Reply-To: "Fred Bartoli"
From: "Fred Bartoli"
References: <email@example.com> <firstname.lastname@example.org>
Subject: Re: what is monte caro analysis ?
Date: Wed, 25 Dec 2002 18:52:00 +0100
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"Kevin Aylward" a écrit dans le message news:
> John Woodgate wrote:
> > I read in sci.electronics.design that Kevin Aylward
> > wrote (in
> > ) about 'what is
> > monte caro analysis ?', on Tue, 24 Dec 2002:
> >> I think so. This is called Worst Case (re-runs). Indeed, SuperSpice
> >> does this with a very simple GUI setup
> >> (http://www.anasoft.co.uk/screenshot.html:-)
> >> I personally, don't use MC at all. I think it has limited use because
> >> you have to do a lot of runs to get reasonable results, and it might
> >> not even use the max min values at all. I also think it can give one
> >> the wrong mindset, e.g. too much trail and error.
> > OTOH, worst case is very pessimistic, except for circuits with very
> > low parts count.
> I agree, that it can be pesemistic, but thats usually a good thing. Only
> if you really having trouble in meeting spec, is it worth trying to fine
> tune the sim a bit.
> 100 Monte Carlo runs give a good guide to the
> > sensitivity of the circuit performance against component values.
> But so does a WC, and in a lotv fewer runs.
> > the values used for each run are logged, it's possible to see which
> > parts are responsible for any suspiciously larger excursion of
> > performance.
> But this is still not usually practical for transient runs on anything
> but small circuits.
Depends on the package. The one I use allow *whatever* postprocessing you
want from each simulation case result in order to build the input datastream
for the final montecarlo display. A bit memory consumming but really useful
> Kevin Aylward
> SuperSpice, a very affordable Mixed-Mode
> Windows Simulator with Schematic Capture,
> Waveform Display, FFT's and Filter Design.