一种双环路频率综合器及其相位噪声分析方法。
The invention relates to a double-loop frequency synthesizer and a phase noise analyzing method.
提出了一种应用于频率综合器的全差分电荷泵电路。
A fully differential charge pump for a frequency synthesizer is proposed.
给出了一种基于DDS驱动PLL的频率综合器结构。
DDS-driven PLL frequency synthesizer architecture is given in this paper.
频率综合模块是雷达重要部件之一，为整部雷达提供相参频率源。
Frequency synthesizer module is a very important part in the radar system, which provided coherent frequency source.
本文介绍了应用在单芯片FM接收系统中可变带宽频率综合器的设计。
This paper presents a design of Adaptive-Bandwidth Frequency Synthesizers used in single chip FM receiver system.
该频率综合器采用模拟调谐和数字调谐相结合的技术来提高相位噪声性能。
A combined tuning technique of digital tuning and analog tuning is used to improve the phase noise of frequency synthesizer by decreasing the gain of VCO.
现代无线通信要求频率综合器同时满足快速切换时间，小信道宽度和低噪声性能三方面的要求。
Modern wireless communication requires that the frequency synthesizer should have fast settling time, small channel width and low phase noise.
提出一种基于粗集理论的，把属性的重要性和属性值的出现频率综合起来进行规则推理的方法。
Based on rough set theory, a rule inference approach of integrating the importance of attributes with the emergence frequency of attribute value is proposed.
介绍一种低相噪、捷变频x波段频率综合器设计方法，并进行理论分析、计算，最后给出测试结果。
A design method for low phase noise agile X-band frequency synthesizer is presented, the theoretic analysis and calculation is performed and the test results are given.
频率综合器是SRD收发器的关键模块，本文主要工作是研究与设计应用于SRD收发器的频率综合器。
Frequency synthesizer is the key block of SRD transceivers, and this thesis concentrates on the research and design of frequency synthesizers for SRD applications.
仿真结果表明，该锁相环频率综合器达到了设计指标，可以应用于两次变频的“宽带中频”集成接收机。
The simulation results show that the designed PLL frequency synthesizer meets the design specification and it can be used in the integrated wideband if with double conversion wireless RF receiver.
针对电流型电荷泵PLL频率综合器芯片，提出一种称为极值相位裕量的无源环路滤波器方案和设计方法。
A passive loop filter scheme and the design method of the filter for current charge pump PLL frequency synthesizer chip are given in the paper.
小型化是现代电子通信系统的一个重要的研究方向，射频信道的小型化设计重点是频率综合器的小型化设计。
Miniaturization is an important research direction in modern electronic communication system, and the design of RF channel emphasizes the miniaturization design of frequency synthesizer.
本发明公开了一种双环路频率综合器及其粗调环路的调谐方法，属于无线收发机中的 频率综合器技术领域。
The invention discloses a dual-loop frequency synthesizer and a tuning method of rough adjustment loop thereof, belonging to the field of frequency synthesizer in wireless transceiver.
给出了采用AD985 4芯片构成的低相噪频率综合源的硬件组成以及系统实测的相位噪声、杂散技术指标。
The hardware constitution of a low phase noise frequency synthesizer using AD9854 and the measured performances of system phase noise and spurious spectrum are presented.
这种方法基于频率综合器的频域模型，能比较准确地预测分频器的相位噪声和它对整个频率综合器相位噪声的影响。
Based on the frequency-domain model of synthesizer, the method can accurately predict the phase noise of the divider and its influence to the phase noise of synthesizer.
由于锁相环电路具有的窄带、跟踪、滤波等优点，因此在现有的雷达系统中，普遍采用由锁相环构成的频率综合器。
Frequency synthesizer composed of PLL is widely used in radar system because of PLL specialties such as narrow band, signal tracking and filter.
介绍了一种应用直接数字频率综合器（DDS）技术，基于可编程逻辑器件（CPLD）和单片机设计的低频信号源。
According to the technology of direct digital synthesis(DDS), a kind of low frequence signal source was introduced based on the Complex Programmed Logical Device(CPLD)and Single Chip Micyoco(SCM).
介绍低相噪NPLL频率综合器的设计及实验结果。提出用无源环路滤波器比用有源环路滤波器更好，可获得低相噪设计。
This paper gives the design and experimental results of low noise NPLL frequency synthesizer and concludes that the passive loop filter is more suitable for low noise design than active loop filter.
提出了一种间接合成的低相位噪声频率综合器的设计，该频综器用于某机载雷达中，从而要求其在极其恶劣的环境中同样具有良好的性能。
This paper presents a low phase noise indirect frequency synthesizer, which used in airborne fire control radar and is required to operate in a very harsh environment.
随着综合的频率，测试每一个构建都将有助于减少不稳定的峰值。
As with the integration heartbeat, testing every build will help reduce spikes of instability.
它通过综合ads - B状态向量、飞行器目标和其它信息，来减少非必要的警报频率。
It will also reducing unnecessary alarm rate by incorporating the ADS-B state vector, aircraft intent, and other information.
系统设计必须在采样频率、系统设计指标和实现成本之间进行综合考虑。
The system design must be synthetically considered among the sampling frequency, system design index and implementing cost.
强调了水文频率计算中对统计参数和设计值进行综合平衡和合理性分析的重要性。
It is emphasized on the importance of comprehensive balance and rationality analysis of statistical parameters and design values in hydrologic frequency computation.
世代数受火干扰频率、火干扰强度及两者的综合影响，相对来说以火干扰强度的影响更为显著。
The fire frequency, fire intensity and their synthetical regime influenced the number of cohort strongly, while the effect of fire intensity was more significant.
车辆使用条件越恶劣，就需要频率更高的保养。这就需要车厂提供综合考虑驾驶和维护费用的一般的保养周期。
Products used more harshly require more frequentservicing. This has led to the development of systems that determine thefrequency of routine maintenance based on driving and cost considerations.
得到了系统在不同的输入转矩波动、齿侧间隙、齿轮综合误差、激励频率和阻尼比参数下系统的全局特性。
The system's global characters are obtained under different input torque fluctuation, backlash, composite transmission error, exciting frequency and damping ratio.
其根本差别只在于保证率频率法是人为地确定频率，而综合历时曲线法本身固有一个频率。
The substantial difference lies in that guaranteed rate frequency method determines the rate artificially, but synthetic duration curve method has its intrinsic frequency.
根据这一振动模型，推导了齿轮副的平均单齿刚度、单对轮齿啮合综合刚度、有效质量、固有频率与临界转速等一系列计算公式。
The model is used to understand a series of formulae, for example, mean single tooth stiffness, gear pair mesh synthesizing stiffness, effective mass, nature frequency and critical rotating speed.
本文提出了通过系统设计的方法将频率捷变雷达综合测试仪频率跟踪精度的检定在中频进行。
The system design method proposed by the paper examines the frequency tracking accuracy of the frequency agile radar synthesis detection unit at intermediate frequency.
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