《PADS软件基础与应用实例》书籍介绍 - EDA365电子工程师网

电路板设计也叫PCB设计，它以电路原理图为根据，实现电路设计者所需的功能。PADS软件是Mentor Graphics公司的电路原理图和PCB设计工具软件。目前，该软件是国内从事电路设计的工程师和技术人员主要使用的电路设计软件之一，是PCB设计高端用户最常用的工具软件。PADS作为业界主流的PCB设计平台，以其强大的交互式布局布线功能和易学易用等特点，在消费电子、半导体、通信、医疗电子等当前最活跃的工业领域得到广泛的应用。

本书由高校教师与从事PCB设计一线工程师合力编写。作为一线的教学人员，作者具有丰富的教学实践经验与教材编写经验，多年的教学工作使他们能够准确地把握学生的学习心理与实际需求。同时，从事多年PCB设计的工程师参与本书编写工作，他们年富力强，实践经验丰富，能够在编写工作中紧紧结合具体项目，理论结合实例。在本书中，处处凝结着教育者与工程师的经验与体会，贯穿着他们的教学思想与工程经验，希望能够给广大读者的学习（尤其是自学）提供一个简捷、有效的捷径。

本书以MentorGraphics最新推出的PADS 9.5中的PADS Logic、PADS Layout、PADS Router为基础，重点介绍PADS 9.5原理图与PCB设计的方法和技巧。本书通过“项目教学法”进行编写，通过实施一个完整的项目进行教学，把理论与实践教学有机地结合起来，充分发掘学生的潜能，提高学生解决实际问题的综合能力。全书共11章，主要内容包括：

在介绍的过程中，注意由浅入深，从易到难，图文并茂，语言简洁，思路清晰。通过对本书的学习，读者可以真切地体会出PADS在电路板设计内在的规律以及原理图和PCB设计的思路，从而进行电路板设计实践，提高电路板设计能力。

第1章 PADS软件的概述和安装···················································································· 1

1.1 基本技能··············································································································· 1

1.1.1 认识PADS软件···························································································· 1

1.1.2 PADS软件的安装和模块介绍··········································································· 2

1.2 基本知识··············································································································· 9

1.2.1 PADS软件中英文界面切换·············································································· 9

1.2.2 电子线路设计流程·························································································· 9

第2章 PADS Logic认知一：绘制单级共射放大电路原理图········································ 11

2.1 基本技能·············································································································· 11

2.1.1 PADS Logic的启动和操作界面认知·································································· 11

2.1.2 原理图标题栏制作························································································ 14

2.1.3 加载和卸载元件库························································································ 15

2.1.4 放置原理图元件··························································································· 18

2.1.5 原理图元件的连线························································································ 26

2.2 基本知识·············································································································· 31

2.2.1 项目文件管理······························································································ 31

2.2.2 原理图的一般设计流程和基本原则··································································· 31

第3章 PADS Logic认知二：元件库管理···································································· 34

3.1 基本技能·············································································································· 34

3.1.1 PADS元件库的结构······················································································ 34

3.1.2 创建元件库································································································· 35

3.1.3 加载已有的元件库························································································ 37

3.1.4 创建元件类型和逻辑封装··············································································· 38

3.1.5 电源符号的创建和管理·················································································· 54

3.2 基本技能·············································································································· 58

3.2.1 创建新的逻辑符号（以电阻为例说明创建逻辑符号过程）····································· 58

3.2.2 创建新的元件类型························································································ 62

第4章 PADS Layout认知一：元件库管理·································································· 67

4.1 基本技能·············································································································· 67

4.1.1 认识PCB Decal···························································································· 67

4.1.2 创建PCB封装····························································································· 67

4.2 基本技能·············································································································· 76

4.2.1 一般PCB封装的创建···················································································· 76

4.2.2 PCB封装的编辑··························································································· 88

4.2.3 快速、准确地创建PCB封装··········································································· 91

4.2.4 创建PADS封装的注意事项············································································ 94

第5章 PADS Layout认知二：单管放大电路PCB的设计············································ 99

5.1 基本技能·············································································································· 99

