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Simulators >> Circuit Simulators >> Different netlist produced from spectre & spectreS
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Message started by kamesh419 on May 20^th, 2005, 8:12am

Title: Different netlist produced from spectre & spectreS
Post by kamesh419 on May 20^th, 2005, 8:12am

Dear all,

Why is it that the netlist produced for Spectre and SpectreS different for the same design and in what way they are different ?

Thanks and Regards,
Kamesh.

Title: Re: Different netlist produced from spectre &
Post by Ken Kundert on May 20^th, 2005, 12:12pm

SpectreS is the remnants of an ancient hack in which a parameterized netlist was generated for CadenceSpice, which evaluated all the expressions and produced a new netlist for Spectre will all parameters removed. This was a very complicated affair that involved partially flattening the design. It should have been removed from Artist years ago.

I recommend that you completely ignore SpectreS.

-Ken

Title: Re: Different netlist produced from spectre &
Post by kamesh419 on May 23^rd, 2005, 8:27am

Thanks Ken for your reply. I am trying to use Spectre now but I have the following problem.

I am trying to simulate a design. All works well with "spectreS" simulator, but when it comes to "spectre" then I get an error.

Quote:

Error found by spectre during circuit read-in.
"input.scs" 8: Unable to open library file
`/opt/eda/xfab/spectre/xc06/xc06.scs'.
No such file or directory.

spectre terminated prematurely due to fatal error.

I am using XFAB 0.6u technology and the folder xc06 corresponds to that. I have checked that the library file xc06.scs file indeed does not exist.

Why is it that it works well with "spectreS" and not with "spectre". How could i make my design work for "spectre"? I am new to cadence.

Thanks in advance,
Kamesh

Title: Re: Different netlist produced from spectre &
Post by kamesh419 on May 23^rd, 2005, 10:15am

I have just checked out the documentaion for X-FAB. It has a link to "X-FAB supported Design Programs". Here is the link to the screenshot.

http://www.aisl.cyd.liu.se/temp/screen.jpg

Unfortunately "spectre" is no where to be found there. But i could find "spectreS".

So i guess i have to work with spectreS. Any suggestions.

Title: Re: Different netlist produced from spectre &
Post by Andrew Beckett on May 25^th, 2005, 10:16pm

This question was resolved on comp.cad.cadence:

http://groups.google.co.uk/group/comp.cad.cadence/browse_thread/thread/9afce526035a39db/6cd6855c2433b718?hl=en#6cd6855c2433b718

Thought I'd reference this for completeness.

Regards,

Andrew.