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Other CAD Tools >> Physical Verification, Extraction and Analysis >> Post-layout simulation
https://designers-guide.org/forum/YaBB.pl?num=1250845516

Message started by tideblue on Aug 21^st, 2009, 2:05am

Title: Post-layout simulation
Post by tideblue on Aug 21^st, 2009, 2:05am

Hello,
I have finished the Calibre PEX and successfully extracted the netlist.
But I do not know how to use the new netlist to run the post layout simulation
I tried to google it but seems there is no up-to-data guide on Cadence 6.1
Anybody could give me a guide?
Thanks!

Title: Re: Post-layout simulation
Post by Andrew Beckett on Aug 21^st, 2009, 3:21am

There should be the ability to output a "Calibre Extracted View" from Calibre PEX. This will create a netlistable view alongside your schematic and layout in the database, and then you can use the hierarchy editor to pick the Calibre Extracted View instead of your schematic - you then simulate the configured testbench.

This is much simpler than trying to include an extracted netlist, and having to get the pin orders to match up, and so on.

Regards,

Andrew.

Title: Re: Post-layout simulation
Post by tideblue on Aug 21^st, 2009, 7:11am

Thanks for your reply.
After I generate the calibre view and I tried to insert it in simulation
there is a error message as:
"Cannot initiate calibre view"

Title: Re: Post-layout simulation
Post by ywguo on Aug 24^th, 2009, 10:10pm

Hi tideblue,

Quote:

After I generate the calibre view and I tried to insert it in simulation

What do you mean by "insert it in simulation"?

I don't know the reason why you have such an error message. Did you setup a config view using hierarchy editor?

BG
Yawei

Title: Re: Post-layout simulation
Post by tideblue on Aug 25^th, 2009, 12:55am

What I did by now is
1 in the Calibre setting I selectedCalibre-->outputs-->SVDB-->Generate Calibre connectivity interface data, start RVE after PEX, Generate cross reference data for RVE, then after Calibre I can generate a Calibre view with the default setting. In the mean time three files are also generated" *.pex.netlist, *.pxi, *.pex.netlist.pex
2 in the top level simulation setup, I created a new "config" .And I set the one which is layouted to the "instance view-->calibre"
3 Then I choose "OPEN" in the hierarchy editor and start simulation.
What I see now is that the post simulation result is exactly the same as previous simulation
I doubt my layout is that good

Title: Re: Post-layout simulation
Post by Andrew Beckett on Aug 25^th, 2009, 9:27am

Sounds reasonable. Probably best to contact Cadence (or maybe Mentor, since essentially it's their extracted view) customer support to walk through the process and check your data. It's hard to tell what is wrong without being able to see it...

Regards,

Andrew.

Title: Re: Post-layout simulation
Post by ywguo on Sep 10^th, 2009, 12:23am

Quote:

1 in the Calibre setting I selectedCalibre-->outputs-->SVDB-->Generate Calibre connectivity interface data, start RVE after PEX, Generate cross reference data for RVE, then after Calibre I can generate a Calibre view with the default setting. In the mean time three files are also generated" *.pex.netlist, *.pxi, *.pex.netlist.pex

tideblue,

Try to choose Outputs --> CALIBREVIEW in the Netlist panel.

Yawei

Title: Re: Post-layout simulation
Post by nomanhai on Dec 30^th, 2009, 6:44pm

Hi tideblue,
would you able to solve the problem that extracted and schematic simulations match exactly. I am having the same pproblem. Please help me out.
Thanks,