5.2 基本知识············································································································ 101

5.2.1 配置元件库································································································ 101

5.2.2 输入设计数据····························································································· 102

5.2.3 设计前准备································································································ 104

5.2.4 元器件的布局····························································································· 113

5.2.5 元器件的布线····························································································· 116

5.2.6 灌铜处理··································································································· 118

5.2.7 设计后期处理····························································································· 120

5.2.8 设计验证··································································································· 124

第6章 PADS Layout认知三：相关文件输出··························································· 130

6.1 基本技能············································································································ 130

6.2 基本知识············································································································ 145

6.2.1 光绘文件输出····························································································· 145

6.2.2 IPC网表输出····························································································· 146

6.2.3 ODB文件输出··························································································· 146

6.2.4 钢网文件和贴片坐标文件输出········································································ 147

6.2.5 装配文件输出····························································································· 152

第7章开关电源转换电路PCB的设计······································································· 158

7.1 基本技能············································································································ 158

7.1.1 开关电源转换电路原理图设计········································································ 158

7.1.2 开关电源转换电路PCB的设计······································································ 160

7.2 基本知识············································································································ 167

7.2.1 散热过孔的处理·························································································· 167

7.2.2 绘制和修改铜箔·························································································· 168

7.2.3 PCB增加螺丝孔························································································· 171

第8章 PADS Router认知：布线操作······································································· 175

8.1 基本技能············································································································ 175

8.1.1 PADS Layout与PADS Router的连接······························································· 175

8.1.2 PADS Router操作界面认知··········································································· 176

8.2 基本知识············································································································ 178

8.2.1 PADS Router环境参数················································································· 178

8.2.2 PADS Router设计规则················································································· 185

8.2.3 元件布局··································································································· 187

8.2.4 交互式手工布线·························································································· 190

8.2.5 自动布线··································································································· 191

8.2.6 PADS Router设计验证················································································· 196

第9章毕业设计1：LED摇摇棒制作实例································································· 200

9.1 基本技能············································································································ 200

9.1.1 单片机AT89S51的认识和创建······································································· 200

9.1.2 LED摇摇棒原理图设计················································································ 203

9.1.3 LED摇摇棒PCB设计·················································································· 205

9.2 基本知识············································································································ 205

9.2.1 单面板的认识····························································································· 205

9.2.2 布局应用技巧-固定特定元器件······································································ 206

9.2.3 布线应用技巧-栅格法布线············································································ 207

9.2.4 布线应用技巧-热焊盘设置············································································ 207

9.2.5 布线应用技巧-增加泪滴··············································································· 208

9.2.6 铺铜应用技巧-铺铜效果··············································································· 210

第10章毕业设计2：TDA2030加音调音响放大器·················································· 212

10.1 基本技能··········································································································· 212

10.1.1 功放电路元件库的创建··············································································· 212

10.1.2 功放电路原理图设计·················································································· 213

10.1.3 功放电路PCB的设计················································································· 214

10.2 基本知识··········································································································· 215

10.2.1 模拟电路布局··························································································· 215

10.2.2 PCB的接地设计························································································ 216

10.2.3 手工制作电路板························································································ 216

10.2.4 装焊元器件······························································································ 217

10.2.5 半成品组装和功能调试··············································································· 217

第11章毕业设计3：USB HUB制作实例································································· 218

11.1 基本技能··········································································································· 218

11.1.1 USB HUB原理图设计················································································ 218

11.1.2 USB HUB PCB设计··················································································· 219

11.2 基本知识··········································································································· 220

11.2.1 差分线设置及布线技巧··············································································· 220

11.2.2 Logic与Layout交互布局············································································· 222

11.2.3 布线应用技巧-快速创建差分对····································································· 223

11.2.4 差分线验证设计························································································ 225

附录1 PADS软件设计命令及快捷键汇总表································································· 226

附录2 计算机辅助设计（CAD）电类（中级）考核大纲··············································· 231

附录3 计算机辅助设计(CAD)电类（中级）技能鉴定评分表········································· 233

附录4 计算机辅助设计(CAD)电类（中级）样题·························································· 234