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first transient ---> save final condition ----> second transient (Read 4396 times)
devilmaysmile
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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
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Ken Kundert
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Re: first transient ---> save final condition ----> second transient
Reply #1 - Aug 21st, 2014, 3:24pm
 
try using 'writefinal' on the first transient analysis.

-Ken
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devilmaysmile
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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?
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Ken Kundert
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Re: first transient ---> save final condition ----> second transient
Reply #3 - Aug 26th, 2014, 2:09pm
 
I cannot understand your question.
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