单驱动式混沌编码A/D转换电路研究

为探讨混沌理论在数模转换(A/D)领域的应用,在考虑工作环境等因素造成混沌系统参数发生漂移的情况下,提出了一种新型的单驱动式混沌编码A/D转换电路．该转换电路基于混沌系统的初值敏感性和符号动力学,利用镜像恒流源的工作原理,采用三个性能一致的晶体管和若干二极管组成RC充放电回路。实验结果证实:该混沌编码A/D转换电路的初值与轨道距离之间具有良好的线性度,且结构简单,在没有任何补偿的情况下,转换分辨率能达到12位以上,并且易于集成化设计．

Study of Single-Driven Chaotic Code A/D Converter

To deeply discuss the application of Chaotic Theory to A/D conversion,the paper presents a novel single-driven chaotic code A/D converter with consideration of the drifting caused by working conditions of the chaotic system parameter,based on sensitive dependence on initial condition in chaotic systems and symbol dynamics,With the theory of mirror-image constant current circuit,three identical dynatrons and some of diodes are used to make up of the loops of charge and discharge in nonlinear RC oscillator. Experiment results indicate that the linear between initial values and distances of their orbits is better,simpler in structure,and more than 12-bit resolution can be achieved without any compensation and inexpensive elements.