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- Xref: sparky comp.cad.cadence:505 comp.lsi:704 comp.lsi.cad:1157
- Path: sparky!uunet!cs.utexas.edu!torn!newsserver.cs.uwindsor.ca!arindam
- From: arindam@cs.uwindsor.ca (Arindam Das)
- Newsgroups: comp.cad.cadence,comp.lsi,comp.lsi.cad
- Subject: prune
- Keywords: PDExtract, 1.2 um cmos4s, layout, nmos-array
- Message-ID: <2072@newsserver.cs.uwindsor.ca>
- Date: 20 Nov 1992 03:55:21 GMT
- Sender: news@server.uwindsor.ca
- Followup-To: poster
- Lines: 52
-
-
- Ref: article on Gate-array simulation problem
- hi netters,
-
- a week back I had posted an article regarding the problem
- of hspice simulation of an extracted layout of an nmos-array.
- The problem was: what to do with the unused nmos transistors
- in the array that was creating the simulation problem.
-
- A pointer was shown to me by Keith Sabine at keiths@Cadence.COM.
-
- The pointer was: "use the pdv prune command in PDextract rules
- file."
-
- In PDV manul of Edge it is said that "prune" has to be used
- in PDcompare rules file. Now I might create a schematic rep
- for the corresponding layout if the circuit is containing
- 12 or 13 nmos transistors and then try PDCompare but
- I DON'T WANT to draw schematics of the circuit that contains
- hundred nmos transistors (say in a 10 by 10 nmos transistors array)!
-
- However, I tried Keith's pointer as follows and ended up with
- following errors. I must have made some mistake which I can't figure
- out:
-
-
-
- The rules file I have got is pdvrules4 (for Cmos4s) supplied
- by CMC. It has switches like do_drc, do_extract, do_autogen, etc.
-
- 1. I wildly used the "prune" command at the end of do_extract switch and
- the message was as it should be:
-
- undefined layer: prune
-
- 2. Next I tried to use pdCompare for the extracted rep of the layout.
- Please note that i did not have the schematic rep. So I just wildly
- tried to compare the same extracted layout and the message was:
-
- netlist not distinct
-
-
- COULD someone tell me a work-around so that I can use the "prune"
- command effectively ?
-
- thanx
-
- -arindam
- --
- Arindam Das email: arindam@CS.Uwindsor.Ca
- dept. of comp. sci. ph# 253-4232Ext 3003/3007
- U. of Windsor, Ont, Canada
-