[comp.sys.hp] Problem with Spice2G.6

narayan@cssun.tamu.edu (Sriram Narayan) (12/22/89)

I would like to report a few problems I have encountered using Spice2G.6
on our HP9000/300 series machines with HP-UX 6.5. Firstly, I would like
to thank those who responded to my initial post for running this on HP
machines. 

1. The results I got for a "badly designed" CMOS circuit did not agree
   with the results I got with Spice running on a VAX and the results
   obtained from Spice3B.1. The VAX and 3B.1 results agreed. 
   By "badly designed" I mean transistors in or around cutoff when they
   should be in saturation. This is only to show that one should be 
   careful about interpreting results when your circuit is in a 
   marginally biased condition. Has anyone noticed this problem? 

2. We were simulating a circuit with noise analysis and at one point
   the program crashed, after giving a segmentation fault (core dumped)
   error. This was after DC convergence was obtained and part of the
   noise analysis was completed. This same circuit ran on the VAX without
   any problems. Comparison could not be made with the Spice3B.1 simulation
   since it doesn't have a noise analysis or transfer function option.

If anybody desires further details or if they feel my results are due
to improper installation of Spice2G.6 I would like to heare from you. 
Thanks.    
                                                  -Sriram
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Sriram Narayan  810446  Texas A&M University     |
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