Piezoelectric oscillator

摘要

Provided is a piezoelectric oscillator to attain high-frequency performance and frequency stabilization with the use of reflection characteristics of a reflective element. A piezoelectric oscillator is configured such that a resonant circuit is connected to a gate of a field effect transistor; an output terminal is connected to a drain and a power supply voltage V is applied to the drain; a piezoelectric resonator is connected to a source, as a reflective element; and a resonance frequency of the resonant circuit and an oscillation frequency of the piezoelectric resonator as a reflective element are set to substantially the same frequency, and further, the piezoelectric oscillator may be configured such that a first matching circuit is provided between the resonant circuit and the gate, second matching circuit is provided between the drain and the output terminal, and a third matching circuit is provided between the source and the reflective element.

主权项

1. A piezoelectric oscillator comprising a transistor, wherein:
one end of a resonant circuit is connected to a gate of the transistor; another end of the resonant circuit is grounded via a resistor; an output terminal is provided for a drain of the transistor; a piezoelectric resonator for causing reflection by resonance is connected to a source of the transistor; the piezoelectric resonator serving as a reflective element resonates by use of reflection characteristics and output an oscillation frequency; and the oscillation frequency of the piezoelectric resonator and a resonance frequency of the resonant circuit are set to substantially the same frequency.