RE: Simulation resolution weirdness

I am using Interconnectix. Do the tools not generally work in the same way?

Regards,
Mark

> -----Original Message-----
> From: EXT Ingraham, Andrew [mailto:Andrew.Ingraham@compaq.com]
> Sent: 19 September 2000 13:13
> To: 'mark.browne@nokia.com'
> Cc: 'ibis-users'
> Subject: RE: Simulation resolution weirdness
>
>
> There are limitations and imperfections in all circuit
> simulators. (You
> didn't mention which simulator program you are using, which might help
> others to help you.) Some programs are better than others.
> These problems
> can be finicky and difficult to avoid.
>
> Yours sounds like a "numerical oscillation" problem, which
> occasionally
> happens in SPICE or SPICE-like simulators. In your case, it
> apparently
> happens to be made worse by certain time resolution settings.
> There are
> likely some controls (such as the Method=Gear vs. Trap
> setting in SPICE)
> that may help here.
>
> Regards,
> Andy
>
>
> > ----------
> > From: mark.browne@nokia.com[SMTP:mark.browne@nokia.com]
> > Sent: Tue, 19 September 2000, 05:25
> > To: ibis-users@eda.org
> > Subject: Simulation resolution weirdness
> >
> > Hi all,
> >
> > I am fairly new to using IBIS, so I am hoping that the
> symptoms that I am
> > getting will strike a chord with someone out there.
> >
> > I have run the same simulation several times, changing only the time
> > resolution each time. When the resolution is set to 20ps,
> the results
> > look
> > fine. However, at 15ps the resultant waveform is just an increasing
> > oscillation, and at 10ps it look like a range of mountains.
> >
> > Obviously I am misusing the method somehow - all I need is
> for someone to
> > tell me how.
> >
> > Any ideas?
> >
> > Mark Browne
> > Senior Engineer
> > Nokia UK Ltd.
> >
>
 
Received on Tue Sep 19 06:53:43 2000