毕业设计（论文）-等效采样中的一种时延调整技术.docVIP

目 录 摘要 1 Abstract 1 1绪论 3 1.1概述 3 1.2等效采样技术在测控领域类的发展概况 4 1.3等效采样技术在数据采集器中的发展及应用 5 1.4等效采样技术具体的应用实例 6 2等效采样的介绍 8 2.1两种采样方式 8 2.2实时采样 8 2.3等效采样 8 2.4等效采样的分类 8 2.5顺序等效采样 8 2.5．1基于延时单元的顺序等效采样 9 2.6随机等效采样 11 2.6.1基于游标卡尺原理的随机等效采样 12 2.6.2基于双斜率电容充放电原理的随机等效采样 14 3延时系统的整体设计 15 3.1延时系统的基本原理 16 3.2时延调节模块的具体设计 18 3.3整个过程的简单流程图 18 3.4设计方案所用器件的选择 19 3.4.1 ADC的选择 20 3.4.2FPGA的选择 20 总结 21 参考文献 21 致 谢 22 等效采样中的一种时延调整技术 通信工程 刘治 2006级 摘要：随着数字时代的到来，数字信号已经成为主流。而对模拟信号的采集是模数转换这一过程中特别关键的一个部分。传统的实时采样方式面临着一个重大的问题，就是不能完成对高频信号的采集。所以等效采样技术就被提出来。 本文首先对等效采样这一技术在现阶段的发展做了介绍，包括国外的发展状况，以及国内的发展状况。列举了几个具体的应用实例。然后详细介绍了几种采样方式：实时采样，顺序等效采样，随机等效采样。对每一种采样方式的优缺点都都进行了说明，并且比较了这三种采样方式。能够让非专业的读者对等效采样这一技术有一个大概的了解。最后，根据分析比较，结合顺序等效采样和随机等效采样的优点，提出了一种新颖的采用时延调整技术实现等效采样的方法，其等效采样率指标高达几十GSPS级，大大的提高了对信号细节的观察能力。文章对于该方案的原理进行了详细的阐述，其中对于时延模块又做了重点介绍，并给出了整个系统的流程图。 关键字：实时采样; 等效采样; 顺序等效采样; 随机等效采样; 时延 An technology of Time-Delay Regulating in equivalent sampling communication engineering ,Liu Zhi ,Grade 2006 Abstract：With the digital age, the signals has become the mainstream. Data acquisition is a special key in AD conversion technology. Traditional real-time sampling methods are facing a major problem, it cant finish the high frequency of the gathering. Therefore, the equivalent skill was put out artificially. At first, this article simple introduce the development of the technology at present, including overseas development and domestic development. And then show some application examples based on the technology. Then, this article detailed introduce three kinds of sampling methods ： real-time sample, equivalent sample sequence, random sampling, random sampling. Each sampling has advantages and disadvantages. The article have an detailed compare among them. Everyone who have read this article may knows what is equivalent sample technology. At last, according to compare the advantage and disadvantage between sequential sampling and random sampling in high speed data acquiring，a new equivalent sampling with