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Simulators >> Circuit Simulators >> problem with "vpwlf" source in spectre
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Message started by ethan on Sep 28^th, 2006, 11:40am

Title: problem with "vpwlf" source in spectre
Post by ethan on Sep 28^th, 2006, 11:40am

Dear everybody,

I tried to use "vpwlf" source in Cadence Analog Simulation Environment. But I couldn't find the detailed on-line Cadence documentation regarding the format of the "pwlFile" in "vpwlf". And also where should I put real stimulus file "pwlFile" in order to let Spectre to read it?

I know "vpwl" source is similiar with "vpwlf". In netlist with "vpwl", it displays as:

V1 (node1 0) vsource type=pwl delay=xxxps wave=[0 0 500p 3.3 1n 3.3 1.5n 0........]

Since I have very long customized waveform need to be imported into Analog Simulation Environment to do simulation, then I generated my pwlFile with the format like [0 0 500p 3.3 1n 3.3 1.5n 0........] for "vpwlf" and put it under that netlist directory. But it seems it still doesn't correct with the format for "vpwlf". The spectre always complains the waveform for pwlFile is empty.

If I put that file under where I started the "icfb", the spectre complains there is no pwlFile.

Can somebody tell me what the pwlFile format is and where should I put it?

Many thanks.

ethan

Title: Re: problem with "vpwlf" source in spectre
Post by jbdavid on Sep 30^th, 2006, 1:21am

try spectre -help vsource
or look at the vsource documentation in the spectre reference ...
jbd

Title: Re: problem with "vpwlf" source in spectre
Post by sck236 on Oct 4^th, 2006, 9:53pm

Format for pwlf should be like the following

10n 2.5
20n 3.3
30n 2.2
35n 0
.....

And this file can be placed wherever you like.
But make sure that your vpwlf component has the correct link for the pwlf file.