JPH0457778U

JPH0457778U -

Info

Publication number: JPH0457778U
Application number: JP9353590U
Authority: JP
Priority date: 1990-09-07
Filing date: 1990-09-07
Publication date: 1992-05-18

Description

[Brief explanation of the drawing]

第１図は本考案に使用される圧電振動子を示す
斜視図、第２図、第３図、第４図は圧電振動子の
変形例図、第５図は圧電振動子の駆動回路図、第
６図は圧電振動子の他の駆動回路図、第７図は従
来の圧電振動子を示す斜視図である。１……圧電素体、２……主電極、３……副電極
、４……マツチングトランス、５……出力アンプ
、６……抵抗、７……励振電極、８……高周波電
源。 FIG. 1 is a perspective view showing a piezoelectric vibrator used in the present invention, FIGS. 2, 3, and 4 are modified examples of the piezoelectric vibrator, and FIG. 5 is a drive circuit diagram of the piezoelectric vibrator. FIG. 6 is another driving circuit diagram of a piezoelectric vibrator, and FIG. 7 is a perspective view showing a conventional piezoelectric vibrator. DESCRIPTION OF SYMBOLS 1... Piezoelectric element body, 2... Main electrode, 3... Sub-electrode, 4... Matching transformer, 5... Output amplifier, 6... Resistor, 7... Excitation electrode, 8... High frequency power supply.

Claims

[Claims for Utility Model Registration] (1) A main electrode is provided approximately at the center of the front and back surfaces of the piezoelectric element, and sub-electrodes are arranged independently and facing each other on both sides of the main electrode,
A sidelobe suppressing device for a piezoelectric vibrator, characterized in that the excitation voltage phase of the main electrode and the excitation voltage phase of the sub-electrode are opposite in phase. (2) The main electrode has a triangular shape having an apex at approximately the center of the piezoelectric element, and the sub electrodes are formed to face each oblique side of the main electrode. Sidelobe suppression device for piezoelectric vibrators.