The technology of direct digital frequency synthesis ( DDS ) , is a new typed synthesizer technology and signal frequency methods.

A method of generating radar multi-target phase-coherence echo based on DDS is discussed.

介绍了一种基于DDS的雷达 多目标 相参回波信号生成方法.

Direct Digital Frequency Synthesis ( DDS ) technology is realized on complex programmable logical component ( CPLD ) with hardware description language.

在复杂可编程逻辑器件 ( CPLD ) 上,用硬件语言实现了直接数字频率合成 ( DDS ) 技术.

Clear AFM images were ( obtained ) from PbZr _ ( 0.90 ) Ti _ ( 0.10 ) O _ 3-Fe _ ( 0.003 ) nano powder sample prepared by DDS method.

采用DDS法制备PbZr0.90Ti0.10O3-Fe0.003 ( PZT -Fe ) 纳米粉体样品,得到了清晰的AFM图像.

PLL frequency synthesizer with DDS reference will adapt to local oscillator of modern radio.

采用DDS输出作为参考的PLL频率合成器非常适合用做现代电台的本振.

Impulse test. This procedure for the AD 9850 ( DDS ) Direct Digital Frequency Synthesizer C language source code.

脉冲发生测试. 此程序为AD9850 ( DDS ) 直接数字频率合成器C语言源码.

DDS-11 A digital conductivity instrument for laboratory measurements of conductivity of liquids.

DDS-11A型数字电导仪适用于实验室测量液体的电导率.

The hardware configuration of using DDS chip AD 9956 to realize the linear modulation function is introduced.

介绍了一种基于DDS芯片AD9956实现线性调频功能的硬件实现方法.

Deposit-dip-spin ( DDS ) coating method, a composite nano-powder sample preparation method for atomic force microscope ( AFM ) measurement is introduced.

介绍了一种改进旋涂法 —— DDS 涂膜法 ( Deposit-Dip-Spin-coating), 主要用来制备纳米粉体原子力显微镜 ( AFM ) 分析样品.

DDS-1 type m ulti-function electronic laboratory case can meet this requirement.

DDS - 1型多功能电子实验箱即可满足这方面的需要.

Through the DDS CMOS chip AD 9851 , the system produces a 64 points sampling signal.

通过DDS芯片AD9851来产生相对于输入信号64倍频的高精度采样信号.

The basic theories of the frequency synthesis , PLL , DDS, DDS + PLL are introduced first in this paper.

本文首先介绍了关于频率合成、锁相环频率合成、DDS频率 合成 、 DDS+PLL频率合成等的基本理论.

The transmitterof DHF uses DDS to synthesize frequency.

发射机采用直接数字频率合成器(DDS)生成频率,具有精度高、频率跳变速度快的特点.

This article describes the design of a linear sweeping frequency signal generator using DDS technology.

本文介绍了利用DDS来产生线性扫频信号的射频信号发生单元的设计.

Microbiological degradation is an effective and environment-friendly method to eliminate DDT pollution.

微生物降解是一种有效的环境友好型去除DDT污染的手段.

The house is regularly spraying with DDT.

房屋是定期用DDT喷洒.

Led to the ban of DDT because of its highly toxic nature.

导致禁用DDT,因为它有很高的毒性.

The insects can be exterminated by spraying DDT.

可以用喷撒滴滴涕的方法大量杀死这种昆虫.

DDT sprayed into the air kills mosquitoes and other insect pests.

喷射到空气中的ddt能杀死蚊子和其他有害昆虫.

The underneath cargo is'stained contaminated the DDT dust.

以下货物被DDT原粉灰尘污染.

In 1873, the chemical DDT was first synthesized.

1873年, 化学物质滴滴涕(DDT)首次合成.