So the technology of frequency synthesis is very important.
所以频率合成技术十分重要。
The technology of frequency division phase-locked frequency synthesis is introduced.
介绍分频锁相频率合成技术。
The direct digital frequency synthesis(DDS) is a new frequency synthesis techniques.
直接数字频率合成是一种新的频率合成技术；
The technology of frequency synthesis has been called many electronic systems heart .
频率合成器被喻为众多电子系统的“心脏”。
The technique of direct digital synthesis(DDS)is a novel frequency synthesis technique.
直接数字频率合成（DDS）是一种新型的频率合成技术。
Direct digital frequency synthesis (DDFS) is an advanced technique for frequency synthesis.
直接数字频率合成技术(DDFS)是一种先进的频率控制技术。
The double channel arbitrary wave generator based on direct digital frequency synthesis is introduced.
介绍了基于直接数字频率合成技术的双通道任意波形信号发生器。
A fast agile frequency synthesis source of low spurious and low phase noise is presented in the article.
文中介绍一种低杂散、低相噪、快速捷变频频综源的实现途径。
The scheme adopted in the source is Direct Digital frequency Synthesis by frequency doubling and mixing.
频综源采用直接数字频率合成(DDS)加倍频、混频方案。
This thesis mainly discusses the Direct Digital Frequency Synthesis (DDS) technique and its applications.
本文主要讨论了数字频率直接合成(DDS)技术特点及其应用。
DDS hybrid PLL can take good advantage of both their merit, have become an important area of frequency synthesis.
PLL混合频率合成技术能综合两者的优点，已成为现今频率合成领域的重要研究方向。
This paper presents a new weather alarm emitter adapted digital coding and phase-locked frequency synthesis techniques.
本文提出了一种新的气象报警系统，此系统采用数字编码和镇相频率合成技术。
This paper introduces the design thought of a wide band digital frequency synthesis loop. The principle circuit is given.
介绍了一种宽带数字式频率合成环路的设计思想，给出了原理电路。
Offering direct digital frequency synthesis (DDFS) based on the frequency -phase to achieve the following sampling clock.
提出基于频相的直接数字频率合成技术（DDFS）实现采样的跟随时钟。
Combining the FPGA and traditional DDS method, it is the important improvement on conventional frequency synthesis method.
这种方法将现场可编程器件(FPGA)和传统的DDS方法相结合，是对传统频率合成方法的一次重要改进。
In this paper the principle and design of a microcomputer-controlled PLL frequency synthesis digit tuning system is discussed.
本文叙述了一个用微机控制的锁相环频率合成数字调谐系统的原理和设计。
Method Based on the digital frequency synthesis theory and FPGA, the main part of a multi-frequency signal source is accomplished.
方法：根据数字频率合成理论，基于FPGA实现了多频信号源的核心部分。
Digital look up table method for synthesizing periodic signals is the most popular technique for direct digital frequency synthesis.
数字查表法合成周期信号是一种最常用的直接数字频率合成技术。
This is the complete set of frequency synthesis parameters that are possible given our reference frequency and desired output frequency.
这是完整的一套鉴于我们参考频率和期望输出频率的可能的频率合成参数。
Network analyzer adopt these new technology such as frequency synthesis, sampling technique, broad-band sweeping and computer-assisted testing.
网络分析仪结合了频率合成技术、采样技术、宽带扫频技术、计算机辅助测量等新技术。
Direct digital synthesis is a kind of advanced technique on frequency synthesis, in this paper, the design and realized technique of DDS is given.
直接数字合成是先进的频率合成技术，给出了直接数字合成器的设计方法和实现技术。
The technology of frequency synthesis is important in latter-day communication system. It's widely used in wireless communication and electron system.
频率合成技术是近代通信系统的重要组成部分，在无线电通信与电子系统的各个领域中得到了广泛的应用。
DDS is an advanced technique on frequency synthesis, whose primary advantages are controlling facility, continuous phase and fine frequency resolution.
DDS技术是一种先进的频率合成技术，其主要优点是易于程控，相位连续，输出频率稳定度高，分辨率高。
So the researches on frequency synthesis at present are mainly focused on the complex of these techniques to foster strengths and circumvent weaknesses.
所以目前频率合成技术的研究主要是复合运用这三种技术来扬长避短。
This design construct an sinusoidal signal generator based on DDS(Direct Digital Frequency Synthesis), completed by MCU AT89S52 and necessary analog circuit.
本设计采用AT89S52单片机，辅以必要的模拟电路，实现了一个基于直接数字频率合成技术（DDS）的正弦信号发生器。
The direct digital frequency synthesis (DDS) is a kind of new frequency synthesis method. It has high frequency resolution, fast frequency switching speed, etc.
直接数字频率合成(DDS)是一种新的频率合成方法，具有频率分辨率高、切换速度快等优点。
In frequency synthesis by phase lock, the loop gain will vary by the same amount due to this effect, which generally im - pedes optimization of loop performance.
在锁相频率合成器中，由于压控灵敏度的变化，环路增益也将产生同样大小的变化，这就妨碍了环路特性的最佳化。
In frequency synthesis by phase lock, the loop gain will vary by the same amount due to this effect, which generally im - pedes optimization of loop performance.
在锁相频率合成器中，由于压控灵敏度的变化，环路增益也将产生同样大小的变化，这就妨碍了环路特性的最佳化。
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