[SI-LIST] Re: Return path
- From: "Budathoki, Trilok (GE Consumer & Industrial)" <trilok.budathoki@xxxxxx>
- To: <si-list@xxxxxxxxxxxxx>, <gguida@xxxxxxxxxx>
- Date: Mon, 19 Jul 2004 16:58:03 +0530
Giancarlo,I searched for Proximity effect & found similar question =
answered
by Dr. Howard Johnson.=20
The link is http://www.sigcon.com/Pubs%5Cnews%5C4_1.htm Hope it's useful =
for=20
everyone.
Thanx to everyone for participating in discussion.
-----Original Message-----
From: giancarlo guida [mailto:gguida@xxxxxxxxxx]
Sent: Monday, July 19, 2004 4:17 PM
To: Budathoki, Trilok (GE Consumer & Industrial)
Subject: Re: [SI-LIST] Return path
As general rule
the return path current, in high frequency, will follow the path with
minimum inductance
Taking in to account the so-called proximity effect
( the return current will try to stay close to direct path)
you can easily understand where the current should be.
In practice you also must consider that the planes could not be so clean
and resonance between plane could allow signal to be coupled
out of your control
Hope this help
Giancarlo
----- Original Message -----
From: "Budathoki, Trilok (GE Consumer & Industrial)"
<trilok.budathoki@xxxxxx>
To: <si-list@xxxxxxxxxxxxx>
Sent: Monday, July 19, 2004 12:40 PM
Subject: [SI-LIST] Return path
Hi
I have a question.If we have stacking sequence given below.Return path =
can
be VCC plane (provided it's not broken) or Gnd plane.
TOP
GND1
LAYER3
LAYER4
VCC
LAYER6
GND2
BOT
If Layer 3 takes GND1 as return path, What will be return path for Layer =
4 &
Layer 6. Why?
Can anyone explain the theory / mechanism.
Thanks
Trilok Budathoki
GE - India Business Center,
*: 91-40-27881731
* : trilok.budathoki@xxxxxx
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