文档介绍：摘要
由于数字电子技术的迅速发展,尤其是数字计算和信号处理技术在医疗成像、仪器仪表、通讯等领域的广泛应用,用数字电路处理模拟信号的情况口益普遍。所以模拟信号数字化是信息技术的发展趋势,而模数转换器(ADC)在其中扮演着重要角色。
文章首先介绍了ADC在现代电子技术中的起源、发展、地位、作用和技术前景。也对ADC的参数进行了介绍和评述,同时介绍了几种常见结构的模数转换技术,比较了不同结构模数转换器的优缺点,最终选择了双积分结构的ADC作为研究重点。论文从基本原理开始,通过分析双积分ADC的系统结构特点和其结构中的非理想特性,对双积分ADC中的各个模块进行分析、设计和优化。对于模拟部分,根据ADC性能指标要求,通过对ADC的误差分析,得到了运放的增益和带宽约束。数字方面,与传统时序逻辑器件相比,采用了简洁的元件组合来实现逻辑功能,节省了芯片面积和功耗。本设计已流片,文章在此基础上介绍了实际芯片的应用及简单测试结果,并在应用上对重要注意事项进行了分析说明,最后得出了结论。
关键词:模数转换器;双积分;运算放大器;数字控制逻辑
Abstract
With high-speed development of digital technology, especially the increasing use of puting and signal processing technology in applications such as medical imaging, instrumentation and munications, it is mon to deal with analog signal with digital circuits. So digitalizing analog signal is the trend of information technology, in which ADC plays an important role.
Firstly, this thesis introduces appearance, development, function and technical prospect of ADC in the modern electronic technology. The thesis aslo states the Meanwhile, several kinds of ADC system and their characteristics are studied in this thesis. Then choose the duel-slope ADC as an object to study. Beginning with the principle of the duel-slope ADC, the thesis analyzes its function and characteristics then puts the system into some sub-modules to further research. The operational-amplifier's constraints of gain and bandwidth can be deduced by analyzing the error of the ADC. While in the digital part, it is been aborded ponents to realize the same logic parable to traditional circuit, which saves the areas and depletion of the chip. The author finishes the measurement of the ADC and the typical application design, and introduces the application notes. Finally the es out.
Key words: Analog-to-digital converter; Duel-slope; Op amplifer; Digital control
目录
第1章绪论 1
ADC的发展及应用 1
本设计的目的及意义 1
本文所做的工作 2
第2章 ADC的体系结构 3
现阶段主要ADC简介 3
3
逐次逼近型ADC 4
流水线型ADC 5
芯片的系统规划 6
模拟部分系统结构 6