混沌在高速、高分辨率A/D变换器应用中的研究

In this project we have reached the expected goal, studied the optimization and performance of the system, compared it to the ADC in existence, and drawn some useful conclusion. We have completed the studies of the operation principle, system structure and circuit design of chaotic ADC with high speed and high precision, the design and analysis of the system.with high robustness, high resolving power and high speed, error analysis and noise model of ADC and the comparison to the technique in existence. Studies have shown the insensitivity to the disturbances and high stability and resolving power of chaotic ADC, so can reduce the demand of.some key device greatly, and provide a new approach of analysis and design of ADC, and also point out the shortage of the traditional subranging ADC. Circuit simulations have shown that,when the unit gains band of the operation amplifier is 349MHz, using TTL in logic circuit, clock.frequency is 20MHz, and the sampling rate is 1.1MSPS, the precision of chaotic ADC can reach 19bit (single stage and iterated model). The research of this project can change to the next stage of practical application.Circuit

基于混沌系统对初始值的敏感和符号动力学的混沌编码方法，本项目提出了利用一阶映射混沌系统的高速、高分辩率的混沌A/D变换器的研究和研制，得用一阶映射系统的简单结构，剿饕恢指咚佟⒏叻直缏省⒏呔鹊哪Ｄ庑藕帕炕ˋ/D）的新方法，开拓混沌应用的新领域。涉及非线性影射和混沌A/D关键技术的理论研究、电路实现及电路优化设计和硬件研制。