US 11,817,844 B2
Common mode filter
Yugo Asai, Tokyo (JP); Tsutomu Kobayashi, Tokyo (JP); Daisuke Urabe, Tokyo (JP); Hiroshi Suzuki, Tokyo (JP); Emi Ito, Yamagata (JP); and Toshio Tomonari, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK Corporation, Tokyo (JP)
Filed on Dec. 26, 2022, as Appl. No. 18/088,674.
Application 18/088,674 is a continuation of application No. 16/236,562, filed on Dec. 30, 2018, granted, now 11,563,415.
Claims priority of application No. 2018-000751 (JP), filed on Jan. 5, 2018; and application No. 2018-234484 (JP), filed on Dec. 14, 2018.
Prior Publication US 2023/0136361 A1, May 4, 2023
Int. Cl. H03H 7/42 (2006.01); H01F 27/28 (2006.01); H01F 17/00 (2006.01); H03H 7/09 (2006.01); H03H 1/00 (2006.01); H01F 27/06 (2006.01); H01F 17/04 (2006.01); H01F 27/00 (2006.01)
CPC H03H 7/427 (2013.01) [H01F 17/04 (2013.01); H01F 17/045 (2013.01); H01F 27/006 (2013.01); H01F 27/06 (2013.01); H01F 27/2823 (2013.01); H03H 1/00 (2013.01); H03H 7/09 (2013.01); H01F 2017/0093 (2013.01); H03H 2001/0035 (2013.01); H03H 2001/0092 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A common mode filter comprising:
a winding core part; and
first and second wires wound in a same direction around the winding core part,
wherein the first and second wires constitute a first winding block on one endmost side in an axial direction of the winding core part, a second winding block on another endmost side in the axial direction of the winding core part, and a third winding block positioned between the first and second winding blocks,
wherein the first and second wires cross each other in a first area located between the first and third winding blocks and in a second area located between the second and third winding blocks, and
wherein the first and second wires do not cross each other between the first and second areas, and
wherein a number of turns in the third winding block is larger than each of numbers of turns in the first and second winding blocks.