分析了用运算放大器组成正弦波振荡电路的起振条件和输出电压幅值的调节及选频网络的构成。
This paper is involved in the analysis of oscillation starting condition, output voltage amplitude adjustment, and frequency selection network composition of sinusoidal coave oscillation circuit.
它主要由二次谐波产生、和频产生、差频产生、光参量振荡等构成。
It mainly consists of harmonic generation, sum-frequency generation, difference-frequency generation, optical parametric oscillation and etc.
试验证明，对某机载雷达频综器中晶体振荡器的隔振系统的弹性特性研究和对其采取的隔振措施是行之有效的。
The experiment has proved that the research of elastic properties of vibration isolation system of the crystal oscillator and measures taken to prevent the vibration are very effective.
在上海天文台BPV标频和时间信号的发播工作中，使用了高精度石英晶体振荡器。
High precision quartz oscillators were used for the transmission of BPV standard frequency and time signals at Shanghai Observatory.
在上海天文台BPV标频和时间信号的发播工作中，使用了高精度石英晶体振荡器。
High precision quartz oscillators were used for the transmission of BPV standard frequency and time signals at Shanghai Observatory.
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