[ibis-macro] Important question, please reply!

  • From: "Muranyi, Arpad" <arpad.muranyi@xxxxxxxxx>
  • To: <ibis-macro@xxxxxxxxxxxxx>
  • Date: Tue, 1 Nov 2005 13:29:32 -0800

All,

I would like to get everyone's input on this question,
because we could not decide in today's meeting which
way the library should implement the PWL sources.  The
difficulty in making a decision is due the conflict of
various aspirations:  tool compatibility (everyone seems
to be doing something different, even multiple tools of
the same company are some times different), maximum
flexibility, and consistency.


1)  What should the PWL sources do when the input is
outside the range of the table definition?  The options
I can think of are:
 
a) Repeat the first or last points, which amounts to a
   horizontal extrapolation (HE), or
b) use the first and last slopes and extrapolate with that,
   which I call slope extrapolation (SE), or
c) use HE for PWL-s in which the independent axis is time,
   and use SE for PWL-s in which the independent axis is 
   voltage or current
d) add a parameter to the model and let the user choose.



2)  The second question is regarding the event triggered
PWL sources.  Does anyone else besides Cadence's have such 
PWL sources?  If so, could you please describe it to me so
I could choose an implementation that matches most tools.


You response would be very important.  If you feel
uncomfortable to reply publicly, please send an email 
to me directly.  I know we have at lest 10 companies
on this list, so I would like to get at least 10
responses.  (I hope I am not going to get 11 or more
different answers, though :-)
 
Thanks,
 
Arpad
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