And then we need to define "stitched", how far away from the signal via is the stitching via. And then "necessary", what are the signals / design requirements. On 10/15/2014 8:09 PM, Aaditya K wrote: > > By "proper" my intention now is, even if there is a > reference plane change in signal path and both the > reference planes are stitched. > > On Oct 15, 2014 8:04 PM, "Ivor Bowden" > <bowden.ivor@xxxxxxxxx <mailto:bowden.ivor@xxxxxxxxx>> wrote: > > Right, for example if stackup is sig - gnd - sig then why > bother? > Need to know how Aaditya defines "proper" before further > comment. > -Ivor > > On 10/15/2014 12:32 PM, Lee wrote: > > You are correct. Can't think of any case where they > add value commensurate > > with their cost. > > > > Lee > > > > -----Original Message----- > > From: Aaditya K > > Sent: Wednesday, October 15, 2014 10:41 AM > > To: si-list > > Subject: [SI-LIST] Ground vias around signal via > > > > Hello Experts, > > I have a question on ground vias placement around > signal via. > > > > My opinion is, if we have a proper return path, > they are not necessary. Am > > I correct? > > > > Any situations they are useful other than shielding? > > > > How will they help? When do we need them? > > > > Please help. > > > > Thanks > > Aaditya > > > > > > > ------------------------------------------------------------------ > > To unsubscribe from si-list: > > si-list-request@xxxxxxxxxxxxx > <mailto: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 > <mailto:si-list-request@xxxxxxxxxxxxx> with 'help' in > the Subject field > > > > > > List forum is accessible at: > > http://tech.groups.yahoo.com/group/si-list > > > > 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 > > > > > > > > > > ----- > > No virus found in this message. > > Checked by AVG - www.avg.com <http://www.avg.com> > > Version: 2014.0.4765 / Virus Database: 4040/8394 - > Release Date: 10/15/14 > > > > > ------------------------------------------------------------------ > > To unsubscribe from si-list: > > si-list-request@xxxxxxxxxxxxx > <mailto: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 > <mailto:si-list-request@xxxxxxxxxxxxx> with 'help' in > the Subject field > > > > > > List forum is accessible at: > > http://tech.groups.yahoo.com/group/si-list > > > > 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 > > > > > > . > > > > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx > <mailto: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 > <mailto:si-list-request@xxxxxxxxxxxxx> with 'help' in > the Subject field > > > List forum is accessible at: > http://tech.groups.yahoo.com/group/si-list > > 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 > > ------------------------------------------------------------------ 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 forum is accessible at: http://tech.groups.yahoo.com/group/si-list 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