The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Simulators >> Circuit Simulators >> how to get the frequency variable
https://designers-guide.org/forum/YaBB.pl?num=1246403791

Message started by .matteo on Jun 30^th, 2009, 4:16pm

Title: how to get the frequency variable
Post by .matteo on Jun 30^th, 2009, 4:16pm

Hi everybody,
I am simulating the time delay of a feedback path and I would like to plot 'phaserad(mycurrent)/(2*pi*frequency) in order to have a plot of the time delay as a function of the frequency.

The problem is that when write "freq" and try to plot it I get an error of unbounded variable. Does anybody know how to get the frequency variable from an AC simulation?

Thank you very much
-Matteo

Title: Re: how to get the frequency variable
Post by .matteo on Jun 30^th, 2009, 4:48pm

I use Spectre on Virtuoso Analog Design Environment (ADE L)

Title: Re: how to get the frequency variable
Post by pancho_hideboo on Jun 30^th, 2009, 4:55pm

.matteo wrote on Jun 30^th, 2009, 4:16pm:

The problem is that when write "freq" and try to plot it I get an error of unbounded variable.
Does anybody know how to get the frequency variable from an AC simulation?

What vendor's simulator do you use ?

There are many simulators which have AC analysis. And there are many data format as output from simulator.
http://www.synopsys.com/Tools/Verification/AMSVerification/DesignAnalysis/Documents/waveview_analyzer_ds.pdf

http://www.designers-guide.org/Forum/YaBB.pl?num=1196459940/1#1
http://www.designers-guide.org/Forum/YaBB.pl?num=1106643861/1#1
http://www.designers-guide.org/Forum/YaBB.pl?num=1205240723/9#9

Title: Re: how to get the frequency variable
Post by .matteo on Jun 30^th, 2009, 5:06pm

Thanks a lot, the function xval() is exactly what I wasl looking for!
-Matteo