The Designer's Guide Community
Forum
Welcome, Guest. Please Login or Register. Please follow the Forum guidelines.
Jun 27th, 2022, 11:26pm
Pages: 1
Send Topic Print
first transient ---> save final condition ----> second transient (Read 3938 times)
devilmaysmile
New Member
*
Offline



Posts: 2

first transient ---> save final condition ----> second transient
Aug 20th, 2014, 12:18am
 
Hi all,

I have a requirement as follows:

1) I need to run transient analysis and save the final condition of the node.

2) Use the final condition of the first transient as the initial condition for the next analysis which is another transient analysis.

I am using Cadence Spectre.

I tried this method:

-start a transient analysis (OUTPUT PARAMETERS save all)
-start a second transient analysis (INITIAL CONDITION PARAMETERS readic -> spectre.fc)

in a very simple circuit (single RC circuit), but the final voltage of the capacitor in first transient analysis doesn't correspond to the initial condition of the second transient analysis.

Any ideas?

Thanks!!

-Devilmaysmile
Back to top
 
 
View Profile   IP Logged
Ken Kundert
Global Moderator
*****
Offline



Posts: 2336
Silicon Valley
Re: first transient ---> save final condition ----> second transient
Reply #1 - Aug 21st, 2014, 3:24pm
 
try using 'writefinal' on the first transient analysis.

-Ken
Back to top
 
 
View Profile WWW   IP Logged
devilmaysmile
New Member
*
Offline



Posts: 2

Re: first transient ---> save final condition ----> second transient
Reply #2 - Aug 26th, 2014, 1:49am
 
Thanks for reply, so in the first transient i have to use the value in  ´writefinal´(spectre.fc) ? I write in ´readic´ the value (spectre.fc) or in other part of the option simulation?
Back to top
 
 
View Profile   IP Logged
Ken Kundert
Global Moderator
*****
Offline



Posts: 2336
Silicon Valley
Re: first transient ---> save final condition ----> second transient
Reply #3 - Aug 26th, 2014, 2:09pm
 
I cannot understand your question.
Back to top
 
 
View Profile WWW   IP Logged
Pages: 1
Send Topic Print
Copyright 2002-2022 Designer’s Guide Consulting, Inc. Designer’s Guide® is a registered trademark of Designer’s Guide Consulting, Inc. All rights reserved. Send comments or questions to editor@designers-guide.org. Consider submitting a paper or model.