Circuit for Suppressing Common-Mode Energy on Unshielded Twisted-Pair Media
Original Publication Date: 1993-Apr-01
Included in the Prior Art Database: 2005-Mar-19
The disclosed circuit provides the means by which the common mode energy incident on a 4-wire communications link may be suppressed in order to meet the Electro-Magnetic (EM) emission requirements specified by various licensing agencies. The topology, a 2-wire coupled inductor for each wire pair followed by a 4-wire coupled inductor for both wire pairs, is superior in performance to a filter fabricated from only 2-wire devices or 4-wire devices.