Re: [SI-LIST] : differential impedance

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From: Mike Jenkins (jenkins@lsil.com)
Date: Thu Apr 20 2000 - 11:29:41 PDT


Sean,

Based on experience with Fibre Channel PCB layouts, 150 ohm dif'l
striplines will require some pretty thick dielectrics and some
pretty thin lines. I believe it's doable, but will dictate some
trade-offs on the cross section.

Good luck,
Mike

>
> We currently have an application that requires some signals to
> be 150 ohms (stripline if possible?); with them being routed as
> differential pairs so that their impedance is 75 ohms. Anyone have any
> experience with this as stripline. We have done them as microstrip
> before and at 100/50 stripline, but never 150/75.
>
> Regards,
> Sean Murray
> Sales 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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