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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >High-frequency overtone TCXO based on mixing of dual crystal oscillators
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High-frequency overtone TCXO based on mixing of dual crystal oscillators

机译：基于双晶振荡器混合的高频泛音TCXO

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摘要

To implement a high-stability and high-frequency overtone temperature-compensated crystal oscillator (TCXO) conveniently, an improved design of the novel overtone TCXO is described in this paper. A 120-MHz TCXO based on mixing of dual crystal oscillators is implemented. It utilizes a 100-MHz AT-cut 5th-overtone crystal oscillator mixed with a 20-MHz AT-cut voltage-controlled crystal oscillator (VCXO). The 120-MHz mixed product is filtered to produce the output signal. The total frequency deviation of 20-MHz and 100-MHz crystal oscillators is compensated by adjusting the output frequency of the 20-MHz oscillator to produce the stable 120-MHz output frequency. In this work, verifying experimental results of the compensation are presented. The stability of the experimental 120-MHz overtone TCXO with microprocessor temperature compensation achieves plusmn2 times 10-7 over the temperature range from -30degC to +70degC. A phase noise level of -133 dBc/Hz at 1 kHz offset has been initially measured for the prototype TCXO. The experimental result demonstrates this approach can conveniently implement the high-frequency overtone temperature compensation with a relatively high stability, and it is available for a wider frequency range as well.
机译：为了方便地实现高稳定性和高频泛音温度补偿晶体振荡器（TCXO），本文描述了新型泛音TCXO的改进设计。实现了基于双晶振荡器混合的120MHz TCXO。它利用了一个100 MHz AT切割的5次泛音晶体振荡器和一个20 MHz AT切割的压控晶体振荡器（VCXO）。对120 MHz的混合产物进行滤波以产生输出信号。通过调整20 MHz振荡器的输出频率以产生稳定的120 MHz输出频率，可以补偿20 MHz和100 MHz晶体振荡器的总频率偏差。在这项工作中，提出了验证补偿的实验结果。具有微处理器温度补偿功能的实验性120 MHz泛音TCXO的稳定性在-30℃至+ 70℃的温度范围内达到10-7的mnmn2倍。最初已为原型TCXO测量了在1 kHz偏移下的-133 dBc / Hz的相位噪声电平。实验结果表明，该方法可以方便地实现具有较高稳定性的高频泛音温度补偿，并且还可以用于较宽的频率范围。

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