[SI-LIST] Total impedance of trace, plated holes and connectors
- From: "Fitzgerald, Kevin" <kevin.fitzgerald@xxxxxxxxxxxx>
- To: "'si-list@xxxxxxxxxxxxx'" <si-list@xxxxxxxxxxxxx>
- Date: Fri, 14 Feb 2003 14:32:36 -0500
Hi,
I am doing a design which requires 55 Ohms impedance. This number includes
the effect of plated holes and connectors. How should I go about
determining the line impedance to route with, such that the total affect
will be 55Ohms with holes and connectors?
The design is backplane 10-15 slots 0.8 pitch with holes about 0.050 in
diamter, which will be filled with 0.2 inch pins
Is there a rule of thumb for the impedance drop, or an estimation scheme
Kevin Fitzgerald
Jr Hardware Engineer
General Dynamics Canada
(613) 596-7776
kevin.fitzgerald@xxxxxxxxxxxx
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