1) Serpentine traces are longer than straight traces. 2) Ground is designed by providing the desired return path, and avoiding unwanted return paths. Parallel ground planes guarantee the worst of both worlds. Steve. At 05:07 PM 5/11/2004 +0530, suresh wrote: >Hello SI Expert Team :: > > >Pls clarify the following signal integrity issues. > > >1) We design WLAN cards with PCI as the host interface.Threre is a 33 Mhz >clock which comes from the CPU to the pci edge connector of our card as a >part of pci standard.I have seen on quite a few ethernet cards( NIC cards) >in which this 33 mhz clock signal from CPU comes to the ethernet cards >edge connector is taken to the internal ciruitry through a curved path >(with some 5 to 6 curves) and not as a straight line.Pls clarify as how >this helps the signal integrity. > >2)For ADC (Analog to Digital Converter) we do use separate analog and >digital ground planes.The basic ground comes to our ADC(second) card from >other Digita FPGA l(First) card.Pls specify the ground comming from the >first FPGA card to the ADC card should be taken as the analog ground plane >or the digital ground plane. > >Best Regards >-- >suresh > >------------------------------------------------------------------ >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