The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Simulators >> Circuit Simulators >> Plotting operating points with time
https://designers-guide.org/forum/YaBB.pl?num=1159012341

Message started by rupam on Sep 23^rd, 2006, 4:52am

Title: Plotting operating points with time
Post by rupam on Sep 23^rd, 2006, 4:52am

Hi all,

Any idea how to get the plot of transistor vth versus time from transient analysis ? :-[ Please help. I am in a fix over this

Regards,
Rupam

Title: Re: Plotting operating points with time
Post by ACWWong on Sep 24^th, 2006, 12:19pm

if you are using spectre, you can use infotimes to save dc operating point parameters (like vth) at certain times within a transient.
try spectre -h tran or look it up in the spectre manual in the installation path.

Title: Re: Plotting operating points with time
Post by John O Donovan on Sep 24^th, 2006, 5:18pm

Hi,

The Spectre "save" statement should be used. "infotimes" is not really suitable for this.

save m1:gds r1:pwr

The operating point variables will be saved in the rawfile with your regular voltage/currents and
can be plotted as usual.

John

Title: Re: Plotting operating points with time
Post by ACWWong on Sep 26^th, 2006, 4:12am

yes the save method is the correct method!
if using the ADE GUI it used to be possible to add the statement into the modelfile setup, but now you need to include in a setup->simulation file and access the data via results browser or getData( "I0:vth" ?result "tran-tran").

Title: Re: Plotting operating points with time
Post by rupam on Sep 27^th, 2006, 8:05pm

Hi,

Thanx a lot !!! It worked ;D