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 --------------------------------------------------------------------- IBIS Macro website: http://www.sisoft.com/ibis-macro IBIS Macro archives: //www.freelists.org/archives/ibis-macro To unsubscribe send an email: To: ibis-macro-request@xxxxxxxxxxxxx Subject: unsubscribe --------------------------------------------------------------------- IBIS Macro website: http://www.sisoft.com/ibis-macro IBIS Macro archives: //www.freelists.org/archives/ibis-macro To unsubscribe send an email: To: ibis-macro-request@xxxxxxxxxxxxx Subject: unsubscribe