Patent ID: 7078988
Filing Date: 2006-07-18
Classification: H01F,H03H

Abstract:
1. A common-mode filter comprising: a magnetic or non-magnetic drum type core including a core portion, and a pair of flange portions disposed on opposite sides of said core portion so as to be integrated with said core portion; electrodes provided on said pair of flange portions of said drum type core; and at least two wires wound on said core portion of said drum type core and having ends connected to said electrodes respectively, wherein each of said flange portions of said drum type core has a groove between corresponding two of said electrodes, and a separation protrusion for separating said groove into two; said wires are wound on said core portion of said drum type core in such a distributed winding manner that an inter-wire distance between said wires is provided so that no part of any wound wire, including any insulating portion of a wound wire, contacts any other part of any other wound wire, and a winding pitch between adjacent turns of each of said wires is also provided; and said wires are one-by-one led out through said grooves while separated by said separation protrusions so that said ends of said wires are connected to respective ones of said electrodes, wherein the separation protrusion has a width greater than the inter-wire distance.