RE: Multiple voltage levels and s2ibis2

Rob,

Just connect your internal power node to a voltage source in your netlist.
The voltage that needs to be varied for case modeling is that of the output
stage (3.3V). In the s2ibis control file you can set Vih to 1.8V for the
level of the input pulse.

Regards,
Weston Beal
Signal Integrity Engineer
Compaq Computer Corp.

                -----Original Message-----
                From: Robert Goodrich (ra3862)
[mailto:ra3862@email.sps.mot.com]
                Sent: Wednesday, 02 June, 1999 1:04 PM
                To: ibis-users@eda.org
                Subject: Multiple voltage levels and s2ibis2

                All:

                To my knowledge s2ibis2 cannot be used directly to model a
                buffer that is powered internally at one potential, but will

                drive externally at another. For instance, I am required to

                model I/O that internally is 1.8V, but drives a 3.3V
                output. I was wondering, first of all, if there were any
                plans in the works for an "updated" s2ibis program (ver
                3.2?). Next, I was wondering if anyone had developed any
                scripts or programs on their own that would help model a
                buffer of this type. If so, would you be open to sharing
                them?

                --Rob

                --

                Rob Goodrich
                Circuit Design - Advanced Imaging Technology (AIT)
                Motorola SPS, I&E Solutions
                6501 William Cannon Drive West MD: OE37
                Austin, TX 78735
                ra3862@email.sps.mot.com
                (512) 895-7341

                
Received on Wed Jun 2 15:15:22 1999