【摘要】 提出了一种新的高频泛音晶体振荡器温度补偿的方法,它能克服了目前泛音晶振温补中均采用加电感和倍频的方法带来的稳定度下降和相噪恶化的缺点。该系统利用低频陶瓷振荡器的输出频率通过混频对高次泛音石英晶振进行温度补偿。系统采用微机控制开关电容阵,有利于集成。初步补偿结果表明,利用本文提出的补偿方法进行补偿的100MHz五次泛音石英晶体振荡器在0～70℃温度范围内频率-温度稳定性≤±2×10-6。更多还原

【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℃.更多还原