| 摘要 |
The present invention has for its object to provide a piezoelectric oscillator that has improved secular variation characteristics and excels in suppressing undesired resonance. The piezoelectric oscillator has a piezoelectric vibrator and an oscillation transistor, and since a collector load resistance, a capacitance, a parallel circuit of a resistance and a capacitance, and said piezoelectric vibrator are connected between the collector of the transistor and an AC-wise grounded power supply, between the emitter and collector of the transistor, between the emitter of the transistor and the ground, and between the base of the transistor and the ground, respectively, it is possible to sharply reduce a current flow through the crystal vibrator, permitting suppression of frequency variations by the secular change characteristics of the oscillator; furthermore, the reduction of the current flow through the piezoelectric vibrator improves C/N and prevents undesired vibration and oscillation as well as decreases secular changes.
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