| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology which can suppress electric energy by fundamental wave oscillation and reduce a phase noise in a piezoelectric oscillator using an overtone of thickness-shear vibration of a piezoelectric piece. SOLUTION: In a piezoelectric oscillator, an excitation electrode section in an electrode 2 on one surface side of a crystal piece 1 of an AT cut is formed as split electrodes 21 and 22 that are separated from each other in a direction (Z' axis direction) orthogonal to a thickness-shear vibration direction and formed in a strip shape in parallel. The edges of these electrodes are connected to each other so as to form a U-shape. In an electrode 3 on the other surface side, strip-shaped excitation electrode sections 31 and 32 are formed at a position opposed to the first split electrode 21 and the second split electrode 22 on the one surface side, respectively. The electrode is formed in a reverse U-shape. Therefore, only the split electrodes 21 and 22 function as the excitation electrode section. COPYRIGHT: (C)2011,JPO&INPIT
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