pcb电路板设计毕业设计论文

大庆石油学院应用技术学院毕业论文

PCB电路板设计研究

学科专业：应用电子专业

学生：

指导教师：

入学日期：[2008]年[9]月论文完成日期：[2011]年[3]月

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摘要

PCB是电子工业重要的电子部件之一，几乎每种电子设备，小到电子手表，计算器，大到计算机，通讯电子设备，军用的武器系统，只要有集成电路等电子元器件，为了它们之间电气互连，都要使用电路板。在较大型的电子产品研制过程中，最基本的成功因素是该产品的电路板的设计、文件编制的制造。

PCB的功能为提供完成第一层级构装的组件与其它必须的电子电路零件接合的基地，以组成一个具特定功能的模块或成品。所以PCB在整个电子产品中，扮演了整合连结总其成所有功能的角色，也因此时常电子产品功能故障时，最先被质疑往往就是PCB。那么为什么在电路板的印制和使用中会出现这样或那样的故障呢？问题的关键就在于PCB电路板的设计环节。电路板设计是从电路原理图变成一个具体产品的必经之路门。电路版设计的合理性与产品的生产及质量密切相关。

PCB制造行业作为电子信息行业的上游行业，近两年受消费类电子尤其是手机、PC等的拉动，国际和国内的PCB行业都进入了景气上升阶段，未来随着3G 手机的应用和数字电视销量的迅猛增长，PCB行业的景气度将进一步高涨。

所以，PCB制造行业的发展前景将不可估量！

关键词：PCB；电路板设计；上游行业；电子信息

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目录

摘要·································································································I 第1章PCB概述 ············································································１

1.1PCB的发展史·······································································１

1.2PCB的作用 ········································································１

1.3PCB的分类··········································································２第2章PCB的构造 ·········································································５

2.1PCB的层次结构····································································５

2.2PCB的部件··········································································５

2.3PCB特定名词·······································································７第3章PCB的设计············································································９

3.1PCB的布局设计····································································９

3.1.2布局原则··········································································９

3.2PCB的布线设计·································································１０

3.3地线设计 ··········································································１１

3.4电磁兼容性设计···································································１２

3.5电源噪声设计 ······································································１３第4章高速PCB设计 ····································································１６

4.1什么是高速电路 ···································································１６

4.2高速信号的确定 ···································································１６

4.3什么是传输线 ······································································１７

4.4传输线效应 ·········································································１７

4.4.1反射信号 ······································································１７

4.4.2延时和时序错误 ·····························································１７

4.4.3多次跨越逻辑电平门限错误 ··············································１７

4.4.4过冲与下冲 ···································································１８

4.4.5串扰 ············································································１８

4.4.6电磁辐射 ······································································１８

4.5避免传输线效应的方法···························································１８第5章PCB设计实例 ·····································································２０

5.1数控直流电流源的简介···························································２０

5.2数控直流电流源的PCB制作····················································２０

5.2.1Protel99软件简介··························································２０

5.2.2设计步骤 ······································································２０参考文献······················································································２３致谢····························································································２４

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