RE: [SI-LIST] : via effect

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From: Michael Nudelman ([email protected])
Date: Fri Jun 01 2001 - 11:15:26 PDT


Can be anything. Depends on your stackup. Matter'o'fact, it may be none, if
capacitance compensates inductance.

Think of an example:

When you run a speed trace, ended by a via, you are worrying about
capacitive responce (capacitance to surrounding planes) of the via.
But when the same via is the one connecting a de-coupling cap to a plane -
you are worrying about the extra inductance between the cap's pads and the
planes.

Gotta see, what your situation is. Via size, planes' clearances, planes'
configuraton (plane layers vs traces' layers)

Mike.

-----Original Message-----
From: v r [mailto:[email protected]]
Sent: Friday, June 01, 2001 1:42 PM
To: [email protected]
Subject: [SI-LIST] : via effect

Hi SIgurus,
i have a question .is the presense of a via along a trace inductive or
capacitive?
regards
vr

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