Re: [SI-LIST] : RF & Digital

Shayle Hirschman (shayle@mho.net)
Tue, 10 Aug 1999 21:01:49 +0000

Why a stack-up of 4 signal layers in a row (L4 to L7)?

This seems a bit unusual.

Shayle

At 08:09 AM 8/11/99 +0800, you wrote:
>If I have a design that have digital circuit and a small portion of RF.
>There will be some signals going from digital into the RF and out from
>the RF to the digital portion. If the digital portion has to be
>impedance control at 50ohms, how should I go about doing such design to
>ensure that both RF and Digital requirements are taken care of, without
>causing any interference between these two circuits? What about the
>ground? This design will be a 10-layer with the following stack-up :
>L1 : signal
>L2 : GND
>L3 : +5V
>L4 : signal
>L5 : signal
>L6 : signal
>L7 : signal
>L8 : +2.5V
>L9 : GND
>L10 : signal
>
>I would appreciate any advise from you experts out there.
>Thanks and regards.
>
>
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