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Patent Searching and Data


Title:
STACKED LC COMPOSITE NOISE FILTER
Document Type and Number:
Japanese Patent JPH11136066
Kind Code:
A
Abstract:

To secure the sharp damping characteristic of a noise filter by placing four inductors in series between two input/output terminals in the filter and then placing the capacitors in parallel between three contact parts of those inductors and a ground terminal respectively.

Plural sheet patterns are laminated together and burnt in a single body for production of a stacked LC composite noise filter. The conductive films are formed on the entire surface of every longitudinal end face and its continuous four circumference surfaces of a rectangular parallelepiped. At the same time, the input/output terminals 4 and 4' are formed together with the ground terminals 5 and 5' formed at almost the center between both terminals 4 and 4'. The inductors 11 to L4 are placed in series between both terminals 4 and 4', and the capacitors C1 to C3 are placed in parallel to each other and in three components toward the terminals 5 and 5' from three intermediate contact parts set among the serial inductors L1 to L4. Thus, a triple T type equivalent circuit is constructed in a single element. Then a resonance frequency area is freely set by an interaction of both LC components, and the noise filter can be designed in response to the electromagnetic wave interference noise frequency.


Inventors:
KANDA OSAMU
Application Number:
JP29905697A
Publication Date:
May 21, 1999
Filing Date:
October 30, 1997
Export Citation:
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Assignee:
SUMITOMO METAL IND
International Classes:
H01F27/00; H01G4/40; H03H7/075; (IPC1-7): H03H7/075; H01F27/00; H01G4/40
Attorney, Agent or Firm:
Tono Kono