Hi Arpad, METASTABILITY can be occured when it comes to pcb. We cannt consider its only problem of circuit designer, SI engineer should also consider the metastability. On 1/5/06, Muranyi, Arpad <arpad.muranyi@xxxxxxxxx> wrote: > > Thanks for the numerous replies, public and private. > I agree that there is a strong relationship between > signals and metastability in general. I guess the > reason I said that I didn't see the relationship in my > first reply to this thread was because I was thinking > of signal integrity as the art of making sure that the > signal is clean, has the correct amplitude and slew > rate, that it is timed correctly, along with dealing > with transmission line effects, terminations, cross > talk, etc... to avoid any possibilities for metastability. > In that sense an SI engineer is working on signal > quality problems, not so much on the metastability > problem itself. The tricks an SI engineer uses to > solve these problems and the tricks a circuit designer > uses to reduce the metastability problem are quite a > different world to me. > > This is why asking an explanation for what the "concept > of *METASTABILITY*" is in an SI forum seemed inappropriate > to me. Most SI experts are not circuit designers, > therefore may not be knowledgeable enough to answer this > question in depth. > > Arpad > ----------------------------------------------------------- > > > -----Original Message----- > From: Peterson, James F (FL51) [mailto:james.f.peterson@xxxxxxxxxxxxx]=20 > Sent: Thursday, January 05, 2006 9:16 AM > To: Muranyi, Arpad; si-list@xxxxxxxxxxxxx > Subject: RE: [SI-LIST] Re: METASTABILITY > > a good question, but I believe they are indeed related : a lot of signal > integrity problems are timing problems (if we had enough time, they = > wouldn't > be signal integrity problems), some of those timing problems are = > problems > because they cause a signal to slide inside the setup/hold timing = > boundaries > of a flop, and this is where Metastability happens...=20 > > best regards, > Jim Peterson > Honeywell > > -----Original Message----- > From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] = > On > Behalf Of Muranyi, Arpad > Sent: Thursday, January 05, 2006 11:37 AM > To: si-list@xxxxxxxxxxxxx > Subject: [SI-LIST] Re: METASTABILITY > > Maybe I am missing the point, but I don't see that metastability and SI = > are > related subjects... > > Arpad > -----------------------------------------=3D20 > > -----Original Message----- > From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] = > =3D > On Behalf Of Somesh Dhavala > Sent: Thursday, January 05, 2006 6:54 AM > To: si-list@xxxxxxxxxxxxx > Subject: [SI-LIST] METASTABILITY > > Hi All, > I am very new to the SI. > I am unable to understand the concept of *METASTABILITY*, I am very =3D = > thank > ful to you if you explain me in detail. > Please suggest me some documents. > > Thanks & Regards > Somesh Dhavala > CG-CoreEl > ------------------------------------------------------------------ > 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 > > > -- Somesh Dhavala CG-CoreEl ------------------------------------------------------------------ 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