Re: [ng-spice-devel] Linux Numerical Problems
On Thu, Jul 27, 2000 at 05:47:22PM +0200, Paolo Nenzi wrote:
> On Thu, 27 Jul 2000, Manfred Metzger wrote:
>
> > I don't think so, because I have a spice3f5 on my Linux box at home,
> > which gives, at least on some examples I have tried, correct results,
> > where ngspice fails.
>
> I am pleased to hear that. This means that our basement is solid. Good!
I have tried filt_rc.cir on ng-spice-0.0. That gives the following
results.
============================================================
Note: can't find init file.
Circuit: RC filter
Error on line 2 : v1 1 0 0 ac 1.0
Device type Vsource not supported by this binary
Warning: singular matrix: check nodes 1 and 1
Note: starting Gmin stepping
Note: One successful Gmin step
Note: One successful Gmin step
Note: One successful Gmin step
Note: One successful Gmin step
Note: One successful Gmin step
Note: One successful Gmin step
Note: One successful Gmin step
Note: One successful Gmin step
Note: One successful Gmin step
Note: One successful Gmin step
Note: One successful Gmin step
Note: One successful Gmin step
Note: Gmin stepping completed
Circuit: RC filter
Date: Thu Jul 27 22:41:32 2000
RC filter
Pole-Zero Analysis Thu Jul 27 22:41:32 2000
---------------------------------------------------
Index all
---------------------------------------------------
0 -1.000000e+08, 0.000000e+00
==============================================================
Note that the error comes from my desire to cut compilation time. I
have not included the full range of devices in this executable. This,
however, should not impact the pole-zero analysis in any way.
When time permits, I'll do a binary search on the release tarballs to
find the version that introduced the bug in the first place.
Happy hacking,
--
Arno
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