模拟/数字数据转换器(Analog-to-Digital Converter,ADC)是连接模拟世界与数字世界的桥梁,随着设计技术和制造工艺的发展,其各项性能指标有了长足的进步.本文首先介绍ADC的分类和性能特点,随后从高速ADC和高精度ADC两个设计方向,阐述不同结构ADC的基本原理和技术发展.在高速ADC方向,本文聚焦于SAR ADC和Pipelined SAR ADC的性能优化技术,如CDAC控制方法和比较器设计、非二进制冗余、环路展开以及级间冗余等.在高精度ADC方向,本文分析了Delta-Sigma ADC的多种类型和优缺点,并介绍了Zoom ADC、NS-SAR ADC的技术特点.本文还总结了一些新型的混合架构ADC,介绍它们的组成和研究进展.
An Overview of High Performance Analog-to-Digital Converters
Analog-to-Digital Converter(ADC)is the bridge connecting the analog world and the digital world.With the development of circuit techniques and manufacturing process,its performance indicators have made great progress.The classification and performance characteristics of ADCs are firstly introduced,and then a description is made on the basic principles and technological development of ADCs of different structures including directions:high-speed and high-resolution ADCs.For high-speed ADCs,this article focuses on performance optimization techniques for SAR ADCs and Pipelined-SAR ADCs,such as CDAC controlling methods and comparator design,non-binary redundancy,loop-unrolled,and inter-stage redundancy.For high-resolution ADCs,the various types of Delta-Sigma ADCs and their advantages are analyzed,and the technical characteristics of Zoom ADCs and NS-SAR ADCs introduced.Some new types of hybrid-architecture ADCs are also summarized,describing their composition and research progress.
analog to digital converter(ADC)high-speed ADCpipelinehigh-resolution ADChybrid-architecture ADC
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