Σ-Δ型A/D转换器基本原理解析  

The Basic Principle Analysis of the Sigma-Delta ADC

作　　者：张林 邓天平 秦臻 罗杰 ZHANG Lin;DENG Tianping;QIN Zhen;LUO Jie(School of Electronic Information and Communications,Huazhong University of Science&Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学电子信息与通信学院,武汉430074

出　　处：《电气电子教学学报》2023年第6期102-105,共4页Journal of Electrical and Electronic Education

基　　金：湖北省高校教学研究项目(2018049);华中科技大学教学研究项目(2020018)。

摘　　要：Σ-Δ型A/D转换器以其独特的优势,广泛应用于转换速率在每秒百千次以下的场景中。其核心Σ-Δ调制器虽然结构简单,但工作原理却不易理解,我们独辟蹊径,从初学者易于理解的角度切入,进行原理阐述,然后回归到实际的结构图,最后给出了Σ-Δ调制器的PSpice仿真验证,解决了初学者理解Σ-Δ型A/D转换器工作原理的难题。The Sigma-Delta ADC with its unique advantages,is widely used in the situation where the conversion rate is less than 100 thousand times per second.Although the Sigma-Delta modulator that is the core of this kind of ADC has a simple structure,its working principle is not easy to understand.We explores a new way,starts from the perspective that beginners are easy to understand,expounds the Sigma-Delta modulator principle,and then returns to the actual structure diagram.Finally,the PSpice simulation verification of the Sigma-Delta modulator is given.The difficult problem that beginners understand the working principle of the Sigma-Delta ADC is solved.

关 键 词：A/D转换器 Σ-Δ调制器 量化器 

分 类 号：TN710[电子电信—电路与系统]