hi, Pras the voltage you need to study is between Vcc@die side and gnd@die side since waveform there is what I/O or core really see in its power and ground pin. The way you connect ideal power supply is correct. But how to connect spice ground to package is a case by case questions, which will be decided by what kind of model you used for package. Thanks and regards Tao ( Helen ) On 7/11/07, Pras venki <venki.pras@xxxxxxxxx> wrote: > > Hello everyone, > I m trying to simulate crosstalk, SSN on my package model. > Now when I m connecting the spice's ideal power supply to my package, I > connect it between the ball end of the supply net and the ground net. Also > then I short the ball end of the ground net to ground. Is this setup > right? > Coz ppl when they talk abt power/gnd nets, they talk of them in pairs but > here I m having two separate voltage waveforms - one at Vcc and then the > other at 0V, which is how I look at it. > > Regards, > > > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > > or to administer your membership from a web page, go to: > //www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > > List technical documents are available at: > http://www.si-list.net > > List archives are viewable at: > //www.freelists.org/archives/si-list > or at our remote archives: > http://groups.yahoo.com/group/si-list/messages > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > > ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu