Hello all, In designing PDN (chip-pkg-board), many people do frequency domain analysis to determine the impedance of the PDN. What is it for? As far as power integrity is concerned, isn't it better and enough to run transient simulation to see the PWR/GND bounce seen from the chip e.g. I/O ? Many thanks, Jenni ------------------------------------------------------------------ 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 Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu