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Patent Searching and Data


Title:
FILTER
Document Type and Number:
WIPO Patent Application WO/2018/066578
Kind Code:
A1
Abstract:
A filter (101) is provided with: a series circuit comprising a first Zener diode (ZD1) and a second Zener diode (ZD2); and a third Zener diode (ZD3) and a third inductor (L3) connected between a connecting point (NP) and ground. A first serial resonant circuit (SR1) is configured from the first Zener diode (ZD1), a parasitic capacitance of the third Zener diode (ZD3), and the third inductor (L3), and a second serial resonant circuit (SR2) is configured from the second Zener diode (ZD2), the parasitic capacitance of the third Zener diode (ZD3) and the third inductor (L3). The parasitic capacitances of the first Zener diode (ZD1) and the second Zener diode (ZD2) are substantially equal, and the parasitic capacitance of the third Zener diode (ZD3) is greater.

Inventors:
UEKI NORIYUKI (JP)
Application Number:
JP2017/036052
Publication Date:
April 12, 2018
Filing Date:
October 04, 2017
Export Citation:
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Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H7/09; H01F27/00; H01L21/822; H01L27/04; H02H9/04
Domestic Patent References:
WO2015087794A12015-06-18
WO2017159282A12017-09-21
Foreign References:
US20100277256A12010-11-04
US20100277254A12010-11-04
JP2013012702A2013-01-17
US20110163352A12011-07-07
US20140160607A12014-06-12
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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