| 摘要 |
PURPOSE:To adjust a temperature characteristic and frequency, by providing a weight on a part where the temperature characteristic is not varied, of a long edge part, and a part where it is varied, of a vibrating part of a GT-cut quartz oscillator, and increasing or decreasing the weight by means of vapor-deposition or spattering. CONSTITUTION:In case when a weight is provided long in the long edge direction of a GT-cut quartz oscillator if the weight is provided in both ends of the long edge and around the center, a temperature characteristic of the oscillator is varied, and in case when the weight is provided around 1/3 and 2/3 of the long edge, only frequency is varied. In case when weights 10, 11 and 12 have been provided in the long edge direction, if mass of the weight 11 is increased, the primary coefficient and the secondary coefficient of the temperature characteristic are varied in the negative direction, and when mass is decreased, they are varied in the position direction. Even if the weight 10, 12 are increased or decreased, the temperature characteristic is not varied, and only oscillation frequency can be adjusted independently by adjusting the weights 10, 11 and 12 by means of vapor-deposition or spattering. |
