and the current mode chaotic circuit are simulated, the results show that compared with the chaotic circuit constructed by discrete elements. The integrated chaotic circuit has better performance. At the same time, the frequency range of the chaotic attractor produced by the current-mode chaotic circuit is larger than that of the voltage-mode chaotic circuit. Compared with the existing voltage-mode chaotic synchronization circuit. The proposed current-mode chaotic synchronization circuit can simplify the design of the controller. In this paper, all circuits are simulated and analyzed by Pspice using TSMC 0.35 micron process parameters. The simulation results are in good agreement with the theoretical analysis results and the numerical simulation results show the correctness of the circuit effectively. The integrated chaotic circuit designed in this paper has low power consumption. The wide frequency range of the signal can be widely used in the practical engineering fields related to chaos.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN402

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