查询词典 DDS

In this paper, a kind of reconfigurable multi-channel DDS signal generator based on FPGA is introduced.

介绍了一种基于FPGA芯片实现的可重构DDS信号发生器。

This is a DDS-based sinusoidal frequency generator of the design and implementation and application.

详细说明：这是基于DDS的正弦频率发生器的设计和实现以及应用。

Based on the spectrum analysis of DDS, this paper introduces some methods of Spur Reduction.

同时以DDS的频谱分析为基础，给出了几种改善杂散的方法。

My own use VHDL to achieve series dds, able sine, square, triangle wave.

我自己用vhdl实现编的dds，能实现正弦波，方波，三角波。

The design of the sweep signal generator based on DDS is carried through mainly in the paper. And the generator has two ways in the frequency output: sweep and dotted. It also possesses other functions, like frequency measurement and sweep speed control.

本文重点进行了基于DDS的扫频信号发生器的设计，该发生器具有扫频和点频两种频率输出方式，还具有测频、扫速控制等功能。

In this paper, the design scheme of an agile microwave frequency synthesizer which adopts DDS+PLL is discussed.

本文讨论采用DDS+PLL的捷变微波频率合成器的设计方案。

But when the molar ratio of TEOS:DDS is 1:1.25, the result materials are particles with different sizes.

当TEOS∶DDS=0.5时，得到的产物是相互粘连的、表面分布不均匀的体系。

Another important result was that the reactive orders of both ammonia and water were increased to different extent for TEOS and DDS in mixed systems.

同时， DDS在双前驱体中比单前驱体中的水解速率常数有很大程度的减少。

In vivo, the DDS cylinders were implanted into the defects in left tibial tubercle of New Zealand rabbits.

制作新西兰大白兔左胫骨结节骨缺损模型，在缺损处植入含20mg环丙沙星的DDS，进行体内释放实验。

This paper introduces the research and implementation of all-purpose high-speed test adapter for ADC. The main contents includes two methods about how to testing the static parameters and dynamic parameters for ADC. The servo loop method is proposed to static parameters, by using the test principle of high-precision voltage source, high-precision voltage meter and digital comparator. To dynamic parameters, the DDS chip of AD9851 is used to generate sine waves with high signal to noise ratio, then the high-s...

servo loop ； FFT ；本文介绍了关于ADC高速通用测试适配器的研究和实现，主要介绍了测试ADC芯片静态参数和动态参数两种方法，针对静态参数，提出了用伺服环的方法，采用高精度电压源，高精度电压表和数字比较器的测试原理；针对动态参数，提出了用DDS芯片AD9851产生高信噪比的正弦波，采用高速采样模块采集数据，最后用FFT算法对采集的数据进行处理。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。