一种基于映射结构的新颖A/D转换器的研究和仿真

Research on a Novel Architecture of ADC Based on Nonlinear Map and Its Simulations

本文研究了一种新型的混沌A/D转换器 ,这是一种基于非线性映射结构的非流水式ADC ,并提出基于开关电容的ADC电路设计 .理论分析和实验仿真表明本文所提出的A/D转换器克服了流水结构A/D变换器多级之间的增益匹配和每级中A/D和D/A变换之间的匹配等主要影响精度的设计问题 ,具有对噪声干扰不敏感等特性 ,降低了对部分元器件的精度等要求 。

This paper proposes a novel chaotic ADC,which is a kind of non pipeline ADC based on nonlinear map,and the circuit design based on switch capacitance for this ADC is also proposed.The theoretic analysis and simulated results show that the ADC proposed overcomes the problems of the gain mismatches between stages and the mismatches between A/D and D/A in single stage in the pipeline ADC,which severely infect the precision of ADC,and is not sensitive to noises and the requirements in precision for some components used for the system.Therefore,with this approach we may achieve a conversion at high speed and precision.