RE: [SI-LIST] : Ferrite Beads

About this list Date view Thread view Subject view Author view

From: Bill Owsley (owsley@cisco.com)
Date: Thu Nov 16 2000 - 13:22:13 PST


Folks, Dilpreet has tossed out a well baited hook - who will bite ??
ps. 'tis not a simple hook, tho' the bait looks that way.

At 10:33 AM 11/16/2000 -0800, Dilpreet Saini wrote:
>Thanks Allen. I have a fairly good idea about ground bounce. What I was
>not sure about was "why having a ferrite in series with GND would cause
>ground bounce"
>
>regards,
>Dilpreet
>
>
>
>-----Original Message-----
>From: Allen Fernandez [mailto:Allen_Fernandez@Jabil.com]
>Sent: Thursday, November 16, 2000 10:28 AM
>To: Dilpreet Saini; 'marcgodbout@auranetinc.com'
>Cc: si-list@silab.eng.sun.com
>Subject: RE: [SI-LIST] : Ferrite Beads
>
>
>Dilpreet,
>
>Doug Brooks has some excellent articles about ground bounce in his
>"Brookspeak Articles". Goto :
>
>http://www.ultracad.com/articles.htm
>
>and look for "Ground Bounce, Parts 1 and 2".
>
>Also, if you have "High-Speed Digital Design : A Handbook of Black Magic",
>by Dr.Johnson and Dr.Graham, there's an excellent explanation of ground
>bounce starting on page 67 (section 2.4.1.1).
>
>--Allen
>
>-----Original Message-----
>From: Dilpreet Saini [mailto:DSAINI@altera.com]
>Sent: Thursday, November 16, 2000 12:26 PM
>To: 'marcgodbout@auranetinc.com'
>Cc: si-list@silab.eng.sun.com
>Subject: RE: [SI-LIST] : Ferrite Beads
>
>
>Hi Marc,
> Can you please comment a little bit more on Why would a ferrite in
>series with GND cause the ground bounce.
>
>regards,
>Dilpreet
>
>-----Original Message-----
>From: marcgodbout@auranetinc.com [mailto:marcgodbout@auranetinc.com]
>Sent: Thursday, November 16, 2000 4:41 AM
>To: Dilpreet Saini; si-list@silab.eng.sun.com
>Subject: RE: [SI-LIST] : Ferrite Beads
>
>
> From experience, a ferrite in series with GND will cause a ground bounce on
>the board. If you're using DC coupled signals to other circuits in the
>system, these signals will see their reference point change.
>
>-Marc Godbout
>
> > -----Original Message-----
> > From: Dilpreet Saini [mailto:DSAINI@altera.com]
> > Sent: Wednesday, November 15, 2000 4:45 PM
> > To: SI List (E-mail)
> > Subject: [SI-LIST] : Ferrite Beads
> >
> >
> > Hi all,
> > In the past I have used ferrite beads for transient and
> > parasitic suppression of the supply (VCC) coming into the
> > board. So far I have never used ferrite beads in series with
> > the GND trace/plane. I was wondering do any of you have any
> > experience using ferrite beads in that scenario.
> > Thanks in advance for your help.
> >
> > regards,
> > Dilpreet
>
>
>**** To unsubscribe from si-list or si-list-digest: send e-mail to
>majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
>si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
>si-list archives are accessible at http://www.qsl.net/wb6tpu
>****
>
>
>**** To unsubscribe from si-list or si-list-digest: send e-mail to
>majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
>si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
>si-list archives are accessible at http://www.qsl.net/wb6tpu
>****

----------------------------
Bill Owsley, owsley@cisco.com
919) 392-8341

Compliance Engineer
Cisco Systems
7025 Kit Creek Road
POB 14987
RTP. NC. 27709

**** To unsubscribe from si-list or si-list-digest: send e-mail to
majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
****


About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Tue May 08 2001 - 14:30:09 PDT