真差分特性阻抗分析仪系统软件设计与实现

发布时间：2018-03-23 08:21

本文选题：时域反射计　切入点：特性阻抗　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着SATA、PCI Express、USB3.0等高速串行通信技术的快速发展,差分传输线在现代电子行业得到非常广泛使用,高速、高频、高密度化已成为电子行业技术发展重要趋势,电子科技大学过去几年自主研制的特性阻抗测试仪TDR ZK-2010,取样带宽只有5GHz,TDR带宽只有1.75GHz,不能满足柔性板、板内阻抗等需要测量2、3cm长度的要求,而且采用的算法伪差分技术在一些情况测量不准,并且会降低TDR性能。本课题研究目的是将过去多年的软件设计技术与经验和泰克真差分TDR仪器相结合,研发12GHz带宽(20GHz取样带宽)的高性能TDR真差分特性阻抗分析仪,其目的是以泰克仪器为平台研究真差分技术,完成真差分技术研究和相关软件开发,为后继自主研发10~20GHz取样带宽的TDR仪器奠定基础。本文首先分析了单端特性阻抗测试技术和真差分、伪差分、算法伪差分三种差分技术的差异,然后提出本课题的仪器总体设计方案以及基于标准I/O接口软件VISA的仪器控制技术,并从功能和性能两方面分析软件设计需求。然后根据面向对象程序设计思想设计了软件的总体方案和总体结构,对软件进行了模块划分。接下来本文对真差分特性阻抗校准与测试技术做了重点分析和相关研究,总结出详细的校准流程与设计方案,最后分模块对软件进行了详细设计与实现,重点在于主控程序中对于取样示波器的设置与同步,参数配置模块的实现,多线程的调配,数据传输模块设计,数据分析处理模块实现,以及校准流程与算法的具体实现。最后从功能、性能和测试结果三个方面对所设计的软件进行了详细的测试,验证了此系统满足了真差分特性阻抗测试的需求;同时也对行业的发展前景和后续的研究工作进行了展望。
[Abstract]:With the rapid development of high speed serial communication technology such as PCI Express USB 3.0, differential transmission line has been widely used in modern electronic industry. High speed, high frequency and high density have become an important trend in the development of electronic technology. The characteristic impedance tester TDR ZK-2010, developed by the University of Electronic Science and Technology in the past few years, has a sampling bandwidth of only 5 GHz and a TDR bandwidth of only 1.75 GHz, which cannot meet the requirements of the flexible plate, the in-board impedance, and so on. Moreover, the algorithm pseudo difference technique used in this paper is not accurate in some cases and will reduce the performance of TDR. The purpose of this study is to combine the software design technology and experience of the past years with the true differential TDR instrument. A high performance TDR true differential characteristic impedance analyzer with 12GHz bandwidth of 20 GHz is developed. The purpose of this instrument is to study true differential technology based on Teke instrument, and to complete the research of true differential technology and related software development. In this paper, we first analyze the difference of the single terminal characteristic impedance measurement technology and the true difference, pseudo difference, algorithm pseudo difference, and the difference of the three kinds of difference technology, such as true difference, pseudo difference, algorithm pseudo difference, etc. Then put forward the overall design of the instrument and the instrument control technology based on the standard I / O interface software VISA. The software design requirements are analyzed from the aspects of function and performance. Then, the overall scheme and structure of the software are designed according to the object-oriented programming idea. The software is divided into modules. Secondly, this paper analyzes and studies the impedance calibration and testing technology of true differential characteristic, and summarizes the detailed calibration flow and design scheme. Finally, the software is designed and implemented in detail, which focuses on the setting and synchronization of sampling oscilloscope, the realization of parameter configuration module, the deployment of multi-thread and the design of data transmission module in the main control program. The realization of data analysis and processing module, and the realization of calibration flow and algorithm. Finally, the designed software is tested in detail from three aspects: function, performance and test results. It is verified that the system meets the requirements of true differential impedance testing, and the future development of the industry and the future research work are also prospected.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM934.7

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