根据芯片的特点给出了程序的设计思路，包括AD9833初始化、写控制字、合成频率等。
Given the characteristics of this chip, this paper provides the procedure design methodology that includes AD9833 initiative, write control and synthesis frequency.
首先简要介绍DDS的工作原理及其性能，然后阐述如何利用AD985 1芯片设计一个高精度直接数字式合成频率源。
This paper briefly introduces the basic principles and the performance of DDS. Then it mainly describes how to use AD9851 chip to design a direct digital synthesis frequency source with high accuracy.
在锁相频率合成器中，由于压控灵敏度的变化，环路增益也将产生同样大小的变化，这就妨碍了环路特性的最佳化。
In frequency synthesis by phase lock, the loop gain will vary by the same amount due to this effect, which generally im - pedes optimization of loop performance.
DDS技术是一种先进的频率合成技术，其主要优点是易于程控，相位连续，输出频率稳定度高，分辨率高。
DDS is an advanced technique on frequency synthesis, whose primary advantages are controlling facility, continuous phase and fine frequency resolution.
频率合成器是射频收发机中非常重要的模块，是用于频率转换和频道选择的本地振荡源。
Frequency Synthesizer (FS) is a very important block, which is used in a wireless transceiver as a local oscillator for frequency translation and channel selection.
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.
DDS在雷达频率合成器，尤其是在相控阵雷达中，有广阔的应用前景。
The DDS can be applied widely to the synthesizer of radar, specially in the phased array radar.
讨论了应用模型化测量方法，使用模型平移产生精确相移，使用波形重构技术精确合成周期信号的频率。
The modeling measurement method is discussed, the precise phase moving is produced by using model moving, and the precise frequency is made by using the waveform synthesizing technique.
在信号的间断点附近产生的振荡，是因有限的傅立叶合成或频率缺失而造成的。
The ringing near a discontinuity in a signal that is caused by incomplete Fourier synthesis, or missing frequencies.
发射部分采用最先进的频率合成技术，发射频率稳定。
The emission part adopts the most advanced frequencies synthetic technique, having stable emission frequency.
本文提出了一种新的气象报警系统，此系统采用数字编码和镇相频率合成技术。
This paper presents a new weather alarm emitter adapted digital coding and phase-locked frequency synthesis techniques.
介绍了一种宽带数字式频率合成环路的设计思想，给出了原理电路。
This paper introduces the design thought of a wide band digital frequency synthesis loop. The principle circuit is given.
语音合成器型用户代理可能会改变合成参数，例如会相应地音量，音高以及频率等。
Speech synthesizer user agents may change the synthesis parameters, such as volume, pitch and rate accordingly.
在通信领域中，锁相环频率合成器起着越来越重要的角色。
In the field of communications, PLL synthesizers playing an increasingly important role.
通过修改基音频率和共振峰结构，该方法合成的语音有效地模拟了目标说话人的特性。
The modification of both pitch and formant structure contributed greatly to reproducing the target speaker's characteristics.
直接数字式频率合成(DDS)技术是一种全数字频率合成技术，其特殊的原理和结构使它具有多种调制能力。
Direct digital synthesis (DDS) is an all digital frequency synthesis technique. Because of its special theory and construction, it has many kinds of modulation capability.
直接数字频率合成(DDS)技术是目前广为应用的一项频率合成技术，它具有频率转换时间短、频率分辨率高、可编程等特点。
DDS (direct digital synthesis) is a sort of frequency synthesis technique, which has advantages such as short frequency conversion time, high resolution in frequencies, programmability and so on.
数字查表法合成周期信号是一种最常用的直接数字频率合成技术。
Digital look up table method for synthesizing periodic signals is the most popular technique for direct digital frequency synthesis.
频率合成器是一种频率稳定度较高的离散间隔型频率信号发生器，广泛应用在通信、雷达、仪器仪表及导航系统中。
The frequency synthesizer is a kind of discrete frequency singal generator with high stability, and it is widely used in communication, radar, apparatus and navigation system.
直接数字式频率合成技术(DDS)是一种先进的全数字频率合成技术，本文基于DDS的相位调制功能，给出了一种DDS数字移相器的设计方案。
Direct digital synthesis (DDS) is an advanced all digital frequency synthesis technology, based on the PM function of DDS, this paper gives the design scheme of a DDS digital phase shifter.
这种直接数字式频率合成技术(DDS)具有频率值转换速度快、频率值分辨率高、控制频率的相位值连续等优点。
The technology of DDS has many values, such as the speed of hopping frequency is very high, the resolving power of frequency is also high.
介绍了使用软件方法，在虚拟仪器模式下，用任意波发生器产生精确相移与合成任意频率的周期信号。
A method of digital phase moving and frequency synthesizing by using software technique is introduced, it is upon the arbitrary waveform generator, and in the virtual instrumentation mode.
直接数字频率合成技术(DDFS)是一种先进的频率控制技术。
Direct digital frequency synthesis (DDFS) is an advanced technique for frequency synthesis.
在利用直接数字式合成方法产生周期信号时，信号的频率分辨率和带宽直接受限于合成系统的工作频率和存储容量。
In the direct digital synthesis of periodic signals, the frequency resolutions and bands of the synthesized signals are limited by the working frequency and data capacity of the synthesizing system.
利用电力系统三相交流电压过零点和高速数字频率合成器解决了跳频系统中同步和快速频率合成的两个关键问题。
The zero-crossings of the AC voltage and digital frequency synthesizer are used in solving the two main problems in frequency hopping system-synchronization and fast frequency synthesizing.
直接数字频率合成(DDS)是一种新的频率合成方法，具有频率分辨率高、切换速度快等优点。
The direct digital frequency synthesis (DDS) is a kind of new frequency synthesis method. It has high frequency resolution, fast frequency switching speed, etc.
直接数字合成是先进的频率合成技术，给出了直接数字合成器的设计方法和实现技术。
Direct digital synthesis is a kind of advanced technique on frequency synthesis, in this paper, the design and realized technique of DDS is given.
直接数字合成是先进的频率合成技术，给出了直接数字合成器的设计方法和实现技术。
Direct digital synthesis is a kind of advanced technique on frequency synthesis, in this paper, the design and realized technique of DDS is given.
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