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.
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 is the key component in electronic systems.
频率合成器是电子系统的核心部件。
The paper introduced the working principle of the direct digital frequency synthesizer (DDS) and its spurious analysis is performed.
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。
Direct Digital Synthesizer (DDS) has the advantages of high frequency resolution, rapid frequency change rate and low phase noise.
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。
The design of direct digital frequency synthesizer(DDFS)in the way of local carrier demodulation is mainly introduced.
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。
A broadband, high resolution and low phase noise frequency synthesizer used in electronic detection and electronic countermeasure system is described in detail.
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。
An area-efficient design proposal of a direct digital frequency synthesizer is presented.
提出一种新的面积优化的直接数字频率合成器设计方案。
Frequency synthesizer is one of the most important parts used in modern communication and electronic systems.
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。
The frequency synthesizer is a kind of discrete frequency singal generator with high stability, and it is widely used in communication, radar, apparatus and navigation system.
频率合成器是一种频率稳定度较高的离散间隔型频率信号发生器，广泛应用在通信、雷达、仪器仪表及导航系统中。
The zero-crossings of the AC voltage and digital frequency synthesizer are used in solving the two main problems in frequency hopping system-synchronization and fast frequency synthesizing.
利用电力系统三相交流电压过零点和高速数字频率合成器解决了跳频系统中同步和快速频率合成的两个关键问题。
An experimental study on frequency synthesizer of are airborne radar is described.
介绍了一种机载合成孔径雷达频率合成器的实验研究。
At first, this paper described the basic structure, working principle, sources of spurious signals and characteristics of output spectrum, of direct digital frequency synthesizer (DDS).
首先分析直接数字频率合成器(DDS)的基本结构、工作原理、杂散来源、输出频谱特性。
The high performance DDS chip AD9951 produced by ADI is adopted to design a frequency synthesizer in this paper.
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。
An X-band frequency synthesizer designed with harmonics mixing technology is presented.
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。
Filter is a key unit of adjacent frequency channel synthesizer and coupling problem is a key point in the design of a filter.
滤波器是邻频频道合成器的关键部件之一，而耦合问题又是滤波器设计的关键。
A programmable divider used in frequency synthesizer of Rb frequency standard is designed, and the improvement of programmable divider is introduced.
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。
The spectrumcharacteristic of the direct digital frequency synthesizer(DDS )is mainly stud-ied in this paper.
着重研究了直接数字式频率合成器（DDS）的频谱特性。
The paper presents a fast agile frequency synthesizer of low spurious, low phase noise.
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。
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.
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。
It has important significance in the design of high purity spectrum agile signal synthesizer and frequency synthesizer in military digital communication equipment.
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。
The frequency synthesizer is a important part in modern communication system.
频率合成器是现代通信系统的重要组成部分。
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.
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。
Miniaturization is an important research direction in modern electronic communication system, and the design of RF channel emphasizes the miniaturization design of frequency synthesizer.
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。
In the paper it was studied that the frequency synthesizer and multiplier and the phase modulation circuit of the rubidium atomic frequency standards (RAFS).
本论文重点是研究被动型铷原子频标中的调制电路、频率合成电路和倍频电路。
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.
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。
A novel method to develop a frequency synthesizer with wide frequency coverage, fast frequency switching speed, and low phase noise is proposed.
提出了一种宽相对覆盖、低相位噪声的捷变频频率合成方法。
A novel method to develop a frequency synthesizer with wide frequency coverage, fast frequency switching speed, and low phase noise is proposed.
提出了一种宽相对覆盖、低相位噪声的捷变频频率合成方法。
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