RE: Vcc power planes

Grasso, Charles ([email protected])
Fri, 20 Jun 1997 14:49:44 -0600

If the tree structure adds inductance (I'm not sure I understand what a
structure is...) in series with the capacitor - then NO NO do NOT listen
to him!!
Charles Grasso
EMC Engineer

>From: Bradley L. Mendenhall[SMTP:[email protected]]
>Sent: Friday, June 20, 1997 1:37 PM
>To: [email protected]
>Cc: [email protected]
>Subject: Vcc power planes
>Can anyone give me advice about using my power plane as a reference for
>high speed PC board traces? I have a colleague who claims this results
>in a noisy board and that you are better off connecting Vcc to chips using
>a tree type structure with bypass caps next to each Vcc pin. Every source
>I have read advocates using power planes as a reference plane or return
>path except for VERY high speed designs. Should I listen to him?
>Brad Mendenhall [email protected]
>BroadBand Technologies, Inc. Phone: (919)405-4682
>4024 Stirrup Creek Drive FAX: (919)544-5356
>Research Triangle Park, NC 27709-3737