EMI

[n11444@seznam.cz]

Diky, nasel jsem toho pana Zahlavu a vypada to ze to je presne co jsem
potreboval.
Pro dalsi zajemce je to zde:
http://www.micro.feld.cvut.cz/home/zahlava/mps/predn/skripta/skr_mps.pdf

ZN

----- Original Message -----
From: <Naprstek>; "Jiri" <Jiri.Naprstek@ricardo.com>
To: "HW-news" <hw-list@list.hw.cz>
Sent: Tuesday, April 25, 2006 4:53 PM
Subject: RE: EMI


Docela dobre povidani o tom "jak sobe naroutovati desku" je v Zahlavove
knize o DPS. Nevim jak presne se jmenuje, ale pred casem tu probehl link na
jeji elektronickou verzi (dejte v konferenci hledat Zahlava a nejspis na ni
narazite). Najdete tam par zasad, jak zabranit zbytecnemu vyzarovani z
desky, coz je take 3/4 cesty k tomu, jak zabranit zbytecnemu prijmu do desky
:-) Bohuzel tam AFAIK neni, jak zajistit rozumne EMI/EMS na urovni schematu
(filtry, kondiky, prepetove ochrany...).

BTW: Je nutne, aby to USBcko bezelo 30cm po desce? Pro USB2 si tim zadelate
na dobre problemy uz jenom se spravnou impedanci vedeni. Taky je dobre, aby
signaly z venku, ktere prave prinaseji spousty svinciku (a jsou ochotny
spousty svinciku i vyvest ven), koncily co mozna nejrychleji v nejake
soucastce (i s tim svincikem). Neslo by toho USB svaba nacpat co nejblize ke
konektoru i za cenu delsich internich sbernic?

Jirka Naprstek

> -----Original Message-----
> From: hw-list-bounces@list.hw.cz [mailto:hw-list-bounces@list.hw.cz]On
> Behalf Of n11444@seznam.cz
> Sent: Tuesday, April 25, 2006 4:34 PM
> To: HW-news
> Subject: Re: EMI
>
>
> Nebo, nevite nekde kde by bylo o tomhle problemu neco
> napsano? Jak tahat
> spoje, ceho se vyvarovat a jak docilit co nejmensiho vyzarovani ?
> Staci i EN.
>
> ZN
>
>
> ----- Original Message -----
> From: "Pavel Kadečka" <pavel.kadecka@gmail.com>
> To: "HW-news" <hw-list@list.hw.cz>
> Sent: Tuesday, April 25, 2006 2:47 PM
> Subject: Re: EMI
>
>
> Mozna kdyby Vas dotaz byl konkretnejsi? Co to Vase zarizeni bude
> delat? Nebo Vam jde o vyzarovani toho USB kabelu - resp. jeho cesty na
> plosnem spoji? Myslim, ze USB jako takove ma pro nizke rychlosti
> moznost pracovat s nestinenym kabelem a naopak pro full-speed (nebo
> high speed? - proste max. rychlost myslim 480Mbit/s) USB2.0 primo
> vyzaduje stineny kabel.
>
> P.K.
>
> 2006/4/25, n11444@seznam.cz <n11444@seznam.cz>:
> > Copak se tu nenajde nekdo, kdo rozumi EMI problematice ?
> >
> > ZN
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>
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> No virus found in this incoming message.
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> Version: 7.1.385 / Virus Database: 268.4.6/323 - Release
> Date: 24.4.2006
>
>
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No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.1.385 / Virus Database: 268.4.6/323 - Release Date: 24.4.2006