频率合成器是电子系统的核心部件。
Frequency synthesizer is the key component in electronic systems.
频率合成器是现代通信系统的重要组成部分。
The frequency synthesizer is a important part in modern communication system.
介绍了一种机载合成孔径雷达频率合成器的实验研究。
An experimental study on frequency synthesizer of are airborne radar is described.
提出一种新的面积优化的直接数字频率合成器设计方案。
An area-efficient design proposal of a direct digital frequency synthesizer is presented.
在通信领域中，锁相环频率合成器起着越来越重要的角色。
In the field of communications, PLL synthesizers playing an increasingly important role.
本文主要介绍利用谐波混频技术设计的X波段频率合成器。
An X-band frequency synthesizer designed with harmonics mixing technology is presented.
着重研究了直接数字式频率合成器（DDS）的频谱特性。
The spectrumcharacteristic of the direct digital frequency synthesizer(DDS )is mainly stud-ied in this paper.
在锁相环频率合成器中，双模前置分频器是一个速度瓶颈。
In PLL frequency synthesizers, dual modulus prescaler is a bottleneck in achieving a higher operation speed.
当跳频的速率达到每秒数以万计时，频率合成器的设计将要复杂得多。
When the frequency hop rate is more than tens of thousands, the design of frequency synthesizer is more complicated.
研究一种跳频通信机低杂散、低相噪快速捷变频率合成器的实现途径。
An approach of a low spurious, low phase noise, agile frequency synthesizer was presented.
介绍了锁相式频率合成器的工作原理以及频率合成器关键的性能指标。
The basic working principle and the crucial parameters of phase locked synthesizer are introduced in this paper.
在甚高频系统中，射频的的频率合成器部分采用DDS/PLL技术。
In the ultra high frequency system, the frequency compounder section of the transmitting frequency is operated with DDS/PLL technology.
DDS在雷达频率合成器，尤其是在相控阵雷达中，有广阔的应用前景。
The DDS can be applied widely to the synthesizer of radar, specially in the phased array radar.
介绍了高速中规模集成数字频率合成器、晶体管高频大功率放大器的设计。
The high-speed digital frequency mixer made of medium-scale integrated circuits and the design of a high power transistor amplifier are also presented.
该解调器由数字混频器、数字频率合成器(DDFS)和低通滤波器构成。
This initial demodulator incorporates a digital mixer, DDFS and low-pass filter.
系统地介绍了一种低杂散、低相位噪声、快速捷变频频率合成器的实现途径。
The paper presents a fast agile frequency synthesizer of low spurious, low phase noise.
文章重点讨论了本地载波解调中的直接数字频率合成器（DDFS）模块的设计。
The design of direct digital frequency synthesizer(DDFS)in the way of local carrier demodulation is mainly introduced.
阐述了AD 9951芯片的主要性能及其在快速频率合成器设计中的应用方法。
The high performance DDS chip AD9951 produced by ADI is adopted to design a frequency synthesizer in this paper.
提出了一种应用于数字视频编码器中直接数字频率合成器(DDS)的设计方案。
A design scheme is proposed for a direct digital synthesizer (DDS) used in digital video encoders.
频率合成器是现代电子系统的重要组成部分，是决定电子系统性能的关键设备之一。
Frequency synthesizer is one of the most important parts used in modern communication and electronic systems.
对铷频标中的频率合成器内的程序分频器进行了设计，并介绍了改进后的程序分频器。
A programmable divider used in frequency synthesizer of Rb frequency standard is designed, and the improvement of programmable divider is introduced.
直接数字频率合成器dds具有极高的分辨率、频率转换速度快、相位噪声低等优点。
Direct Digital Synthesizer (DDS) has the advantages of high frequency resolution, rapid frequency change rate and low phase noise.
文章介绍了直接数字频率合成器(DDS)的基本工作原理，同时对其杂散进行了分析。
The paper introduced the working principle of the direct digital frequency synthesizer (DDS) and its spurious analysis is performed.
详细介绍了一种用于电子侦察与对抗系统中的宽带、高分辨率、低相位噪声频率合成器。
A broadband, high resolution and low phase noise frequency synthesizer used in electronic detection and electronic countermeasure system is described in detail.
频率合成器是射频收发机中非常重要的模块，是用于频率转换和频道选择的本地振荡源。
Frequency Synthesizer (FS) is a very important block, which is used in a wireless transceiver as a local oscillator for frequency translation and channel selection.
这对于高纯频率捷变合成信号源和军用数字通信设备中频率合成器的设计具有重要意义。
It has important significance in the design of high purity spectrum agile signal synthesizer and frequency synthesizer in military digital communication equipment.
本文分析了数字锁相环路的寄生频偏，它是现代通讯系统中频率合成器的重要指标之一。
This paper gives an analysis of parasitic frequency deviation in the digital phase locked loop, which is one of the important specifications of modern communication systems.
通过对频率合成器性能指标的测试，该频率合成器具有较好的相位噪声和杂散抑制性能。
Through comprehensive measurement of the frequency synthesizer, It shows that this synthesizer has good performance of the phase noise and spur restraint.
最后，对分数分频与整数频率合成器进行了理论上的分析和比较，并通过实验得到了验证。
At last, the difference between FNPLL and NPLL frequency synthesizer's performance is discussed and analyzed theoretically, and it is testified in the experiment.
由于相位舍位会导致直接数字频率合成器(DDS)的输出产生杂散，使其频谱特性恶化。
As we know, spurious noise of a DDS resulted from phase truncation degrades its spectral characteristics.
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