... speech filing system 语音文件生成系统 spurious frequency spectrum 杂散频率谱 step function solution 阶跃函数解 ...
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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).
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。
The hardware constitution of a low phase noise frequency synthesizer using AD9854 and the measured performances of system phase noise and spurious spectrum are presented.
给出了采用AD985 4芯片构成的低相噪频率综合源的硬件组成以及系统实测的相位噪声、杂散技术指标。
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