频率稳定

红外波段双线He-Ne激光的频率稳定

Frequency stabilization of infrared dual-line He-Ne laser

为了更好地解决上述问题，应用BP神经网络方法，以保证工作频率稳定。

In order to solve the above problems efficiently a frequency stabilization system , based on the BP neural network method is presented in the paper .

GPS时间比对的长期频率稳定度

The Long Term Frequency Stability in the GPS Time Comparison

被动式稳频CO2激光器频率稳定度的测量

Measurement of Frequency Stability of Passive Frequency Stabilized CO_2 Laser

GPS卫星原子钟频率稳定度表征方法分析

The Analysis of Frequency Stability 's Presenting Methods for Atomic Clocks of GPS Satellites

因此，提高SAW振荡器的频率稳定度是传感器研究的关键。

Hence , the improvement of SAW frequency stability is the key to SAW gas sensor research .

C波段高频率稳定度宽带FET电压控制振荡器

C Band High Frequency-Stability Broad Band FET Voltage-Controlled Oscillators

采用拍频法测量CO2激光器频率稳定度。

The frequency stability of CW CO 2 laser was measured with beat frequency method .

一种频率稳定的改进型CMOS环形振荡器

An Improved CMOS Loop Oscillator with Stable Frequency

引用晶体管静态工作点与h参数的关系曲线，分析了静态参量IC、VCE对振荡电路频率稳定、起振、振荡频率的影响。

The relation curve of static working point and parameter h is introduced in this paper .

频率稳定度描述：Allan方差估值的置信度问题

Characterization of Frequency Stability : The Confidence of Estimated Allan Variance

频率稳定的单纵模TEACO2激光器是相干探测CO2激光雷达的关键器件。

A frequency stabilized single longitudinal mode ( SLM ) TEA CO2 laser is the most important part of coherent detection CO2 laser radar .

这种材料具有高Q值，特别适用于X以上波段作为振荡器电路中频率稳定元件。

As this material has very high Q factor , it is widely applied for frequency stabilizing elements in oscillator circuits at frequencies above 12 GHz .

尤其是石英晶体谐振片采用了SC切型进一步提高了短期频率稳定度和加速度灵敏度。

Especially , the use of SC cut quartz crystal further improves the short-term frequency stability and acceleration sensitivity .

提出了谐振稳频振荡器的谐振腔有载Q值同频率稳定度的关系，及提高频率稳定度的方法。

Obtained the quantitative relationship for the frequency stability and the unloaded Q value , and the common approach to improve the quality of oscillator .

DDS是开环系统，无反馈环节，输出响应速度快，频率稳定度高。

DDS is an open-loop system without feedback , its frequency synthesis speed and frequency stability are very high .

对于一个实用的氢频标来说，其频率稳定度的测试，特别是实时稳定度测试，腔体调谐与线Q值的测试都是必不可少的。

For a hydrogen atomic frequency standard . Measurement of it 's stability , especially real-time stability , cavity tuning and line Q must be done .

该方案为实现高性能微型化CPT原子频标克服了一项重要技术阻碍，可望大幅改善微型CPT原子频标的频率稳定度性能。

This technological breakthrough overcomes a main obstacle for realizing high performance miniature CPT atomic frequency standard .

最后，适当调整PID参数，装配恒温晶体振荡器，对结果进行了测试和分析，最终实验结果表明，在应用新型控温电路，并采取单层恒温槽控温的情况下，其频率稳定度可以达到10-8量级。

At last , we test and analyze the results of OCXO . The experiment shows the frequency stability can reach 10-8 based the new temperature control circuit and single oven structure .

采用两镜腔型结构替代常规的四镜腔饱和吸收光谱装置，观测到稳定的铯原子D2线的超精细谱线，为激光频率稳定于铯原子的吸收峰奠定了较好的基础。

A stable cesium D2-saturation spectra is observed with this simplified setup instead of using the standard saturated absorption spectroscopy .

本文研制出调频响应达1.3GHz的LD模块，并根据WDM系统传输实验的需要，研制出频率稳定度优于上150MHz的2.4Gb／s光发送机。

The DFB-LD module with 1 . 3 GHz FM responce and 2.4 Gb / s optical transmitter with ± 150 MHz frequency stability are developed .

自动发电控制AGC是控制发电机有功出力来维持频率稳定，调整互联电力系统间交换功率来保证有功平衡的一种控制技术。

Automatic Generation Control is a control technology of maintaining the frequency stability and adjusting the active power balance in tie lines among interconnected power systems .

该调制器已成功地用于SF6分子的饱和吸收微分光谱的检测和将CO2激光频率稳定到SF6分子的吸收线中心的工作中。

We have recorded the differential spectrum of saturated absorption lines of SF6 and locked CO2 laser frequencies in the centers of several absorption lines of SF6 .

在国内阿仑方差（AllanVariance）通常用来表征原子频标的频率稳定度。

In our country Allan Variance usually be used to express frequency stability of atomic frequency standard , and Hadamard Variance usually be used to do the same at external .

本文讨论了影响CO2激光频率稳定度的主要因素以及稳定激光频率的一种有效方法，它能使频率的长期稳定度达到10~（-8）。

This paper discusses the factors affecting CO_2 laser frequency stability and an effective method of stabilizing CO_2 laser frequency . By this means the long-term frequency stability can be enhanced up to 10 ~ ( - 8 ) .

激光二极管（LD）抽运的固体激光器可用于光学计量、长度测量、相干光通信、激光雷达等方面，高精度应用要求激光器的频率稳定。

Diode pumped solid state laser can be used to optical metrology , length measurements , coherent optics communication and laser radar , the high precision applications need the laser frequency stabilization .

为了能够方便地产生波形平滑、频率稳定的正弦信号波形，提出了一种基于DDS技术的正弦信号发生器的设计方法。

To produce the smooth waveform with the stable frequency , this paper presents a design method of sine signal generator ′ s function circuit which is based on the DDS theory .

在确保所需调制频偏的情况下，通过调整环路反馈系数可减小变容管调制电路对Gunn振荡器中心频率稳定度的影响。

When the modulation sensitivity is enough , the loop feedback coefficent must be decreased for decreasing the influence of varactor diode to the oscillator frequency stability .

总之，逆变器交流输出电压和频率稳定精度均较高，电压波形的总谐波含量THD较低且正弦特性较好。

In short , the inverter AC output voltage and frequency stability precision are higher , and total harmonic content THD of voltage waveform is lower and sinusoidal characteristics are better .

本文利用并联谐振的相频特性曲线分析了克拉泼正弦波振荡器实验中的一现象，认为对Q值和频率稳定度的关系应全面理解。

In this paper we analyse some phenomenon in the experiment of the clapp oscillator by means of the phase-frequency curves of the parallel resonance and consider it necessary to look at the relation of the quality factor and frequency stability all sidedly .