| 摘要 |
PURPOSE:To reduce the influence of unnecessary external vibration by vibrating a vibration body by >=2 piezoelectric elements for driving. CONSTITUTION:The output terminal of an oscillation circuit 24 is connected to the electrode 22a of a piezoelectric element 16a for driving through a fixed resistor 26a and the electrode 22b of a piezoelectric element 16b for driving through a fixed resistor 26b. Consequently, the output of a piezoelectric element 16c for feedback is fed back to the elements 16a and 16b through the circuit 24 and this vibrator 12 vibrates itself. In this case, the vibration body 14 of the vibrator 12 vibrates in the composite direction of the two driving directions of the elements 16a and 16b. Therefore, the amplitude of the vibration body 14 becomes larger than before. Further, the vibration attitude of the vibration body 14 is stable against mechanical state changes such as a secular change and temperature variation. |
