Current through any common impedance directly couples into all signals that share that impedance. Steve. On 10/21/2011 7:18 PM, elie issa wrote: > Could you also elaborate on how ground bounce impacts > crosstalk? > > Thank you > Elie > From: steve weir<weirsi@xxxxxxxxxx> > To: si-list@xxxxxxxxxxxxx > Sent: Friday, October 21, 2011 3:39:38 PM > Subject: [SI-LIST] Re: SSN > > SSN will ultimate limit, but only after it has done great damage to > signal integrity. You can demonstrate the idea by getting out an octal > or wider driver and wiring all the inputs to the same pulse source, and > all the outputs to 50 Ohm loads. Measure the waveforms with tight > bypass right at the package, and then inserting your soon to be not so > favorite ferrite bead between the bypass and the package Vdd pin. If > you don't have a favorite bead, one that is called out in many app notes > is a TDK MPZ1608S221A. > > Then you can repeat the experiment by driving one of the inputs with an > out of phase signal. > > Steve. > > On 10/21/2011 9:12 AM, elie issa wrote: >> It looks like my second line got clipped: >> We know that SSN saturates after switching a certain number of outputs, >> based on the relation N*L*di/dt, and >> starts a reverse process,.. >> >> From: elie issa<eliaissa1@xxxxxxxxx> >> To: "si-list@xxxxxxxxxxxxx"<si-list@xxxxxxxxxxxxx> >> Sent: Friday, October 21, 2011 11:50:37 AM >> Subject: SSN >> >> >> I'd like tp propose this topic: >> we know that SSN staurates after switching a certain number of outputs, and >> start >> could someone elaborate on the reasoning behind the saturation, and are >> there >> designed applications taking advantage of this aspect of it out there >> Also, system crosstalk worsen because of package parameters, so beside >> crosstalk at package level, ssn >> also contribute to crosstalk, could some explain what happens there? >> >> Thank you >> Elie >> ------------------------------------------------------------------ >> 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 >> >> >> > -- Steve Weir IPBLOX, LLC 150 N. Center St. #211 Reno, NV 89501 www.ipblox.com (775) 299-4236 Business (866) 675-4630 Toll-free (707) 780-1951 Fax ------------------------------------------------------------------ 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