[SI-LIST] Re: Power Supply Distribution/Filtering/Decoupling Guide
- From: "Martin Euredjian" <martin@xxxxxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Mon, 12 Jan 2004 17:08:23 -0800
So... I just got one of the new Intel D875PBZ motherboards (3.6GHz, 800MHz
FSB, etc.). In looking at it, one of the things that caught my eye
immediatlely was wasn't there. I was expecting lots of decoupling
capacitors, particularly surrounding certain chips. To my surprise, the
design has absolutely no components on the bottom and an (appartent) handful
of decouplers on the top layer.
With all the talk and controversy on this forum, application notes, papers
and books describing gargantuan capacitor trees as a requirement for good
signal integrity, reduce RFI, etc. it's always been a surprise to run across
product after product that does not seem to fit the proposed model very
well. Am I missing something fundamental here?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Martin Euredjian
eCinema Systems, Inc.
voice: 661-305-9320
fax: 661-775-4876
martin@xxxxxxxxxxxxxx
ecinema@xxxxxxxx
www.ecinemasys.com
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