[SI-LIST] Re: eye diagram
- From: "San Miguel, Shane" <shane.san.miguel@xxxxxxxxx>
- To: <kbagga31@xxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Mon, 29 Sep 2003 08:40:31 -0700
An eye diagram shows you how sloppy you can be :) =20
The "eye" is the boundary that a signal may vary in amplitude and time =
with reference to another signal while maintaining a passing test =
condition. If a signal is supposed to be aligned with clock, it has a =
spec that says it can vary +- some given time amount (can be thought of =
as something like jitter) around this reference and still be valid. The =
voltage level that this signal rides at (usually Vtt or Vref) can also =
vary a +- amount around it's level. If you combine the +- voltage =
variance and the +- time variance you end up with something the shape of =
an eye. In the broadest generalization, the more "eye" you have, the =
more margin-to-fail you have.
The example I give is using spec values but in practice, you vary the =
voltage and timing to push the device until failure thus defining the =
eye.
Shane San Miguel=20
Senior Product Engineer=20
Platform Memory Operations=20
Intel Corporation=20
=20
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of karan bagga
Sent: Monday, September 29, 2003 1:37 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] eye diagram
Hi,
=20
Want to know about eye diagram.
How does eye diagram plays a role in desiging Multi Gigaherts PCBs ?
What is the methodology i.e do eye diagrams come in datasheets.
Need some basic understanding on relation with eye diagram and SI.
=20
Regards
Karan
---------------------------------
Do you Yahoo!?
The New Yahoo! Shopping - with improved product search
------------------------------------------------------------------
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 archives are viewable at: =20
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages=20
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
=20
------------------------------------------------------------------
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 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
Other related posts:
