以上对合成器vco工作的基本过程进行了描述。
首先分析直接数字频率合成器(DDS)的基本结构、工作原理、杂散来源、输出频谱特性。
At first, this paper described the basic structure, working principle, sources of spurious signals and characteristics of output spectrum, of direct digital frequency synthesizer (DDS).
文章介绍了直接数字频率合成器(DDS)的基本工作原理，同时对其杂散进行了分析。
The paper introduced the working principle of the direct digital frequency synthesizer (DDS) and its spurious analysis is performed.
本文说明了DK - 3型频率合成器的基本原理，介绍了其环路参数设计，最后给出实验结果。
The principle of type DK-3 frequency synthesizer is briefly described and the design of loop parameters is introduced. Finally, the experiment results are given.
介绍了直接数字频率合成器的基本组成及设计原理，并对各组成部分进行了理论分析，给出了基于FPGA的具体设计方 案及实现方法。
The structure and principles of Direct Digital Frequency Synthesizer is introduced, and each constituent is theoretically analyzed, and also a detailed design based on FPGA is given.
介绍了直接数字频率合成器的基本组成及设计原理，并对各组成部分进行了理论分析，给出了基于FPGA的具体设计方 案及实现方法。
The structure and principles of Direct Digital Frequency Synthesizer is introduced, and each constituent is theoretically analyzed, and also a detailed design based on FPGA is given.
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