Effect of Heating Current on the Temperature Stability of Oven-Controlled Crystal Oscillators
The miniaturization of oven-controlled crystal oscillators(OCXO)is necessary for developing commu-nication technology.When developing a small-sized OCXO,we found that frequency curves of the OCXO leaned up-wards uniformly when ambient temperature increased from-40 to 85℃,failing to satisfy the requirement of±3×10-9.Variations in the heating current of the oscillator with temperature cause biasing voltage fluctuations in the variable diode when current flows through the ground pin made of metal with low conductivity.This problem was solved using the proposed dual ground pin and passive compensation methods.
oven-controlled crystal oscillatorsheating currentfrequency and temperature range stabilityvari-able diodedual ground pincompensation method
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