Title:
FILTER CIRCUIT, DIFFERENTIAL TRANSMISSION SYSTEM HAVING SAME, AND POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO/2006/040869
Kind Code:
A1
Abstract:
In a filter circuit (1), the impedance of a common mode choke (2) is extremely high to a common mode signal received at two input terminals (1a, 1b), and the impedance of a normal mode choke (3) is extremely low to the common mode signal. To the differential signal, the impedances are the reverse, and especially the difference between the impedances is great. Since the normal mode choke (3) is provided at the front stage of the common mode choke (2), the common mode noise entering through the two input terminals(1a, 1b) passes through the normal mode choke (3) and not the common mode choke (2), and is not reflected by the common mode choke (2). Especially, a common mode current flows through the normal mode choke (3) and not the common mode choke (2).
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Inventors:
SUENAGA HIROSHI
SHIBATA OSAMU
SAITO YOSHIYUKI
KATTA NOBORU
MIZUGUCHI YUJI
SHIBATA OSAMU
SAITO YOSHIYUKI
KATTA NOBORU
MIZUGUCHI YUJI
Application Number:
PCT/JP2005/014040
Publication Date:
April 20, 2006
Filing Date:
August 01, 2005
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
SUENAGA HIROSHI
SHIBATA OSAMU
SAITO YOSHIYUKI
KATTA NOBORU
MIZUGUCHI YUJI
SUENAGA HIROSHI
SHIBATA OSAMU
SAITO YOSHIYUKI
KATTA NOBORU
MIZUGUCHI YUJI
International Classes:
H01F17/00; H03H7/09; H01F27/00
Foreign References:
JPH08115820A | 1996-05-07 | |||
JP2000299615A | 2000-10-24 | |||
JPS5255809A | 1977-05-07 | |||
JPS5285448A | 1977-07-15 | |||
JPH0786863A | 1995-03-31 | |||
JPH07202616A | 1995-08-04 | |||
JPH0380708A | 1991-04-05 | |||
JPH1168497A | 1999-03-09 | |||
JPH04142824A | 1992-05-15 | |||
JP2003018224A | 2003-01-17 | |||
JPH04251557A | 1992-09-07 |
Attorney, Agent or Firm:
Ono, Yukio (South Forest Bldg. 1-4-19, Minamimori-machi, Kita-k, Osaka-shi Osaka 54, JP)
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