[ibis-macro] Re: Suggestion for a new macro library element
- From: "Muranyi, Arpad" <arpad.muranyi@xxxxxxxxx>
- To: <ibis-macro@xxxxxxxxxxxxx>
- Date: Thu, 2 Feb 2006 09:04:30 -0800
Hello everyone,
Paul's question raises another thought in my mind.
We talked about adding scaling coefficients to the
IBIS buffer building blocks in the macro model library
a long time ago. In the heat of discussing bugs with
with the vendors and trying find solutions for them
I completely forgot about them in my coding.
Paul question reminded me to this discussion and as far
as I remember we said way back when that we should
implement static scaling coefficients for the I-V
curves to be able to scale the buffer strength, and
perhaps another static coefficient to scale the time
axis of the V-t curves to be able to scale the edge
rate of the buffer.
This would be relatively easy to implement, but before
I did anything I would like to confirm once more whether
I should do it. Please comment.
I would also like to encourage everyone to respond to
Paul's question. An element like that can be added
easily. The question in my mind is whether it is viewed
as a practical addition, and whether substitution for
SPICE-only vendors is an issue or not. (I believe they
could use a subcircuit to contain the 8 sources).
Thanks,
Arpad
==========================================================
-----Original Message-----
From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx]
On Behalf Of Paul Fernando
Sent: Wednesday, February 01, 2006 3:31 PM
To: ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] Suggestion for a new macro library element
Right now scaling is done by instancing 8 current sources in each template, for
each
buffer that is scaled. For example, when modeling a 4-tap pre-emphasis bufer,
3*8
current sources must be instanced.
I suggest we lump them (the 8 current sources) into a macro library element.
Looking forward to your feedback.
Regards,
Paul
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