There are many good books about SI-Interconnects, you can browse the SI-List archive for Book recommendations and you will find many. Resonances occur whenever there are discontinuities in the Signal path or it's return path. Just simulate an impedance matched transmission line up to very high frequencies, and you will see a nice linear transmission S-Parameter. Now change the impedance of the source and the Sink and there is your resonator. Depending on the length of the trace, there will be at least one suckout in the transmission S-Parameter. BR Gert ---------------------------------------- Absender ist HARTING Electronics GmbH, Marienwerderstraße 3, D-32339 Espelkamp; Registergericht: Amtsgericht Bad Oeynhausen; Register-Nr.: HRB 8808; Vertretungsberechtigte Geschäftsführer: Dipl.-Kfm. Edgar-Peter Düning, Dipl.-Ing. Torsten Ratzmann, Dipl.-Wirtschaftsing. Ralf Martin Klein -----Ursprüngliche Nachricht----- Von: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] Im Auftrag von Mallikarjun K Gesendet: Dienstag, 22. April 2014 13:35 An: bala89si@xxxxxxxxx Cc: Istvan Novak; si-list@xxxxxxxxxxxxx Betreff: [SI-LIST] Re: Resonance below the fundamental frequency Hi, I am not sure i can ask this question here or not? Can anybody give more details about Interconnect resonance. whether it is about the microstrip or stripline transmission line resonaces. How resonance will occur in these transmission lines. Any documents/material will be also helpful for reference. On Mon, Apr 21, 2014 at 5:52 PM, Balaji G <bala89si@xxxxxxxxx> wrote: > Thanks Istvan :) Clear explanation :) > > On Mon, Apr 21, 2014 at 5:42 PM, Istvan Novak > <istvan.novak@xxxxxxxxxxx > >wrote: > > > Hi Balaji, > > > > As always, it depends :-) . > > > > The resonance will not cause any problem IF the signal is truly > > periodical with 667MHz fundamental frequency, like a clock signal, > > (or the data stream is properly band limited, see below) and IF > > there is no potential aggressor signal in the spectrum of the > > resonance. For data-like signals, coding may limit the low end of > > the spectrum to be above the resonance frequency, however, there are > > still a few important scenarios to consider: out-of-band > > communications, training sequences and negotiating sequences > > temporarily may occupy the spectrum around the resonance, > > potentially causing failures; moreover uncorrelated aggressor > > signals may have spectral content around the resonance and the > > resulting noise may stress the common-mode range of the connected > > devices. > > > > Regards, > > > > Istvan Novak > > Oracle > > > > > > > > > > On 4/21/2014 7:34 AM, Balaji G wrote: > > > >> Hi all, > >> A square wave will have sinusoidal wave at the odd multiples of > >> fundamental frequency. Say if a square wave having frequency of > >> 667MHz with the maximum significant sine wave at a frequency of > >> 2GHz (Rise time - bandwidth relationship) transmitted over an > >> interconnect which has resonance at 400MHz, will it affect the > >> signal quality? > >> > >> In simpler words, If the resonance occurs at the frequency below > >> the fundamental frequency, does the signal quality gets affected? > >> > >> Regards, > >> Balaji > >> > >> > >> > >> > > > > > ------------------------------------------------------------------ > 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 > > > ------------------------------------------------------------------ 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 ------------------------------------------------------------------ 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