Title:
SIGNAL FILLING/EXTRACTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2004/112274
Kind Code:
A1
Abstract:
It is possible to easily fill a communication signal in current flowing in a linear conductor and easily extract the communication signal from the current flowing in the linear conductor as well as realize this filling and extraction without being affected by low-frequency large current flowing in the linear conductor. A signal filling/extraction device includes a ferromagnetic core (2) through which a power line (1) passes. The ferromagnetic core (2) has a second winding (3) arranged around it and the winding (3) is connected to an amplifier (4) and an LPF (5). The current of the power line (1) amplifies the current induced from a magnetic flux Φ1 generated by the ferromagnetic core (2) and removes high frequency. The current thus obtained flows into a third winding (6) around the ferromagnetic core (2) and generates a magnetic flux Φ2 of reverse phase canceling the low-frequency current portion of the magnetic field Φ1 of the ferromagnetic core (2). A high frequency signal is extracted through a first winding (7) from the magnetic flux of the remaining high-frequency portion. On the contrary, the current for the signal applied to the first winding (7) is filled in the commercial current of the power line (1).
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Inventors:
KUWABARA MASAHIRO (JP)
HIROTSU KENICHI (JP)
SHIMOGUCHI TAKEFUMI (JP)
ASAO YOSHIHISA (JP)
HIROTSU KENICHI (JP)
SHIMOGUCHI TAKEFUMI (JP)
ASAO YOSHIHISA (JP)
Application Number:
PCT/JP2004/008771
Publication Date:
December 23, 2004
Filing Date:
June 16, 2004
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
KUWABARA MASAHIRO (JP)
HIROTSU KENICHI (JP)
SHIMOGUCHI TAKEFUMI (JP)
ASAO YOSHIHISA (JP)
KUWABARA MASAHIRO (JP)
HIROTSU KENICHI (JP)
SHIMOGUCHI TAKEFUMI (JP)
ASAO YOSHIHISA (JP)
International Classes:
H01F38/30; H04B3/56; H01F17/06; H01F30/16; (IPC1-7): H04B3/56; H01F17/06
Foreign References:
| JP2001319815A | 2001-11-16 | |||
| JPH05219152A | 1993-08-27 | |||
| JPH10150390A | 1998-06-02 | |||
| JP2003075475A | 2003-03-12 | |||
| JP2002232331A | 2002-08-16 |
Attorney, Agent or Firm:
Miyakoshi, Noriaki (12th Floor ARK Mori Building, 12-32, Akasaka 1-chom, Minato-ku Tokyo, JP)
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