| 摘要 |
PURPOSE:To stabilize the position of node of a vibrator by electrically connecting one part of a vibrating electrode with a common electrode in the period when voltage is not applied from outside to one part of the element of a vibration element. CONSTITUTION:Conduction circuits 104 and 105 have periods when they supply the signals from a distribution circuit 102 to the corresponding electrodes 3a and 3b being vibration elements and periods when they supply those signals to the common electrode 3c of a vibrator 3. A control circuit 103 directs the action of the distribution circuit 102 and the conduction circuits 104 and 105 so as to make the state where it does not supplies a signal to the side of phase A, the state where it supplies a signal to the side of phase B, and the state where it supplies a signal neither to the phase A nor to the phase B. And in the period when voltage is not applied from outside to one part each of the electrodes 3a and 3b being vibration elements, one part each of the electrodes 3a and 3b being the vibration elements and the common electrode 3c are connected electrically. Hereby, the position of the node of the vibrator 3 can be stabilized. |
