steve Yesterday, I have done some experiment. At some frequency, the clock signal which changes reference plane is more ciritical. Best Regards Zhangkun 2004.8.8 ----- Original Message ----- From: "steve weir" <weirsp@xxxxxxxxxx> To: <zhang_kun@xxxxxxxxxx>; "si-list" <si-list@xxxxxxxxxxxxx> Sent: Friday, August 06, 2004 8:07 PM Subject: Re: [SI-LIST] Which noise source is critial? > Zhangkun, I don't think there is a general answer to your question. Sorry. > > Steve. > At 07:20 PM 8/6/2004 +0800, Zhangkun wrote: > >Dear All: > >In PI and EMI, there are a lot of noise source. For instance, the power > >pin which absorb current, the clock signal which change reference plane. > >Between these two kind of noise source, which one is more critical? > > > >Best Regards > > > >Zhangkun > >2004.8.6 > > > > > >------------------------------------------------------------------ > >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 > > > > ------------------------------------------------------------------ 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