IP Library › Granted Patent US 12,340,934
Granted Patent B2
US 12,340,934 · App. 18/121,819 · Granted Jun 24, 2025

Common mode filter

Inventors: Toshio Tomonari (Tokyo, JP); Tsutomu Kobayashi (Tokyo, JP); Kazunori Arimitsu (Tokyo, JP); Yuma Komaya (Tokyo, JP)
Assignee: TDK CORPORATION
H01F27/2823H01F17/045H01F27/29H01F2017/0093
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Quick Facts
Patent No.
US 12,340,934
App. No.
18/121,819
Granted
Jun 24, 2025
Kind
B2
Abstract

A device includes a core having a first end and a second end, and first and second wires wound around the core, where the core has first, second, and third sections, the second section being arranged between the first and third sections. Each of the first and second wires includes an i th turn located on the first section, a j th turn located on the second section, and a k th turn located on the third section. The i th turn of the first wire is closer to the first end than the i th turn of the second wire, the j th turn of the first wire is closer to the second end than the j th turn of the second wire, and the k th turn of the first wire is closer to the first end than the k th turn of the second wire.

Claims (22)

1. A device, comprising:

a core having a first end and a second end; and

first and second wires wound around the core,

wherein the core has first, second, and third section, the second section being arranged between the first and third sections,

wherein each of the first and second wires includes an i th turn located on the first section, a j th turn located on the second section, and a k th turn located on the third section,

wherein the i th turn of the first wire is closer to the first end than the i th turn of the second wire,

wherein the j th turn of the first wire is closer to the second end than the j th turn of the second wire, and

wherein the k th turn of the first wire is closer to the first end than the k th turn of the second wire.

2. The device as claimed in claim 1 ,

wherein the first and second wires cross each other between the first and second sections.

3. The device as claimed in claim 2 ,

wherein the first and second wires cross each other between the second and third sections.

4. The device as claimed in claim 3 ,

wherein a number of turns of each of the first and second wires on the second section is a same as a number of turns of each of the first and second wires on the third section.

5. The device as claimed in claim 3 ,

wherein the core further has a fourth section, the third section being arranged between the second and fourth sections,

wherein each of the first and second wires further includes an m th turn located on the fourth section, and

wherein the m th turn of the first wire is closer to the second end than the m th turn of the second wire.

6. The device as claimed in claim 5 ,

wherein the first and second wires cross each other between the third and fourth sections.

7. The device as claimed in claim 6 ,

wherein a number of turns of each of the first and second wires on the first section is a same as a number of turns of each of the first and second wires on the fourth section.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 15, 2023
From: TOMONARI, TOSHIO; KOBAYASHI, TSUTOMU; ARIMITSU, KAZUNORI; KOMAYA, YUMA
To: TDK CORPORATION
Reel/Frame 062990/0571 →
Priority Claims (3)
JP 2012-277199 · Dec 19, 2012 · national
JP 2013-053642 · Mar 15, 2013 · national
JP 2013-206385 · Oct 1, 2013 · national
Continuity (4)
Division 16782251 · Feb 5, 2020
Continuation 15487784 · Apr 14, 2017
Continuation 14132550 · Dec 18, 2013
Related Publication 20230223180A1 · Jul 13, 2023
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