JPS61162134U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案に係る圧電フイルターの分解
斜視図、第２図は同上の組立状態を示す斜視図、
第３図は完成品の縦断面図、第４図はラダー型フ
イルターの等価回路図、第５図はこの考案の係る
圧電フイルターの特性図である。 １……第１共振子、２，１２……圧電基板、３
，４，１３，１４……振動部、５，６，８，１５
，１６，１８……引出電極、１１……第２共振子
。 FIG. 1 is an exploded perspective view of a piezoelectric filter according to this invention, and FIG. 2 is a perspective view showing the assembled state of the same.
FIG. 3 is a longitudinal sectional view of the finished product, FIG. 4 is an equivalent circuit diagram of the ladder type filter, and FIG. 5 is a characteristic diagram of the piezoelectric filter according to this invention. 1... First resonator, 2, 12... Piezoelectric substrate, 3
, 4, 13, 14...vibration section, 5, 6, 8, 15
, 16, 18...extraction electrode, 11...second resonator.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 矩形状圧電基板に二つのエネルギー閉じ込め形
振動部が形成された第１共振子と第１共振子の組
合せによつて構成され、第１共振子は、圧電基板
の表面側に、一方振動電極から基板の第１の角部
に達する第１の引出電極と、他方の振動電極から
基板の第２角部と第２角部に達する第２の引出電
極を設け、裏面側は両振動電極を互いに接続する
と共に、両振動電極と連なつて基板の第４角部に
達する引出電極を設けて形成し、第２共振子は圧
電基板の表面側に、一方振動電極から基板の第３
共振子に達する第１の引出電極と、他方振動電極
から基板の第４の角部に達する第２の引出電極を
設け、裏面両側に両振動電極から第１角部と第２
角部間の辺に達する引出電極を設けて形成され、
前期第１共振子の裏面と第２共振子の表面を対向
面間に振動部分を確保して接着固定し、第１共振
子の裏面側引出電極と第２共振子の第２引出電極
及び第１共振子の第２引出電極と第２共振子の第
１引出電極を各々電気的に接続した圧電フイルタ
ー。 It is composed of a combination of a first resonator and a first resonator in which two energy-trapped vibrating parts are formed on a rectangular piezoelectric substrate. A first extraction electrode that reaches the first corner of the substrate and a second extraction electrode that reaches the second corner of the substrate from the other vibrating electrode are provided, and both vibrating electrodes are connected to each other on the back side. At the same time, an extraction electrode is provided to connect both vibrating electrodes and reach the fourth corner of the substrate.
A first extraction electrode that reaches the resonator and a second extraction electrode that reaches from the other vibrating electrode to the fourth corner of the substrate are provided.
It is formed by providing an extraction electrode that reaches the side between the corners,
The back surface of the first resonator and the front surface of the second resonator are adhesively fixed with a vibrating portion secured between the opposing surfaces, and the back side extraction electrode of the first resonator, the second extraction electrode of the second resonator, and the A piezoelectric filter in which a second extraction electrode of one resonator and a first extraction electrode of a second resonator are electrically connected.