The fine performance of an ovenized oscillator is dependent on the thermal behavior of the quartz resonator, especially when there are thermal transients. In this paper, the thermal behavior of the quartz is simulated by a finite difference technique including nonlinearity as an effect of radiation. This method, based on the electrical analogs of the thermal parameters, provides an easy interaction with the electrical parameters of the oven control. A model fitting various resonator configurations, like a flat pack or a BVA resonator, is proposed. The temperature of the direct quartz environment is compared with a reference. It acts on the heating elements that are electronically driven into a closed loop. The simulation results obtained in practical situations are compared for various types of resonator assembly, in relation to heating and thermal loss parameters.
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