一种基于符号动力学的新颖混沌A/D转换器的设计

A Novel Design of Chaotic A /D Converter Based on Symbolic Dynamics

为了消除混沌A/D转换过程中的迭代误差提高转换精度,通过分析基于动力学系统的混沌A/D转换器的工作原理,提出了一种新的混沌映射方程。运用一种新颖的误差自补偿的方法,实现了信号放大与A/D转换的一体化设计。该电路采样速率达80 ksample/s^130 ksample/s,转换精度达16 bit。并运用PSPICE对电路进行了仿真,结果表明该方法是可行的,为混沌A/D转换器的研究作了进一步的探索。

In order to eliminate the chaos iteration error and improve the conversion accuracy of the A/D conversion, the working principle of chaotic A/D converter is analyzed based on symbolic dynamic system, therefore a new equation of chaotic mapping is put forward. A new error self-compensation method is used to realize the integrated design of signal amplifying and A/D conversion. The system＇s sampling rate is 80 ksample/s - 130 ksample/s,resolution is 16 bit. Circuit simulation has been made by use of PSPICE. The results show that the method is feasible. This is helpful for further exploration and research of the chaotic A/D converter.