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Patent Searching and Data


Title:
CRYSTAL FILTER
Document Type and Number:
Japanese Patent JPH09260997
Kind Code:
A
Abstract:

To improve the out-band attenuation of a high frequency fundamental wave filter of an UM type package.

Terminal sections 41, 52 of input output electrodes 4, 5 provided to a vibration section 3 of a blank 1 are extracted to the left and right and formed on a frame 2 of the blank and a terminal section of an earth electrode 6 of a rear side is extracted down ward and formed on the frame section of the blank. Since lead terminals of the electrodes 4, 5, 6 are formed separately and a direct wave propagated on the blank frame and causing a noise is reduced more than the case with extracting all of the lead terminals of the electrodes 4, 5, 6 downward in a conventional filter, the out-band attenuation is increased.


Inventors:
TANAKA MASAKO
NAKANO ISAO
Application Number:
JP6954796A
Publication Date:
October 03, 1997
Filing Date:
March 26, 1996
Export Citation:
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Assignee:
MEIDENSHA ELECTRIC MFG CO LTD
International Classes:
H03H9/05; H03H9/19; H03H9/56; (IPC1-7): H03H9/19; H03H9/05; H03H9/56
Attorney, Agent or Firm:
Fujiya Shiga (1 person outside)