1) DDS-Tech
直接数字频率合成技术(DDS技术)
2) Direct Digital Frequency Synthesize(DDS)
直接数字频率合成技术(DDS)
3) DDS
直接数字频率合成技术
1.
With VHDL(VHSIC Hardware Description Language) the direct digital frequency synthesize(DDS) and many control functi.
电源模块提供FPGA的5V工作电压和DAC芯片的±12V工作电压;用VHDL语言实现直接数字频率合成技术(DDS),实现波形选择等多种控制功能;利用FPGA内嵌32位NoisII软核设计了一种键盘控制LCD显示的处理器;D/A转换及功率放大模块主要采用高速宽带运放。
2.
The key technology and implementation method are discussed,with emphasis on the technology of digital frequency synthesizer,the TH/FH control and the DDS.
对其中的关键技术和实现方式进行了论述,着重分析了数字频率合成器和跳频跳时控制器及其中的直接数字频率合成技术,讨论了变频器设计中频率组合干扰问题,给出了在工程中实用的设计方法。
4) direct digital synthesis
直接数字频率合成技术
1.
The system designed to construct a waveform generator was based on direct digital synthesis, with LPC2132 and AD9852 as the key, complemented by necessary analog circuit.
基于直接数字频率合成技术(DDS),以LPC2132单片机和AD9852芯片为核心,并辅以外围模拟电路,设计了信号发生器。
2.
The mostly task is to study how to use the Direct Digital Synthesis technology to design and realize the high speed digital mid-frequency modulator, and give the answers of the problems which emerge in the development.
讨论了直接式频率技术、锁相式频率合成技术、数字式频率合成技术、直接数字频率合成技术等几种基本频率合成技术,给出的衡量频率合成技术的各种性能指标,并对全数字频率合成技术作了较详细的讨论。
5) direct digital frequency synthesis
直接数字频率合成(DDS)
1.
The signal source of the magnetic field is based on the AT89S52 MCU and DDS chip AD9854,which is developed with the technique of Direct Digital frequency Synthesis(DDS).
阐述了胶囊微机器人的驱动原理与旋转磁场的产生方法,并结合直接数字频率合成(DDS)技术,开发了以单片机AT89S52和DDS芯片AD9854为核心的旋转磁场驱动信号源。
6) DDS
直接数字频率合成(DDS)
1.
Our design that multifunctional waveform generator based on DDS is just according to the defects of the signal generators used at present.
直接数字频率合成(DDS)技术是于二十世纪七十年代提出的一种新的频率合成技术。
2.
PLL,DDS,FPGA are discussed in detail,PLL and DDS frequency synthesizer are combined to assure high performance:broad bandwidth,high frequency-agile rate,low spurs and low phase noise,and the integrated module is designed and produced,the size is 136×130×18 mm.
以锁相环(PLL)、直接数字频率合成(DDS)、现场可编程逻辑器件(FPGA)等为主要的研究对象,对PLL和DDS结合起来实现宽带、捷变频、低杂散和低相位噪声的上变频方案进行了详细描述。
3.
DDS and digital phrase-lock technology have been applied in FPGA to improve the accuracy of frequency tracking.
采用高精度的直接数字频率合成(DDS)和数字锁相环技术,实现了高频率跟踪精度。
补充资料:FITD技术
FITD技术
foot-in-the-door technique
fl丁D技术(Foot一in一th。一door teehnique)见“敬门术”。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条