way to export a small time span of a big transient simulatio

[Fritz Lange]

Hy,

I have the following problem:

I am doing large transient simulations of a CDR/PLL circuit with spectre.
I get large result files (ca.2 Gbyte) for a simulation of 2us.

Now I want to have a look on the results of the last 200ns or maybe the
period from 400ns to 800ns.

Is there a way to extract these time spans in another simulation data base
(.psf file) to get smaller data bases (with a 2 Gbyte file an analysis with
the calculator plus waveform window is very very too slow)

best regards and thx for any help

Fritz

 

[S. Badel]

there is a parameter to the transient analysis called 'outputstart'.
Output is saved only after the specified time is reached.
this allows you to save in the output file only the part in which you
are interested. however, this won't allow you to create multiple
files for different time slices.

if you want to do so, maybe you could do this :
in the simulator input file, add multiples analysis statements.
save the final state of every simulation (writefinal parameter)
and set it to be the initial state of the next one (readic parameter).
then, choose a different output file for each simulation.

hope this helps,

stéphane


"Fritz Lange" <ndodel@web.de> wrote in message
news:c1clag$1d8$1@news.cs.tu-berlin.de...

Hy,

I have the following problem:

I am doing large transient simulations of a CDR/PLL circuit with spectre.
I get large result files (ca.2 Gbyte) for a simulation of 2us.

Now I want to have a look on the results of the last 200ns or maybe the
period from 400ns to 800ns.

Is there a way to extract these time spans in another simulation data base
(.psf file) to get smaller data bases (with a 2 Gbyte file an analysis
with
the calculator plus waveform window is very very too slow)

best regards and thx for any help

Fritz