[SI-LIST] AW: Loose coupling vs tight at the same time
- From: "Havermann, Gert" <Gert.Havermann@xxxxxxxxxxx>
- To: "mfilion@xxxxxxxxxxxxxxx" <mfilion@xxxxxxxxxxxxxxx>, "SI-LIST mailing list" <si-list@xxxxxxxxxxxxx>
- Date: Tue, 5 Feb 2013 09:05:52 +0000
Marc-André,
Even with good design, you will have some discontinuity in either the common or
the differential mode. This alone isn't critical if transitions are well
designed, but it might create a resonance if more than one transition back and
forth happens along the line. Especially if there are equal electrical lengths
in between the transitions.
You can check for resonance frequencies with a simple circuit simulation with
trace or W-elements.
BR
Gert
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-----Ursprüngliche Nachricht-----
Von: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] Im
Auftrag von Marc-André Filion
Gesendet: Freitag, 1. Februar 2013 23:36
An: SI-LIST mailing list
Betreff: [SI-LIST] Loose coupling vs tight at the same time
Hi,
We're having a discussion here and I would like to know your thought about it.
How bad is it to transition from tight coupling diff signal to loose coupling
signal and vice-versa. We have a case here where we pass-thru a pin field and
we reduce the coupling from loose to tight for 2"and get back to loose after.
I'm not sure that it's a good approach. What's your idea on this?
Marc-André Filion
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