[SI-LIST] Re: METASTABILITY

  • From: "Muranyi, Arpad" <arpad.muranyi@xxxxxxxxx>
  • To: <si-list@xxxxxxxxxxxxx>
  • Date: Thu, 5 Jan 2006 10:21:29 -0800

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
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