Re: [SI-LIST] : broadside differntial pairs

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From: Mike Ventham (ventham@quantic-emc.com)
Date: Tue Jul 25 2000 - 10:51:34 PDT


Sean,

I ran it through our field solver and to get 100 Zo differential, it needed
a dielectric 41 mils thick and the conductors were 10 mils away from the
ground plane. I assumed stripline configuration.

How does this compare with your actual board measurements?

If you want anything else, let me know.

Sean Murray wrote:
>
> Looking for what would give me 100 ohms Zod on the following
>
> Trace width .008 (both signal layers)
> Dk=3.9
> Copper weight=1 oz.
> Coupling = as close to 10% as possible.
>
> I have tried Polar and it seems to give me numbers that don't correlate to
> what I actually used on my board.
>
> Regards,
> Sean Murray
> General Manager
>
> M&M Specialties Inc.
> 1236 W. Southern Ave. #106
> Tempe, AZ. 85282-4518
> Phone: (480) 858-0393 x105
> Cell: (602) 684-7859
> Fax: (480) 858-1882
> Email: seandm@mmspec.com
> WWW.mmspec.com
>
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-- 
Regards

Mike ________________________________________________________________ | Mike Ventham - Vice-President Engineering, | | Quantic EMC Inc Headquarters | | Croft House, Chilcompton, 191 Lombard Ave, Winnipeg, | | Somerset, UK, BA3 4JA Manitoba, Canada R3B 0X1 | | Tel: 44 (0)1761 232191 Tel: (204) 942 4000 | | Fax: 44 (0)1761 233549 Fax: (204) 957 1158 | | Email: ventham@quantic-emc.com http://www.quantic-emc.com |

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