从相位噪声和杂散的角度分析了这些频率合成方案的优缺点。
We analyze the main advantages and disadvantages of these architectures, which mainly focus on the phase noise and spurs.
提出了一种实现宽覆盖、低相位噪声、低杂散的频率合成方法。
A method to realize a wide frequency-coverage frequency synthesizer with low spurious level and low phase noise level is proposed in this paper.
由于高阻电路容易拾取杂散的辐射噪声，所以需要采取屏蔽措施。
Shielding is required because high impedance circuitry is susceptible to pickup of spurious radiated noise.
并给出了相噪和杂散的测试结果，并对设计和调试中应注意的问题作了说明。
This paper also gives the testing results of the phase noise and spurs, with descriptions of the hints in the design and debugging phase.
阵列测向中空间相关噪声、杂散的多径反射噪声以及空间杂散干扰是影响测向性能的较大因素。
The performance of direction of arrival estimation is strongly effected by spatial scatter noises such as interference, multiple propagation noise or other spatial correlated noises.
广泛采用的直接数字式频率合成方法，却面临输出频率上限难以提高和输出杂散的难以抑制两个难题。
Therefore, the frequency synthesizer works in millimeter wave band is mostly designed and realized by the way of indirect phase lock frequency synthesis, based on specific integrated circuit.
本课题的目的是设计一个适用于该频谱分析仪的宽频率范围、精细频率步进、低相噪及低杂散的合成扫频源。
The purpose of this project is to design a wide frequence band, fine frequency step, low phase noise and low spur synthesis sweeping source suited for the spectrum analyser.
基于对杂散的分析，本设计利用AD 9858完成了300mhz带宽的宽带线性扫频源的设计与硬件实现。
According to the analysis of spur performance, this design makes AD9858 achieve wide-band frequency sweeping of 300mhz.
讨论了两种误差对NCO杂散的影响，介绍采用相位抖动技术以提高无杂散动态范围，给出了仿真结果和实例。
This paper introduces phase dither technique to improve specification of SFDR, and analyzes two error influencing SFDR. It also shows the simulation result and the practice example.
为了能有效的抑制DDS的杂散，讨论了DDS杂散的三个主要来源并分析了部分杂散对DDS输出频谱的影响。
For the effective suppression of DDS spur, the paper has discussed three main origins of DDS spur and analyzed influence of the spur to the DDS output frequency spectrum.
whitespace是行业术语，指的是毗连电视频段的未使用的波段，它还可以为收到的杂散信号和其他干扰提供缓冲。
White space is industry lingo for the unused airwaves that abut TV spectrum and provide a buffer from stray signals and other interference.
除了大功率，由于低相噪和低杂散，该放大器也提供改进的性能。
In addition to high power, the amplifiers also provide improved performance due to very low phase noise and spurious.
讨论了陀螺在驱动、定向过程中的动力学特性，以及杂散磁场对陀螺漂移和转速衰减的影响。
Dynamical characteristics of the gyroscope during spin-up and erection procedure, and the influence of the stray magnetic field on gyro's drift and speed attenuation are investigated.
将电气系统正确的安装到船只上会减少杂散电流泄露的可能性，我们建议以下做法。
The correct installation of electrics on a boat will reduce the possibility of stray current leakage and the following actions are recommended.
通过对地铁杂散电流的危害及其产生原因的分析，从理论上提出了一种杂散电流监测的方法。
By analyzing the hazards and causes of stray current, theoretically raises a method for monitoring the stray current.
根据南京地铁杂散电流监测的要求，设计了一套地铁杂散电流监测实用系统。
A set of subway stray current monitoring system is designed in accordance with the requirements to monitoring the stray current in Nanjing subway.
介绍了隔膜烧碱生产中杂散电流腐蚀产生的原因及危害。
Causes and harms of the stray current corrosion in caustic soda production were introduced.
文章中通过三脉动模型中引入一个附加电容较好地模拟了杂散电容的影响。
Introducing an additional capacitive capacity into three pulse converter model, the influence of stray capacity is well simulated.
杂散电流泄露通常是配线系统破损或者磨损的结果，或者是由电线电气设备安装不当造成的。
Stray current leakage is usually a result of damage or wear to the wiring system or poor installation of wiring or electrical equipment.
阐述了三相异步电动机杂散损耗的测定的几种方法，通过不同的测法分析了杂散损耗的大小，最后通过直流机反转法试验杂散损耗，进行测定分析。
The paper descirbes several methods for the measurement of the stray loss of thee-phase asynchronous motor, and analyzes the amount of thray loss by using different measuring ways.
该环形设计保证了杂散磁场和高效，紧凑的封装最小的泄漏。
The toroidal design assures minimal leakage of stray magnetic fields and a highly efficient, compact package.
在大功率风电变换器中，由于杂散电感的存在，器件在关断过程中往往会产生超出允许范围的瞬态尖峰值，从而导致其失效和损坏。
In large production converters, due to the stray inductance, the switching transient spike is usually beyond the voltage allowed by the device, which can destroy the converter.
若开关、互连电缆和测试夹具没有合适的屏蔽，所产生的杂散信号（偏移）将威胁到被测信号。
Without proper shielding of the switches, interconnecting cables, and test fixturing, spurious signals (offsets) may be generated that will compromise the signal being measured.
杂散电流泄露通常被看做是引起各种类型船舶腐蚀的原因，但是这种问题多半可以追溯到电蚀作用。
Stray current leakage is quite often cited as the cause of corrosion on all types of vessel however more often than not the problem can be traced to a galvanic action.
在这些情况下，可向开关加入滤波器来改变信号的频率带宽，或者从发射到DUT的信号中消除有害频率的杂散信号。
In these cases, filters can be added to the switch to modify the signal frequency bandwidth, or spurious signals at unwanted fre quencies can be eliminated from the signal to the DUT.
如果所选用的电压传递函数电路对杂散电容不灵敏，那么实现的模拟阻抗电路对杂散电容也是不灵敏的。
If the selected voltage transfer function circuit is not sensitive to stray capacitance, then the implemented simulation impedance circuit is also not sensitive to stray capacitance.
结合仿真计算的结果，对影响杂散电流和接触电压分布的参数进行了比较和讨论，为系统设计提供了理论基础。
As to the results of simulation, compared and discussed the (parameters) that effect stray current and potential variation distribution, and proposed the theory basement for the system design.
解决这种杂散电流腐蚀的问题有很大的社会意义和经济意义。
The solution of such kind of stray current corrosion is of great social and economic significance.
随着电力变压器单台容量的增加，漏磁场及其在油箱和结构件中引起的杂散损耗明显增加。
With the development of capacity of transformer, the leakage magnetic is increasing which may enlarge the stray loss in the tank and structure.
偏移电流是开关卡产生的杂散电流(即使没有信号时)。
Offset current is a spurious current generated by a switching card even though no signals are applied.
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