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Physical Verification, Extraction and Analysis
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Loading dspf file into schematic? (Read 119 times)
Haydar
New Member
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Posts: 8
Portland, OR
Loading dspf file into schematic?
Feb 09
th
, 2009, 5:26pm
Hi,
Suppose I created independently a dspf file with mosfet AD,PD,AS,PS values. How can I load this dspf file into my schematic in Cadence?
Thanks,
-Haydar
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bernd
Senior Member
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Posts: 229
Munich/Germany
Re: Loading dspf file into schematic?
Reply #1 -
Feb 10
th
, 2009, 1:03am
I think there is no official way of importing dspf as a schematic
in Cadence, one may have written some custom SKILL to do this.
But may I ask you what's the purpose of doing this?
* bernd
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Just another lonesome cad guy
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imd1
Junior Member
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Posts: 27
Re: Loading dspf file into schematic?
Reply #2 -
Feb 10
th
, 2009, 1:29am
Spicevision from Concept Engineering Gmbh should be able to do this. At least the demo I saw appeared to do that with dspf information.
Look at
http://www.concept.de/sv_index.html
I was looking at migrating schematics between tools (virtuoso to/from others) at the time, and we did not purchase it.
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Haydar
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Posts: 8
Portland, OR
Re: Loading dspf file into schematic?
Reply #3 -
Feb 10
th
, 2009, 9:00am
The reason I asked this is because I have a separate tool which estimates pre-layout device parasitics. And I'd like to get this information into the Cadence flow prior to the Spectre simulation.
Thanks,
-Haydar
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bernd
Senior Member
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Posts: 229
Munich/Germany
Re: Loading dspf file into schematic?
Reply #4 -
Feb 11
th
, 2009, 2:55am
Usually you use DSPF in a digital flow, with a static trimming analysis tool. In analog it's typically SPICE like file format with included
parasitics.
Especially if you want to simulate your parasitcs with Spectre you should look if your RC extraction tool may be able to create a so
called 'extracted view' in the Cadence DFII environment, this view then
can be easily plugged in for simulation.
If not SPICE is also a solution, but I guess you will struggle with
DSPF.
* bernd
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Just another lonesome cad guy
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Andrew Beckett
Senior Fellow
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Life, don't talk to
me about Life...
Posts: 1742
Bracknell, UK
Re: Loading dspf file into schematic?
Reply #5 -
Feb 12
th
, 2009, 1:25pm
Note that Ultrasim supports DSPF stitching - where you can "annotate" the DSPF parasitics onto the transistors in your schematic hierarchy prior to simulating it. There are menus on the ADE forms for Ultrasim which allow you to do this.
Spectre does not currently support DSPF (or SPEF) stitching.
Regards,
Andrew.
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