Re: Multisim & PSPICE - using MOSFETs

"ER Yost" <yoster84@xxxxxxxxxxx> schrieb im Newsbeitrag news:1151518712.913111.294080@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Helmut Sennewald wrote:

have you ever heard of LTspice. It's practically free, unlimited
and highly compatible to PSPICE on the netlist level. Your MOSFETs
will work with LTspice if they work with PSPICE.

Actually, yes, I downloaded LTspice yesterday and it has been very
helpful. I've been able to build bigger circuits and get good feedback.

However...

With the research that I am doing this summer, it will be extremely
important to be as accurate as possible. You can Google "quantum-dot
cellular automata" (QCA) if you'd like - I'm doing research for Notre
Dame (1st hit). The circuit that I am building isn't really to help the
QCA project itself, but to provide a concrete example of how QCA is
going to be more energy efficient than typical circuits today.

People should be aware that the GUIs of real instruments are mostly
compromises because of limitations in the measurement hardware,
limitations of the display, knobs and the cursor control.
Why want you go with the second choice? I wonder.

It's much more efficient and powerful to work with pure xy-diagrams
in the waveform viewer of PSPICE(Probe), LTspice and many other SPICEs.

I need something more accurate than LTSpice.

Hello ERY,

LTspice has normally "data compression" enabled. It's like a lossy
data compression of the raw-file. You should switch it off.

..options plotwinsize=0

With this command, LTspice will beat PSPICE and others regarding
accuracy by decades!
Sorry that this compression setting isn't so obvious for new users.

Best regards,
Helmut


Sure, PSPICE or Multisim
aren't perfect, but they're pretty close. I'd love it if I could get a
good enough version of PSPICE to have more than 10 transistors, because
I have more experience with that. But, for now, I'd love to be able to
use Multisim since it will give me enough computing power to do it.

Nothing against LTSpice. It's definitely saved me time. It just won't
be up to par in the end.

Thanks,

ERY



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