Title:
FREQUENCY ADJUSTMENT OF PIEZO-ELECTRIC PORCELAIN VIBRATOR
Document Type and Number:
Japanese Patent JPS52132654
Kind Code:
A
Abstract:
PURPOSE: To obtain the porcelain filter without spurious by controlling the polarization degree of the piezoelectric porcelain vibrator delicately and by changing the frequency interval between fundamental resonance and subresonance.
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Inventors:
TAKAHASHI SADAYUKI
INOUE TAKESHI
INOUE TAKESHI
Application Number:
JP4907776A
Publication Date:
November 07, 1977
Filing Date:
April 28, 1976
Export Citation:
Assignee:
NIPPON ELECTRIC CO
International Classes:
H03H3/04; (IPC1-7): H01L41/00; H03H9/32