| 摘要 |
PROBLEM TO BE SOLVED: To obtain a temperature compensation piezoelectric oscillator which satisfies a temperature compensation accuracy of a piezoelectric oscillator, downsizing, low power consumption current, and the like, and improves a phase noise characteristic. SOLUTION: The temperature compensation piezoelectric oscillator has a temperature sensor 6 detecting a temperature, a compensation voltage generation circuit 7 generating a plurality of compensation voltages according to the temperature detection result of the temperature sensor 6, a piezoelectric oscillator 5 having at least a piezoelectric vibrator X and a MOS capacitive element, and oscillating with a predetermined oscillation frequency by applying a compensation voltage from the compensation voltage generation circuit 7 to the MOS capacitive element, and a noise removal circuit 8 selecting any of the compensation voltages outputted from the compensation voltage generation circuit 7 based on the output of the temperature sensor 6 and removing a noise superimposed on the selected compensation voltage. COPYRIGHT: (C)2009,JPO&INPIT
|
