本文叙述了一个用微机控制的锁相环频率合成数字调谐系统的原理和设计。
In this paper the principle and design of a microcomputer-controlled PLL frequency synthesis digit tuning system is discussed.
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。
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.
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。
DDS and digital phrase-lock technology have been applied in FPGA to improve the accuracy of frequency tracking.
本文分析了数字锁相环路的寄生频偏，它是现代通讯系统中频率合成器的重要指标之一。
This paper gives an analysis of parasitic frequency deviation in the digital phase locked loop, which is one of the important specifications of modern communication systems.
针对一个汽车音响收音数字调谐系统的实例，介绍了一种广播用双波段锁相环频率合成芯片的设计方法。
The phase locked loop (PLL) frequency synthesizer for digital tuning system(DTS), which is used in DTS of car radio receiver, is presented.
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。
Firstly the basic theory of DDS and PLL, as well as their characteristics and phase noise properties have been analyzed detailedly.
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