pnoise分析无法画出相位噪声图 || Can't plot phase noise

02015678

最近遇到了这个问题，感觉甚是奇怪，以前明明没有这个问题。CIW里大概会提示cannot handle nil ， cannot evaluate pnoise之类的问题。

好在通过谷歌搜索找到了答案，原来2006年就有国人问过这个问题了，当时问这个问题的人是CAO Zhiheng。
原帖来自：http://www.44342.com/cad-f228-t47-p1.htm

翻译成中文，简要的来说，就是不要用+、-这样的特殊字符，如果你的net都是英文字母，就不会出现这个诡异的问题。

Can't plot phase noise from pnoise result window in SpectreRF
Postby Zhiheng Cao » Thu, 16 Mar 2006 08:31:43 GMT

Dear Cadence,

I followed the instruction manual to simulate phase noise
of a LC oscillator, I run the pss analysis and pnoise analysis.
Then, when I try to plot results of pnoise, I can plot
"Output Noise", however, when I chose "Phase Noise" it
says
"Output nodes of pnoise analysis not saved for pss analysis.
As a result, the above selected function cannot be executed."

I have restarted Cadence, redrew the schematic, set
Output->Save All... and checked "all" everywhere, but I still
cannot plot phase noise. What is my problem?

Best Regards,

Zhiheng



Re: Can't plot phase noise from pnoise result window in SpectreRF
Postby Andrew Beckett » Wed, 22 Mar 2006 00:52:47 GMT


What version are you using (what does Help->About... in the CIW say)? I recall
this being a bug at some point in the past, which has been fixed.

I vaguely recall it being an issue if your output nodes contained odd
characters (such as "+" and "-"). If you stuck to alphabetic characters,
all was OK...

Andrew.

phoenixson

其实icfb里大部分的程序都是用skill脚本实现，而这些脚本或者以明文方式存在，或者以密文存在，如果能找到功能实现的脚本，那么大部分问题就迎刃而解

ralphtwtw

don;t know this issue !

jeffej

learning !!!

windbelll

非常感谢，

ZixunWang

谢谢分享！

tracy6969

thanks