花生，能用MC求等效内阻吗？
能否用MC分别求出输入5脚，输出4脚的等效内阻吗？http://cache.amobbs.com/bbs_upload782111/files_46/ourdev_684491J1W74U.JPG
(原文件名:求等效电阻.JPG)
点击此处下载 ourdev_684492UTXXP7.rar(文件大小:5K) (原文件名:R2R.rar) 直流阻抗。。这样？
http://cache.amobbs.com/bbs_upload782111/files_46/ourdev_684507HZ3KR3.png
(原文件名:2011-10-13 12 35 13.png)
那个是节点，不是“脚”。
咋感觉不对呢？？？迷糊了。
另，关于交流阻抗测试，官方的FAQ链接：
http://www.spectrum-soft.com/faq/help/faq1.shtm
How do I plot the input or output impedance of my circuit in AC analysis?
The input and output impedance of the circuit must be plotted in an indirect way.
Go under the Component/Analog Primitives/Waveform Sources section. Select the source called Current Source.
This is the SPICE independent current source. Place this source across the nodes where you want to measure the impedance.
The Value attribute of the Current Source should be defined as 'AC 1'. This provides a 1A AC current source for AC analysis.
Enter AC analysis. In the AC analysis limits, as the Y-Expression, place the expression:
V(Iname)
where Iname is the Part attribute name of the current source.
Since the current is 1A, the voltage across the current source is equivalent to the impedance,
so this expression will produce the impedance plot. 收到，先看看。
感觉不对，找一下公式好吗 apply an ac voltage to a node, and plot 1/I(ac) on that node over the frequency domain.
that's your impedance vs. frequency. millwood0 好像总是半夜才上论坛哈。。
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