RE: [SI-LIST] : 200 ohms

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From: Sean Murray (seandm@mmspec.com)
Date: Fri Dec 01 2000 - 10:28:09 PST


Actually, have to do it internally, and using stripline it's about
impossible when you only have .236 to work with.

-----Original Message-----
From: Ray Anderson [mailto:Raymond.Anderson@Eng.Sun.COM]
Sent: Friday, December 01, 2000 11:22 AM
To: seandm@mmspec.com; si-list@silab.eng.Sun.COM
Subject: Re: [SI-LIST] : 200 ohms

Not sure what you are trying to do, but if you go microstrip,
a 4 mil wide trace on a 250 mil thick FR4 substrate will give
you about 200 ohms impedance. (according to apsim RLGC)

-Ray

>
> Anyone able to achieve 200 ohms on .250 thick board before? If not what is
> the closest achievable board impedance within reason?
>
> Sean Murray
> General Manager
>
> M&M Specialties, Inc.
> 1236 W. Southern Ave. #106
> Tempe, AZ 85282
> 1-800-892-8760 x105
>
> www.mmspec.com
>
>


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