Highly stable Colpitts piezoelectric oscillator has network with series, parallel resonant frequencies set close to oscillator's frequency and unwanted frequency to suppress unwanted oscillations

摘要

The oscillator has a piezoelectric unit (Y1) and an amplifier circuit, and a combined network containing an inductance and a capacitance is introduced into an oscillation loop and connected to it. A series resonant frequency of the network is set close to the oscillator's oscillation frequency and a parallel resonant frequency of the network is set close to an unwanted oscillation frequency to suppress unwanted oscillations.