| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an oscillation device capable of obtaining a stable oscillating frequency by compensating a change in the oscillating frequency with the passage of operation time of a quartz resonator. <P>SOLUTION: A difference value ΔF between a frequency difference between first and second quartz resonators after a prescribed time has passed from a reference time and a frequency difference between the first and second quartz resonators at the reference time (that is, a difference value ΔF between an amount of change in the frequency of the first quartz resonator from the reference time and an amount of change in the frequency of the second quartz resonator from the reference time ) is found. When the ratio of the amount of change in the frequency of the first quartz resonator to the amount of change in the frequency of the second quartz resonator is treated as the same with respect to the passage of time, the ratio is used as a correction factor for a change with the passage of time. and based on a value corresponding to the difference value ΔF and the correction factor for the change with the passage of time, a correction value on the frequency of the quartz resonator to make the output of the oscillation device is obtained. <P>COPYRIGHT: (C)2013,JPO&INPIT |
