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Loaded Parallel Stub Common-Mode Filter
November 19, 2008 |Estimated reading time: Less than a minute
EMI radiation problems are usually due to certain unwanted common-mode signals. This paper presents a novel structure, applicable to PCBs or backplanes, that can be used to filter selected frequencies of the common mode present on high-speed differential signals, therefore preventing these signals from reaching effective radiators and reducing the chance for EMI problems. This paper was authored by Predrag Acimovic, a technical advisor in PMC-Sierra's Mixed-Signal Design Group, and presented at DesignCon 2008. Click here to read.