Performance of Piezo-Oscillators and the Influence of the Decrement of Quartz on the Frequency Oscillations

In Part I of this paper, the performance of piezo oscillators of the usual Pierce circuits is treated, on the basis of the resonance curves of the quartz (taken experimentally) and with the help of vector diagrams. In Part II, the influence of the decrement of the quartz resonator on the oscillation frequency is examined. This study has led to the development of an arrangement which permits the quartz to oscillate in proximity to its frequency of resonance and to reduce thereby the influence of the decrement on frequency to about 1/10 of that usually found.