The phase truncation causes spurious signals at the output of the DDFS.
相位截断误差在合成器输出端形成寄生调制信号。
This initial demodulator incorporates a digital mixer, DDFS and low-pass filter.
该解调器由数字混频器、数字频率合成器(DDFS)和低通滤波器构成。
Designs one kind of improvement subcarrier circuit structure, which used DDFS technology.
利用DDFS技术设计出一种改进的副载波产生电路结构。
Direct digital frequency synthesis (DDFS) is an advanced technique for frequency synthesis.
直接数字频率合成技术(DDFS)是一种先进的频率控制技术。
The paper discusses a prototype of direct digital frequency synthesizer(DDFS) controlled by microcomputer.
本文介绍一个微机可控直接数字频率合成器（DDFS）的实验样机。
Thus, software radio DDFS based on CORDIC algorithm can help to reduce chip area, power dissipation and cost.
所以CORDIC算法来实现软件无线电直接数字频率合成器有助于节省芯片面积、降低功耗、减少成本。
The design of direct digital frequency synthesizer(DDFS)in the way of local carrier demodulation is mainly introduced.
文章重点讨论了本地载波解调中的直接数字频率合成器（DDFS）模块的设计。
Offering direct digital frequency synthesis (DDFS) based on the frequency -phase to achieve the following sampling clock.
提出基于频相的直接数字频率合成技术（DDFS）实现采样的跟随时钟。
Its character is that the DDFS is linked to a microcomputer bus through buffer driver to control frequency and phase. The necessary hardware and software are designed.
重点讨论了微机控制部分，其特点是把DDFS经缓冲驱动器直接挂到微机总线上，以实现频率与相位控制，设计了全部硬件和软件。
This paper introduces a design of Direct Digital Frequency Synthesis(DDFS) based on CPLD, and describes clearly the design method of a multi-function waveform generator using DDFS.
本文介绍了一种基于CPLD的直接数字频率合成（DDFS）的实现方法，详细阐述了采用此技术设计多功能信号发生器的方法。
This article firstly demonstrated the Formula of the signal generator, then give the overall diagram of system. We focuses on the signal modules of the composition of the DDFS chip AD9833.
本文首先对信号发生器的设计方案进行了论证，接着提出了系统的整体设计框图，重点论述了由DDFS芯片AD9833构成的信号发生模块的设计。
This article firstly demonstrated the Formula of the signal generator, then give the overall diagram of system. We focuses on the signal modules of the composition of the DDFS chip AD9833.
本文首先对信号发生器的设计方案进行了论证，接着提出了系统的整体设计框图，重点论述了由DDFS芯片AD9833构成的信号发生模块的设计。
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