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Patent Searching and Data


Title:
PIEZOELECTRIC OSCILLATOR
Document Type and Number:
Japanese Patent JP2001177346
Kind Code:
A
Abstract:

To stabilize output frequency, without disturbing miniaturization of a surface mount type crystal oscillator and to enhance the latitude of designing a wiring pattern.

Circuit components 9 of an oscillation circuit 2 and a buffer amplifier circuit 23 or the like are mounted in the inside of a box-shaped printed circuit board (ceramic multilayer board) 2, and a crystal vibrator package 3 is overlapped on the printed circuit board 2 and integrated. A shield conductive film 11 is provided only at a part opposed to a part of a resonance circuit deciding an oscillating frequency of the oscillation circuit 22 among the circuit components 9 of the oscillation circuit 22, even in the inside of the printed circuit board 2.


Inventors:
KATO AKIRA
FUNAHARA RIICHI
MURATA MITSUHIRO
FUJITA MAKOTO
Application Number:
JP35752399A
Publication Date:
June 29, 2001
Filing Date:
December 16, 1999
Export Citation:
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Assignee:
MURATA MANUFACTURING CO
International Classes:
H05K9/00; H01Q17/00; H03B5/32; (IPC1-7): H03B5/32; H01Q17/00
Attorney, Agent or Firm:
Nakano Masafusa