[SI-LIST] Re: Power Supply Distribution/Filtering/Decoupling Guide
- From: steve weir <weirsp@xxxxxxxxxx>
- To: martin@xxxxxxxxxxxxxx, <si-list@xxxxxxxxxxxxx>
- Date: Mon, 12 Jan 2004 20:41:49 -0800
Martin,
And that is just what a lot of people end-up doing. Unfortunately that
insurance isn't free, and one can argue that it isn't very cheap
either. Many hundreds if not thousands of decoupling capacitors cost real
money in: raw parts, placement, drill costs, yield failures, and available
real-estate.
Steve.
At 08:29 PM 1/12/2004 -0800, Martin Euredjian wrote:
>Chris Cheng wrote:
>
> > there is
> > never a need for fancy decoupling scheme on PCB for properly design
> > processor and package.
>
>How, then, does one go about evaluating the problems (if there's one at
>all)? As a consumer of chips --without access to internals-- it seems to me
>that the only choice you have is the empirical: build, test, measure,
>correct, repeat. Board spins are expensive, particularly in the low-volume
>world. It might be much easier to pepper the board with a bunch of
>inexpensive "insurance" capacitors.
>
>
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>Martin Euredjian
>eCinema Systems, Inc.
>voice: 661-305-9320
>fax: 661-775-4876
>martin@xxxxxxxxxxxxxx
>ecinema@xxxxxxxx
>www.ecinemasys.com
>
>
>
>
>
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