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Re: gEDA-user: one schmatic ==> two netlist
Thank's for the quick answer.
I need the Spice netlist not only for simulation, I need it also for LVS
(Layout Versus Schmatic).
I can create a Spice netlist from the IC Layout (even from the digital part).
The usual way is to compare this with a netlist, created from the schmatic
editor.
I know, this sounds very complicated when you know the CAD flow for PCB
design. I personaly moved one year ago from PCB to ASIC design and was
shocked about this uncomfortable methode.
Never the less, if we find a solution to this problem with the device
property, I can use gschem for my development.
Gruesse in die neue Welt
Peter
On Friday 31 October 2003 22:54, Stuart Brorson wrote:
> This is an interesting conumdrum. The SPICE netlister needs the DEVICE
> attribute in order to know what type of SPICE card to spit out. I don't
> know why the Verilog DEVICE property is the instance name since I didn't
> write the Verilog netlister. OTOH, I don't know what property you would
> use instead. Changing this would require a total re-evaluation of the gEDA
> attribute architecture (which maybe it needs, but is a big, big effort).
>
> The bigger question is: Why are you using the same schematic for analog
> and digital simulation? Most board designers (also in the professional
> world) use separate schematics for this kind of thing. THat is, if you
> have a mixed signal circuit, you create a separate analog schematic with no
> digital stuff on it for SPICE simulation. You keep a main schematic for
> netlisting and layout.
>
> Ooops, I just realized that you are doing a chip. Mentor Graphics is
> currently hyping a design environment which allows you to do seamless
> integration of SPICE, Verilog, and Verilog-AMS (or something like that).
> Cadence and Synopsys must have products like that too, although I don't
> follow them as much. Therefore, this type of thing is more cutting-edge
> than gEDA. If you're spinning mixed signal chips, maybe you need to buy a
> professional CAD package . . . .
>
> My thoughts/opinions only.
>
> mit freundlichen Gruessen aus Amerika,
>
> Stuart
>
> Quoting Familie Kaiser <Die.Kaisers@t-online.de>:
> > Hi,
> >
> > does anybody had the problem to create two different netlists from one
> > schmatic and run into problems with the device property?
> >
> >
> > Concrete problem:
> > I am designing a mixed signal ASIC. Digital simulation is done with
> > Verilog,
> > analog simulation and LVS with Spice.
> >
> > The device property with Verilog is the package instance and with Spice
> > the
> > device property tells the netlister what spice primitve to use.
> >
> >
> > Has anybody a solution to this problem?
> >
> >
> > Peter
> >
> >
> >
> > --
> >
> > ----------------------------------------
> > die.kaisers@t-online.de
> > oder
> > dh0may@darc.de
> > oder
> > http://www.darc.de/c/12
> > ---------------------------------------
--
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die.kaisers@t-online.de
oder
dh0may@darc.de
oder
http://www.darc.de/c/12
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