JP2007096947A5 - - Google Patents

Claims (5)

A piezoelectric oscillator having a piezoelectric vibrator, a switch circuit for connecting the oscillating loop circuit and the power supply voltage line of the piezoelectric oscillator, ON / OFF operation control for controlling the ON / OFF operation of the switch circuit And a startup promoting voltage based on a power supply voltage is applied to the piezoelectric vibrator or the oscillation loop circuit via the switch circuit as the switch circuit is turned on. piezoelectric oscillator, wherein the time to apply a voltage 該励oscillation signal based on the time of the amplitude level is the maximum value of the excitation signal of the piezoelectric vibrator is when within the range of ± 0.1 [lambda]. 2. The piezoelectric oscillator according to claim 1, wherein the time for applying the activation promoting voltage is when the amplitude level of the excitation signal of the piezoelectric vibrator is a maximum value. A piezoelectric oscillator having a piezoelectric vibrator, a switch circuit for connecting the oscillating loop circuit and the power supply voltage line of the piezoelectric oscillator, ON / OFF operation control for controlling the ON / OFF operation of the switch circuit And a startup promoting voltage based on a power supply voltage is applied to the piezoelectric vibrator or the oscillation loop circuit via the switch circuit as the switch circuit is turned on. wherein the time to apply a voltage is when it reaches the range of the power excitation signal of the piezoelectric vibrator as a starting point when the voltage is applied (2 × λ) / 5~ ( 3 × λ) / 5 Piezoelectric oscillator. A piezoelectric oscillator having a piezoelectric vibrator, a switch circuit for connecting the oscillating loop circuit and the power supply voltage line of the piezoelectric oscillator, ON / OFF operation control for controlling the ON / OFF operation of the switch circuit And a startup promoting voltage based on a power supply voltage is applied to the piezoelectric vibrator or the oscillation loop circuit via the switch circuit as the switch circuit is turned on. The piezoelectric oscillator according to claim 1, wherein the voltage is applied when the excitation signal of the piezoelectric vibrator reaches λ / 2 from the time when the power supply voltage is applied. The switch circuit includes a transistor , and the ON / OFF operation control circuit is a capacitor connected between a base of the transistor and the power supply voltage line, and the switch circuit is configured by the charge current of the capacitor. 5. The piezoelectric oscillator according to claim 1, wherein a base current is supplied to the transistor to perform an ON operation, and the timing of the ON operation is set by a time constant of the capacitor.