PADS 中阻抗延时、长度的计算方法
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<p class="MsoNormal"><span lang="EN-US" style="font-size: 10pt; font-family: Tahoma;">楼主文件内容如下:</span></p><p class="MsoNormal"><span lang="EN-US" style="font-size: 10pt; font-family: Tahoma;">powerpcb
</span><span style="font-size: 10pt; font-family: 宋体;">中本身自带有特性阻抗计算的功能</span><span lang="EN-US" style="font-size: 10pt; font-family: Tahoma;">,</span><span style="font-size: 10pt; font-family: 宋体;">用法如下：</span><span lang="EN-US" style="font-size: 10pt; font-family: Tahoma; color: white;"></span><span lang="EN-US" style="font-size: 10pt; font-family: Tahoma;"><br/>
1</span><span style="font-size: 10pt; font-family: 宋体;">、在</span><span lang="EN-US" style="font-size: 10pt; font-family: Tahoma;">setup/layer
definition </span><span style="font-size: 10pt; font-family: 宋体;">中把需要定义为地或电源层相应层定义为</span><span lang="EN-US" style="font-size: 10pt; font-family: Tahoma;">CAM PLANE </span><span style="font-size: 10pt; font-family: 宋体;">。</span><span lang="EN-US" style="font-size: 10pt; font-family: Tahoma; color: white;"></span><span lang="EN-US" style="font-size: 10pt; font-family: Tahoma;"><br/>
2</span><span style="font-size: 10pt; font-family: 宋体;">、并在</span><span lang="EN-US" style="font-size: 10pt; font-family: Tahoma;">layer
thinkness </span><span style="font-size: 10pt; font-family: 宋体;">中输入你的层叠的结构，比如各层的厚度、板材的介电常数等。</span><span lang="EN-US" style="font-size: 10pt; font-family: Tahoma; color: white;"></span><span lang="EN-US" style="font-size: 10pt; font-family: Tahoma;"><br/>
</span><span style="font-size: 10pt; font-family: 宋体;">通过以上的设置，选定某一根网络并按</span><span lang="EN-US" style="font-size: 10pt; font-family: Tahoma;">CTRL+Q </span><span style="font-size: 10pt; font-family: 宋体;">，就可以看到该网络相关的特性阻抗、延时、长度等。</span></p> 学习一下 非常需要 kan xia 123 <strong>逻辑封装规格书</strong>