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Title:
RADIATION NOISE SUPPRESSING DEVICE
Document Type and Number:
Japanese Patent JPH11238990
Kind Code:
A
Abstract:

To provide a radiation noise suppressing device capable of fully suppressing radiation noise from an electric cable which is connected to a digital type electronic equipment.

An electrical cable 2 is covered with a cylindrical magnetic substance 3, capable of realizing a magnetic shield function with respect to an electric cable 2, a cylindrical conductive body 4 having a static shield function is arranged at the outer side of the magnetic substance 3, only one end portion 4a close to an electronic equipment PC of the cylindrical conductor 4 is connected to the ground of the electronic equipment PC, the other end 4b is not connected to the ground in configuration, and the radiation noise of the electric cable 2 is adequately suppressed through absorbing of the radiation noise by the cylindrical conductive body 4, which otherwise cannotr be fully absorbed by the cylindrical conductive body 4 alone. Also, by the use of a cylindrical case functioning as a conductive body and realizing static shield function, a long-side case is installed and an arrangement of an electrical conductor can be realized.


Inventors:
UCHIDA KATSUYUKI
SUGITANI MASAMI
SAKAMOTO YUKIO
Application Number:
JP5621898A
Publication Date:
August 31, 1999
Filing Date:
February 19, 1998
Export Citation:
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Assignee:
MURATA MANUFACTURING CO
International Classes:
H05K9/00; G06F1/18; H01B7/00; H02G15/18; H03H1/00; H03H7/01; (IPC1-7): H05K9/00; H01B7/00; H02G15/18
Domestic Patent References:
JPH04326824A1992-11-16
JPH06132692A1994-05-13
JPH07240593A1995-09-12
JPH07297588A1995-11-10
JPH062788U1994-01-14
JPH0758482A1995-03-03
JPH0482814U1992-07-20
JPH05145271A1993-06-11
JPH1093289A1998-04-10
JPH0410595A1992-01-14
JPS5171903U1976-06-07
Attorney, Agent or Firm:
Nishizawa Hitoshi