Hi folks, I have done in one PCB. It is 12 layer board I have used 4 digital signal processor and one field programmable gate array for this pcb . Dsp side I have used 3 pwr supplies 1v 1.5v 2.5v before I have populated that dsp I have checked between the all pwr supply and gnd resistance is very high resistance but after I have populated that 3 dsp I have checked between the 1Vpwr supply and gnd resistance is only 3 ohms my 1v pwr section is 20A design I can't understand this type of problem Can u give any solution for this problem I have appreciate it Thanks V.jagaveer ------------------------------------------------------------------ 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 FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org 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