Re: Wanted: LM-709 (Spice model) National Op-Amp

Chuck Harris wrote: 
Oh, be a pal and post the links!

                     -Chuck
Ken Smith wrote:

In article <LdSZe.684$Fi3.327@xxxxxxxxxxxxxxxxxxxxxxxxxx>,
Paul Rako  <sp_a_mpa_u_l@xxxxxxxxx> wrote:

Never heard of such a thing. Please name one or two and I will look them up.
As I keep saying over and over and over I am concenred with board-level
tools, not what is available for ICs.

[....] 


Oh, be a pal and post the links!

                     -Chuck

There are a couple of nice programs that will check your PCB layout program's netlist output against the spice net list to find errors. They use some tricks to relate the net names to each other so that they will find nets that are broken into two sections and nets that are shorted. They are free to download and I was going to give you the link but since you top posted I decided not to. 


Oh, be a pal and post the links!

                     -Chuck

<Since material top posted am cutting out previous>

"Having a separate SPICE schematic

violates this principle. Now you have something whose coherence is only
assured by human inspection."


Why do you assume this? 


Oh, be a pal and post the links!

                     -Chuck


Aren't LVS or "Layout versus Schematics" tools known in your work?

Robert 


Oh, be a pal and post the links!

                     -Chuck

Actually, just do a Google on the words: spice netlist checker
and you will get links to dozens of programs that should do the
trick.

-Chuck 

I have looked at Tanner's tool and others and they all seemed
geared to IC design or comparing two SPICE schematics.
I can see how it would be easy to compare the net-list
outputs of two programs but us board guys have a specific
problem:  After we lay out the board we re-annotate so
that the reference designators ascend from left to right
and top to bottom.  Now there needs to be yet another tool
so that the SPICE schematic can be back annotated.  Naw,
enough trouble in the world-- I prefer to stick with Orcad
or Pads or Electronics Workbench that can do the layout
against one schematic.  I will keep looking at the listings.
I did not know this type of tool existed.

PS: Use Opera web browser and you can plug-in the aspell
spell-checker to spell check any text box in the browser.
Works great in Google Groups.

Got a hold of Jim Williams and he will get the article out
tonight from his files.  He said there were several circuits.
This should be fun.

Paul
.