[SI-LIST] Re: Bypassing on Passive Backplane
- From: "Lee Ritchey" <leeritchey@xxxxxxxxxxxxx>
- To: "Joel Brown" <joel@xxxxxxxxxx>, si-list@xxxxxxxxxxxxx
- Date: Wed, 9 Sep 2009 14:53:44 -0700
Joel,
There is a wealth of information on how to design your power distribution
system you can obtain to guide you. Istvan Novak has published a book
which is a collection of papers on the subject. Larry Smith has published
a number of very good papers on the topic in the IEEE proceedings.
Among these are many of the answers you seek. I don't think any of us is
willing to offer a generic answer to your questions as to quote Eric
Bogatin "it depends". on what your circuits are doing.
Lee Ritchey
> [Original Message]
> From: Joel Brown <joel@xxxxxxxxxx>
> To: <si-list@xxxxxxxxxxxxx>
> Date: 9/9/2009 2:16:44 PM
> Subject: [SI-LIST] Bypassing on Passive Backplane
>
> Looking for advice, published guidelines, books, etc on PDN for passive
> backplane.
> In the past I was told to always bypass both sides of power connectors
with
> bulk and high frequency capacitors to prevent AC currents flowing through
> the connector.
>
> If the plug in cards have sufficient bypassing then why would it be needed
> on the backplane?
>
> Should power planes be bypassed to ground planes on some grid interval?
>
> If high speed signals are always surrounded by ground planes, are the
power
> planes free of signal return currents?
>
>
>
> Thanks - Joel
>
>
>
>
>
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