[SI-LIST] Re: Different Spice netlists
- From: "Clewell, Craig" <cclewell@xxxxxxxxxxxxxx>
- To: "'erno.lahteenmaki@xxxxxxxxx'" <erno.lahteenmaki@xxxxxxxxx>
- Date: Fri, 31 Jan 2003 16:32:09 -0500
Br,
I once had the pleasure of working with a very intelligent PhD. who gave me
these great words of wisdom - "Simplify the problem until it goes away and
then work backwards from your assumptions". Well, let's work backwards from
the original question...
5. No, there is no difference between Spice netlists
4. Yes, there is subtle differences. As you can see Arpad, Fred, Andrew and
myself all agree. We all mention that the SOME of the "syntax" is different
from one flavor to another.
3. A few of the differences in syntax have to do with sources, lossy
elements and node names.
2. R, L, C, V, and other common/generic elements will work in just about
every flavor there is.
1. As you migrate away from the simplest of circuits and common components
you risk the ability to transfer a netlist from one package to another. If
you purchase software from a SPICE vendor chances are they added something
to the code to make it more functional for a specific purpose. They dress
up the original code with more bells, whistles and capability than what the
bear bones code allows you to do. I believe all SPICE packages will allow
you to write code for a resistor like this R1 0 1 50, but not all packages
will allow you to write it like this R1 node1 node2 R=3D'V(node100, node101)
* I(another_element_name)...'. That is what we all mean by "syntax"
differences.
So, to answer the original question NO there is no difference as long as
your circuit has the most common simple elements. YES, there is a
difference if you start using application specific components, subcircuits
and code.
Craig
-----Original Message-----
From: Clewell, Craig [mailto:cclewell@xxxxxxxxxxxxxx]
Sent: Friday, January 31, 2003 8:47 AM
To: 'erno.lahteenmaki@xxxxxxxxx'; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Different Spice netlists
Br,
NO, there is no difference for generic components. However, there are
subtle differences between HSPICE and a generic Berkley SPICE. HSPICE has
some proprietary level models for some silicon that other flavors do not.
They also included the W element which is something that other brands of
SPICE do not have. When you think of SPICE in general you should not only
be thinking about your circuit connections, but also that of a programmer as
well. SPICE is a "computer" program that describes your circuit behavior.
Synopsis (HSPICE) has extended the language to include some of their own
syntax. Other SPICE vendors have done this as well.
If you buy a book on SPICE most of the "generic language" will be described.
Once you conquer the generic components the differences from one flavor to
another will become apparent.
Craig
-----Original Message-----
From: erno.lahteenmaki@xxxxxxxxx [mailto:erno.lahteenmaki@xxxxxxxxx]
Sent: Wednesday, January 29, 2003 1:55 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Different Spice netlists
Hello
Is there any differencies between Spice netlists,
for example Eldo, HSpice and Berkeley Spice netlists?
I mean that part where the actual component or circuit is
described. Are they similar or not? If someone has links to
page where different spice models are compared, I'd like to hear about =
them.
Br, Erno
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