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Hello all. First, I need to let you know that this is my first layout that contains more than 2 transistors, so excuse my noobish methods. I am trying to make a 2-input xor gate. I have run DRC with no errors. I run LVS and get a couple of errors, I cannot seem to fix them, so any help will be much appreciated. I will provide screenshots for the layout and the schematic. I will also include the layout output file. In the mean time I will keep trying to fix it, if I am not able to, I think I will redo it. Thanks.
OUTPUT of LVS:
@(#)$CDS: LVS.exe version 5.1.0 06/08/2010 13:00 (cds125839) $Command line: /ecelib/eceware/cadence04/ic5141USR6143/tools.sun4v/dfII/bin/32bit/LVS.exe -dir /users/ugrad2/2012/spring/bmasri/eecs170D/LVS -l -s -t /users/ugrad2/2012/spring/bmasri/eecs170D/LVS/layout /users/ugrad2/2012/spring/bmasri/eecs170D/LVS/schematicLike matching is enabled.Net swapping is enabled.Using terminal names as correspondence points.Compiling Diva LVS rules... Net-list summary for /users/ugrad2/2012/spring/bmasri/eecs170D/LVS/layout/netlist count 14 nets 5 terminals 6 pmos 6 nmos Net-list summary for /users/ugrad2/2012/spring/bmasri/eecs170D/LVS/schematic/netlist count 6 nets 5 terminals 2 pmos 2 nmos Terminal correspondence points N3 N1 gnd! N0 N0 vdd!Devices in the rules but not in the netlist: cap nfet pfet nmos4 pmos4 Ill-defined correspondence points. N0 N0 Accepted because one is a subset of the other N3 N1 Purged because neither is a subset of the other N0 N0 Accepted because one is a subset of the other N3 N1 Purged because neither is a subset of the other Device summary for layout bad total pmos 6 6 nmos 6 6 Device summary for schematic bad total pmos 2 2 nmos 2 22 net-list ambiguities were resolved by random selection.The net-lists failed to match. layout schematic instances un-matched 12 4 rewired 0 0 size errors 0 0 pruned 0 0 active 12 4 total 12 4 nets un-matched 12 4 merged 0 0 pruned 0 0 active 14 6 total 14 6 terminals un-matched 4 4 matched but different type 0 0 total 5 5Probe files from /users/ugrad2/2012/spring/bmasri/eecs170D/LVS/schematicdevbad.out:I /P0? Device does not cross-match.I /P1? Device does not cross-match.I /N1? Device does not cross-match.I /N0? Device does not cross-match.netbad.out:N /norIn0? Net does not cross-match. It has 2 connections.N /norIn1? Net does not cross-match. It has 2 connections.N /norOut? Net does not cross-match. It has 2 connections.N /gnd!? Net does not cross-match. It has 3 connections.mergenet.out:termbad.out:T -1 gnd! /gnd!? Terminal gnd! in the schematic failed to match any terminal in the layout.T -1 norIn0 /norIn0? Terminal norIn0 in the schematic is not present in the layout.T -1 norIn1 /norIn1? Terminal norIn1 in the schematic is not present in the layout.T -1 norOut /norOut? Terminal norOut in the schematic is not present in the layout.prunenet.out:prunedev.out:audit.out:Probe files from /users/ugrad2/2012/spring/bmasri/eecs170D/LVS/layoutdevbad.out:The no. of lines exceeded than specified by the variable lvsLimitLinesInOutFile.To see the complete information please see the file:/users/ugrad2/2012/spring/bmasri/eecs170D/LVS/layout/devbad.outnetbad.out:The no. of lines exceeded than specified by the variable lvsLimitLinesInOutFile.To see the complete information please see the file:/users/ugrad2/2012/spring/bmasri/eecs170D/LVS/layout/netbad.outmergenet.out:termbad.out:T -1 gnd! /gnd!? Terminal gnd! in the layout failed to match any terminal in the schematic.T -1 xorIn0 /xorIn0? Terminal xorIn0 in the layout is not present in the schematic.T -1 xorIn1 /xorIn1? Terminal xorIn1 in the layout is not present in the schematic.T -1 xorOut /xorOut? Terminal xorOut in the layout is not present in the schematic.prunenet.out:prunedev.out:audit.out:
The first thing I noticed is that the body connections do not match between schematic and layout.
You may need to change the schematic.
In reply to TonySal:
Thank you, I have fixed the error you found, along with many others and have got it to work. I am now having a problem with a simple nor gate layout, would it be possible to help me with that?