[eispice] Re: Gnucap vs. Ngspice vs. Eispice

Hi Newell,

I think it depends on what you want to simulate but if ngspice can do the job I 
recommend using it. Spice is kind of like the assembly language of simulators 
and even though gnucap has spice support it's not identical (at least it wasn't 
the last time I looked at it). I tried to make eispice spice-like but it's 
still 
quite different due to the Python front-end. Most commercial simulation tools 
(like HyperLynx, SigXplorer, ICX, Eldo, HSPICE, PSPICE, etc...) support models 
based on spice syntax. If you learn spice well you'll have a tool that may be 
valuable for the rest of your career. Once you have an understanding of the 
spice3f5 basics 
(http://www.thedigitalmachine.net/reference/Spice_3f3_Users_Manual.pdf) then 
you 
may get more out of the fancier open source tools, like spice addon xspice or 
different simulators like gnucap, eispice, or Qucs. Each do specific things 
better than the others.

The main reason I started writing eispice is because I wanted a spice simulator 
with IBIS model and W-Element support and felt that starting from scratch would 
be easier than trying to shoe-horn them into one of the existing open source 
simulators. As time progressed I've added more features than I had originally 
intended but eispice doesn't do everything that ngspice and gnucap can. For 
instance it doesn't have many semi-conductor models, and it only supports 
operating-point and transient simulations, plus a bunch of other stuff is 
missing.

Hope that's helpful,
Cheers,
Charles

Newell Jensen wrote:
> Charles,
> How do you think eispice compares to gnucap and ngspice?  I am going to be
> using gEDA for my design automation and these other two simulators are the
> main ones that are used.  The usual design path is "gschem" $B"*(B 
> "gnetlist -g
> spice-sdb" $B"*(B ["ngspice" | "gnucap"].  I like using Python and I know 
> that
> gnucap has a wrapper, however most of my classes are teaching Spice so I
> wanted to use an open source variant.  What's your advice?  Thanks.
> 
> Newell
> 
> 
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