Patent ID: 7182644

Claim:
An electromagnetic interference (EMI) filter for filtering noise from a Direct Current (DC) power signal transmission line at a location at which the transmission line traverses an enclosure wall of a device comprising a DC power source, the EMI filter comprising: a support structure configured to connect to a power connector of a DC power transmission line, wherein the support structure comprises a first receptacle configured to mate with a ground pin of the power connector and a second receptacle configured to mate with a DC power signal pin of the power connector; and a plurality of high frequency filters wherein when the EMI filter is mounted to the device enclosure wall ( 252 ) the plurality of filters are disposed circumferentially around the second receptacle of the support structure, and wherein the filters electrically couple the DC power signal pin to a low potential sink such that noise within a particular frequency range appearing on the transmission line is carried to the low potential sink through the high frequency filters.