Title:
LAMINATE TYPE NOISE FILTER
Document Type and Number:
Japanese Patent JP2000151327
Kind Code:
A
Abstract:
To obtain a laminate type noise filter which can remove both the normal-mode noise and common-mode noise irrespective of circuit impedance.
A spiral coil 21 composed of coil conductors 6a to 6e and a spiral coil 22 composed of coil conductors 7a to 7e are coupled electromagnetically in an in phase state to function as a common-mode choke coil and to remove common-mode noise. A capacitor 23 constituted of capacitor conductors 8a and 8b remove the normal-mode noise. The axes of the spiral coils 21 and 22 are parallel with respect to the stacking direction of insulating sheets 2 and 3 and the mounting surface of the noise filter.
Inventors:
AZUMA TAKAHIRO
Application Number:
JP32158298A
Publication Date:
May 30, 2000
Filing Date:
November 12, 1998
Export Citation:
Assignee:
MURATA MANUFACTURING CO
International Classes:
H01F27/00; H03H7/075; H03H7/09; (IPC1-7): H03H7/09; H01F27/00; H03H7/075
Domestic Patent References:
JPH0786863A | 1995-03-31 | |||
JPH10190391A | 1998-07-21 | |||
JPS55685A | 1980-01-07 | |||
JPH10200357A | 1998-07-31 | |||
JPH09294041A | 1997-11-11 | |||
JPH044426U | 1992-01-16 |
Attorney, Agent or Firm:
Morishita Takeichi
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