Crystal oscillator that utilizes the power transistor of an output amplifier to heat the crystal resonator
AssigneeNihon Dempa Kogyo Co., Ltd.
InventorTakeo Oita
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Abstract
A crystal oscillator according to the present invention prevents abnormal oscillation at a temperature in a low-temperature area equal to or lower than an ordinary temperature. The crystal oscillator is configured such that a crystal vibrator is made to abut against a heat source, and the temperature of the crystal vibrator can be kept higher than a temperature where abnormal oscillation occurs. The temperature of the crystal vibrator is assumed to be, for example, higher than 0° C. Additionally, as the heat source, for example, a power transistor that amplifies an oscillation output is used.
Claims9
A crystal oscillator, comprising:
- an oscillation unit comprising a crystal vibrator having a frequency-temperature characteristic with which a resonance frequency changes according to a temperature, and an oscillation circuit unit;
- and
- a heat source unit, which abuts against the crystal vibrator, keeping a temperature of the crystal vibrator higher than a temperature where the crystal vibrator causes abnormal oscillations,
- wherein said heat source unit is configured by a power transistor which amplifies an oscillation output.
A crystal oscillator, comprising:
- an oscillation unit having a crystal vibrator;
- and
- a heat source unit keeping a temperature of the crystal vibrator higher than a temperature where the crystal vibrator causes abnormal oscillation,
- wherein said heat source unit is configured by a power transistor which amplifies an oscillation output.
The crystal oscillator according to claim. 4, wherein said heat source unit keeps the crystal vibrator at a temperature higher than 0° C.
A crystal oscillator, comprising:
- oscillation means having a crystal vibrator;
- and
- heat source means for keeping a temperature of the crystal vibrator higher than a temperature where the crystal vibrator causes abnormal oscillation,
- wherein said heat source means is configured by a power transistor which amplifies an oscillation output.
A signal oscillation method preventing abnormal oscillation of an oscillator having a crystal vibrator, comprising:
- keeping a temperature of the crystal vibrator higher than a temperature where the crystal vibrator causes abnormal oscillation, using a heat source unit configured by a power transistor which amplifies an oscillation output;
- and
- outputting a signal in a state where the temperature is kept.
Dependencies are inferred from the claim text.