2005•Journal of Electron DevicesRequires access
A Novel Temperature Compensating Method for High-Frequency Overtone Crystal Oscillator
Feng Yuan Tan
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Abstract
A novel temperature compensating method for high-frequency overtone crystal oscillator will be presented. This method can overcome the disadvantage of frequency stability decline and phase noise deteriorated that brought by adding inductance and frequency multiplication in current high-frequency overtone temperature compensated crystal oscillator. To realize the temperature compensation for high-frequency overtone crystal oscillator, low-frequency ceramic oscillator is chosen and its output frequency is mixed with the output frequency of overtone crystal oscillator. The frequence deviation of overton crystal oscillator is directly compensated by the output frequency of ceramic oscillator. The experimental compensating result shows that using this method the frequency-temperature stability of 100 MHz 5th overtone temperature compensated crystal oscillator can achieve ≤±2×10 -6,in the temperature range 0～70℃.