Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
BALANCE FILTER
Document Type and Number:
WIPO Patent Application WO/2019/159774
Kind Code:
A1
Abstract:
A common mode signal is attenuated in a pass band. A balance filter (1) comprises: an unbalanced terminal (T1); an unbalanced-side inductor (L2); a first balanced terminal (T21); a second balanced terminal (T22); a balanced-side inductor (L3); a power source line (4); and a matching circuit (5). The unbalanced-side inductor (L2) is inserted between the unbalanced terminal (T1) and a ground. The balanced-side inductor (L3) is inserted between the first balanced terminal (T21) and the second balanced terminal (T22), and is electromagnetic-field-coupled with the unbalanced-side inductor (L2). A first terminal (41) of the power source line (4) is connected to the center part (M1) of the balanced-side inductor (L3), and a second terminal (42) is connected to a DC power source (7). The matching circuit (5) matches a first impedance between the first balanced terminal (T21) and the second terminal (42) of the power source line (4) with a second impedance between the second balanced terminal (T22) and the second terminal (42) of the power source line (4).

More Like This:
Inventors:
SHIOKAWA NOBORU
Application Number:
PCT/JP2019/004169
Publication Date:
August 22, 2019
Filing Date:
February 06, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H7/42; H01F17/00; H01F19/06; H01F27/00; H03H7/09; H03H7/38
Foreign References:
JP2003018039A2003-01-17
US20120139658A12012-06-07
JP2003007537A2003-01-10
US20090039977A12009-02-12
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (JP)
Download PDF:



 
Previous Patent: SECONDARY CELL

Next Patent: CHIP RESISTOR