Direct digital synthesis (DDS) is an all digital frequency synthesis technique. Because of its special theory and construction, it has many kinds of modulation capability.
直接数字式频率合成(DDS)技术是一种全数字频率合成技术，其特殊的原理和结构使它具有多种调制能力。
A modified direct digital frequency synthesis (DDS), pipelined structure, and time-sharing ROM are adopted in the chip, for saving chip area and ensuring high performance and speed.
该芯片采用了改进的直接数字频率合成算法、流水线结构与ROM分时复用技术，保证了芯片的高性能和速度，节省了芯片面积。
AIM: to compare the performance of two exciting sources based on direct digital synthesis (DDS) technology and to present some advice for the future system design.
目的：比较两种基于直接数字合成技术的阻抗激励源的性能，为以后阻抗系统设计提供指导。
This paper introduces the theory of the phase-locked loop (PLL) and the direct digital synthesis (DDS), a method to improve the precision of DDS and reduce its phase truncation error is also given.
介绍了锁相环(PLL)技术和直接数字式频率合成(DDS)技术的基本工作原理，给出了一种提高DDS输出频率精度及减小其相位截断误差的方法。
Direct digital synthesis (DDS) is an advanced all digital frequency synthesis technology, based on the PM function of DDS, this paper gives the design scheme of a DDS digital phase shifter.
直接数字式频率合成技术(DDS)是一种先进的全数字频率合成技术，本文基于DDS的相位调制功能，给出了一种DDS数字移相器的设计方案。
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。
According to the technology of direct digital synthesis(DDS), a kind of low frequence signal source was introduced based on the Complex Programmed Logical Device(CPLD)and Single Chip Micyoco(SCM).
介绍了一种应用直接数字频率综合器（DDS）技术，基于可编程逻辑器件（CPLD）和单片机设计的低频信号源。
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。
DDS (direct digital synthesis) is a sort of frequency synthesis technique, which has advantages such as short frequency conversion time, high resolution in frequencies, programmability and so on.
直接数字频率合成(DDS)技术是目前广为应用的一项频率合成技术，它具有频率转换时间短、频率分辨率高、可编程等特点。
The principle of digital T/R module based on direct digital synthesis (DDS) technology is proposed, and the experiment results on the digital T/R module are given in this paper.
简要介绍了基于直接数字合成（DDS）技术的数字T/R组件的基本原理，对基于DDS的相控阵数字发射组件进行了实验研究，文章给出了实验结果，并进行了分析。
Direct Digital frequency synthesis (DDS) technology has always been the hotspot of study on frequency synthesis technology, since it was introduced in 1971 firstly.
自1971年第一次被引入以来，直接数字频率合成(DDS)技术一直是频率合成技术研究的热点。
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。
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；
MMW high resolution radar range profile two-step stretch processing method direct digital synthesis (DDS).
标 签 毫米波高分辨雷达距离像双脉冲伸缩处理直接数字合成（DDS）。
This paper briefly introduces the basic principles and the performance of DDS. Then it mainly describes how to use AD9851 chip to design a direct digital synthesis frequency source with high accuracy.
首先简要介绍DDS的工作原理及其性能，然后阐述如何利用AD985 1芯片设计一个高精度直接数字式合成频率源。
The direct digital synthesis (DDS) is adopted to generate the pseudo-random code clock having high precision and stability.
利用直接频率合成技术产生高精度、高稳定度的扩频伪码时钟。
Three Direct Digital Synthesis (DDS) chips, AD9832, are used in the design of a balanced coil intelligent metal detector.
在平衡线圈式智能金属探测器的设计中，使用了三片直接数字合成(DDS)芯片ad9832。
The digitized FM system is actually a Direct Digital Synthesis (DDS) system that the frequency of the output is controllable.
该方案实际上是一个输出频率受控的直接数字频率合成(DDS)系统。
The fundamental principle of direct digital synthesis (DDS) is introduced in this paper. Based on signal analysis, the ideal output spectrum characteristic of DDS is analyzed briefly.
对DDS基本原理进行了简要介绍，利用信号分析的方法对DDS理想输出进行频谱分析。
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。
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。
First of all, this thesis introduces the features of Direct Digital Frequency Synthesis (DDS) technique and gives a new structure of the Arbitrary Waveform Generators (AWG) base on DDS technology.
首先，本文对数字频率直接合成(DDS)技术的特点进行介绍，提出一种基于DDS技术的任意波形发生器(AWG)的改进结构。
Then the work theory, system structure, technology index, spectrum characteristic, merits and defects of Direct Digital Synthesis (DDS) are introduced mostly in the second chapter.
在第二章中，主要介绍直接数字频率合成器（DDS）的工作原理，对DDS的系统结构，工作原理，技术指标，频谱特性，优缺点进行了阐述。
With the appearance of DDS ASIC, Direct Digital Synthesis(DDS) technology is wide ranging applied.
目的：设计一个采用直接数字合成技术的电流模式多频阻抗激励源。
With the appearance of DDS ASIC, Direct Digital Synthesis(DDS) technology is wide ranging applied.
目的：设计一个采用直接数字合成技术的电流模式多频阻抗激励源。
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