The efficiency of combining the stabilization and measurement functions of a quartz multi-frequency oscillation system

The research investigates the peculiarities of building high-stable quartz crystal oscillator (XO) with digital compensation of temperature frequency instability as one of the main destabilizing factors, which influence the accuracy characteristics of XO. The rise of stability of frequency oscillations of XO is reached with the help of more accurate compensation of temperature influences on the basis of identification of thermal state of quartz resonator (QR) in multi-frequency excitation mode. Multi-frequency excitation of QR ensures the combination of function of frequency stabilization (the basic function of QR) with measuring (additional function) allows to interpret piezo resonant oscillating system as multivariate object, in the model of which the control disturbance appear obviously. A comparative evaluation of the efficiency of determining the temperature of QR by means of a temperature sensor, which is located near the active zone on the surface of the piezo element (PE) and in the dual mode excitation, is given.