Frequency synthesizer is the key component in electronic systems.
频率合成器是电子系统的核心部件。
DDS-driven PLL frequency synthesizer architecture is given in this paper.
给出了一种基于DDS驱动PLL的频率综合器结构。
A fully differential charge pump for a frequency synthesizer is proposed.
提出了一种应用于频率综合器的全差分电荷泵电路。
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。
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。
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。
An approach of a low spurious, low phase noise, agile frequency synthesizer was presented.
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。
Regenerative dividers play an important role in frequency synthesizer with its low phase noise.
再生分频器以其优越的相位噪声性能，在频率合成中有着重要作用。
A new phase noise estimate method for millimeter wave double PLL frequency synthesizer is presented.
提出了一种新的毫米波双环锁相源相位噪声估测方法。
The paper discusses a prototype of direct digital frequency synthesizer(DDFS) controlled by microcomputer.
本文介绍一个微机可控直接数字频率合成器（DDFS）的实验样机。
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 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 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。
When the frequency hop rate is more than tens of thousands, the design of frequency synthesizer is more complicated.
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。
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。
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。
Apart from target velocity, the dispersion of frequency synthesizer providing signals to radar also deteriorates the performance of radar.
除目标速度以外，为毫米波频率步进雷达提供频率信号的频率源的色散特性也会对雷达分辨率造成恶化影响。
Modern wireless communication requires that the frequency synthesizer should have fast settling time, small channel width and low phase noise.
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。
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。
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 method to realize a wide frequency-coverage frequency synthesizer with low spurious level and low phase noise level is proposed in this paper.
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 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。
Based on AD9954, a highly integrated frequency synthesizer, the operation and application theory of AD9954 in frequency hopping system are introduced.
在研究高集成度频率合成器ad9954的基础上，给出了AD 9954在跳频系统中的应用方案。
In the aspect of RF circuits, the scheme of frequency synthesizer and modem is proposed, and the feasibility of the scheme is verified by practical test.
在射频电路方面，提出了频率合成器和调制解调器设计方案，并通过测试证明了该方案的可行性。
Through comprehensive measurement of the frequency synthesizer, It shows that this synthesizer has good performance of the phase noise and spur restraint.
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。
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.
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 digital frequency synthesizer without ROM look up table is presented, a piecewise linear interpolation scheme is used to approximate a sinusoid function.
该方法使用具有分段连续的线性分段来近似正弦函数曲线的第一象限部分，根据正弦曲线的对称性，构成完整的正弦曲线。
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。
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。
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