This paper introduces the theory of the phase-locked loop (PLL) and the direct digital synthesis (DDS), a method to improve the precision of DDS and reduce its phase truncation error is also given.
介绍了锁相环(PLL)技术和直接数字式频率合成(DDS)技术的基本工作原理，给出了一种提高DDS输出频率精度及减小其相位截断误差的方法。
DDS hybrid PLL can take good advantage of both their merit, have become an important area of frequency synthesis.
PLL混合频率合成技术能综合两者的优点，已成为现今频率合成领域的重要研究方向。
It analyzes the transient effect of frequency step of DDS on the PLL output response, and puts forward a corresponding improving way.
分析了DDS频率阶跃对于PLL输出响应的瞬态影响，并且给出了相应的改善方法。
DDS-driven PLL frequency synthesizer architecture is given in this paper.
给出了一种基于DDS驱动PLL的频率综合器结构。
In the ultra high frequency system, the frequency compounder section of the transmitting frequency is operated with DDS/PLL technology.
在甚高频系统中，射频的的频率合成器部分采用DDS/PLL技术。
Firstly the basic theory of DDS and PLL, as well as their characteristics and phase noise properties have been analyzed detailedly.
首先对直接数字频率合成技术(DDS)和锁相频率合成技术(PLL)的基本原理、特点及相噪特性作了详细的分析。
Firstly the basic theory of DDS and PLL, as well as their characteristics and phase noise properties have been analyzed detailedly.
首先对直接数字频率合成技术(DDS)和锁相频率合成技术(PLL)的基本原理、特点及相噪特性作了详细的分析。
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