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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >A novel microcomputer temperature-compensating method for an overtone crystal oscillator
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A novel microcomputer temperature-compensating method for an overtone crystal oscillator

机译：泛音晶体振荡器的新型微计算机温度补偿方法

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摘要

In this paper, a novel microcomputer temperature-compensating method for an overtone crystal oscillator (MCOXO) is presented. In this method, a ceramic oscillator is chosen, and its output frequency is mixed with the output frequency of an overtone crystal oscillator. A crystal filter is used to suppress the spurious mixing products. A microcomputer is used to control the switch capacitance array that is connected to the ceramic oscillator circuit. The frequency deviation of the crystal oscillator is directly compensated by the output frequency of the ceramic oscillator. As a result, the method is able to overcome the disadvantages of frequency stability degradation and phase noise deterioration that are provoked by adding inductance or frequency multiplication in traditional compensating approaches. At the same time, this method is able to compensate a quite wide frequency range and many types of oscillators, not just crystal oscillators. The experimental compensating results show that, using this method, the frequency-temperature stability of a 100 MHz 5th overtone temperature-compensated crystal oscillator can achieve /spl les/ /spl plusmn/2/spl times/10/sup -6/ for 0-70/spl deg/C.
机译：本文提出了一种新型的泛音晶体振荡器（MCOXO）微机温度补偿方法。在这种方法中，选择陶瓷振荡器，并将其输出频率与泛音晶体振荡器的输出频率混合。晶体滤波器用于抑制杂散混合产物。微型计算机用于控制连接到陶瓷振荡器电路的开关电容阵列。晶体振荡器的频率偏差由陶瓷振荡器的输出频率直接补偿。结果，该方法能够克服在传统补偿方法中通过增加电感或倍频而引起的频率稳定性劣化和相位噪声劣化的缺点。同时，这种方法能够补偿相当宽的频率范围和许多类型的振荡器，而不仅仅是晶体振荡器。实验补偿结果表明，采用这种方法，一个100 MHz的第五个泛音温度补偿晶体振荡器的频率-温度稳定性可以达到/ spl les / / spl plusmn / 2 / spl次/ 10 / sup -6 / 0 -70 / spl摄氏度/℃。

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