1、

This paper mainly introduces a solution about the last frequency transition circuit of Rb atomy frequency standard, which is based on FPGA+ DDS technology.

对铷频标电路部分最终的频率变换级提出了一种基于FPGA+DDS的解决方案。

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2、

To increase the DDS spectrum purity, the non-idea SCMP was optimized.

为进一步提高DDS的频谱纯度,可以对非理想SCMF误差进行优化。

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3、

The paper discusses on DDS spectrum purity improvement, and gives the circuit scheme.

对如何提高DDS输出频谱纯度进行了探讨,并给出电路解决方案。

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4、

The design of DDS and Periods Synthesizer technology possesses some characteristics including high performance, high performance-cost ratio and simple circuit structure, and so on. These technologies can be easily embedded into the control system of EIS.

采用该方法设计的EIS激励源可以很容易地嵌入到EIS控制系统中,而不用专用DDS芯片,具有高性能、高性价比、电路结构简单等特点。

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5、

Direct Digital Frequency Synthesis ( DDS ) technique is introduced and its spurious error is mainly studied.

介绍了直接数字频率 合成技术 以及分析其杂散误差,对相位截断误差和幅度量化误差进行了傅立叶级数分析研究.

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6、

A frequency sweeper with DDS chip AD 9850 and a Philips microcontroller P 89 C 51 RC 2 was designed.

DDS扫频仪以菲力浦单片机P89C51RC2控制DDS芯片AD9850,用PC机显示扫频结果.

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7、

Applications of digital system design about LPM database 、 divider and DDS frequency synthesizer in the MAX + PLUSare introduced.

介绍了MAX+PLUS 中LPM库车 RAM、除法器和DDS频率合成器上进行数字系统设计的应用.

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