1.A realization technique of high speed arbitrary wave generator based on dual DDS(direct digital frequency synthesizer) is presented.
提出了一种基于双DDS(Direct Digital Frequency Synthesizer)的高速任意波发生器实现技术。
2.Our work is a successful application of the voice synthesizer HD38880, which is specially designed for Japanese, into Chinese. In this paper, a Chinese synthesis device which consists of voice synthesizer HD38380, parametric EPROM and some other 1C, is introduced.
本文介绍的汉语合成器是用合成芯片 HD38880以及参数EPROM 等少量硬件制成,合成声音清晰自然,且具有体积小?构简单的特点,在仪器仪表语音智能化、计算机自动应答等方面都可以应用。
3.MIDI’s original purpose as to allow a musician to control several synthesizers from one keyboard rather than connecting a number of keyboard-equipped synthesizers，to produce the multilayered sound. The MIDI standard provides for 16 channels. You can assign each channel to a specific synthesizer or synthesizer voice.
MIDI原本的目的并不是为了连接许多装备了键盘的合成器来产生多层次的声音,而是为了使音乐家能够用一个键盘控制几个合成器进行演奏。MIDI标准提供16个声道，你可以为每一个声道设置一个特别的合成器或合成器声音。
4.The Direct Digital Frequency Synthesizer is a kind of fully digitized frequency synthesizer, which consists of the phase accumulator, the sine look-up table, the digital to analog converter and the low band filter. It is of high frequency resolution, fast frequency switching speed, low phase noise, the ability to switch frequencies while maintaining constant phase, and the ability to producing arbitrary waveforms.
直接数字频率合成器(DDS)是一种全数字化的频率合成器，由相位累加器、波形ROM、D／A转换器和低通滤波器构成，DDS技术具有频率分辨率高、频率切换速度快、频率切换时相位连续、输出相位噪声低和可以产生任意波形等优点。
5.In the method,DRO PLS is applied to be local oscillator to assure low phase noise performance and synthesizer in L band to assure high agile synthesizer speed.
其中，DRO PLS保证低相位噪声性能； L波段捷变频频综保证捷变频功能。
6.Through the research of direct digital synthesizer (DDS) used as a divider in phase lock loop (PLL), a frequency synthesizer with small frequency resolution ratio and high purity frequency spectrum can be realized.
摘要通过对直接数字合成器在锁相环路中作为分频器应用的研究，使频率合成器可以在实现超细频率分辨率的同时达到高的频谱纯度。
7.The timing circuit employed a high speed procession (DSP) TMS320LF2407 as the central control device. A high performance SB3336A/E 3.5G integer-N PLL frequency synthesizer incorporated with operational amplifier and voltage controlled oscillator to form a 1.2G frequency synthesizer. The timing precision can be up to 0.84ns and the corresponding ranging precision is 0.125m.
本电路以高速数字信号处理器(DSP)TFMS320LF2407为核心控制部件,用SB3236A/E高性能2.2G整数-N PLL频率合成器,配以运放、压控振荡器等器件,组成1.2GHz频率合成器,测时精度可达到0.84ns,测距精度可达到0.125m。
8.Based on this method, we design a low spurious and high resolution frequency synthesizer ranged from 92.1MHz to 120.499MHz with AD9850. The synthesizer demonstrated spurious level below -65 dBc with frequency step of 100Hz.
我们采用AD9850实现了92.1～120.499MHz的高分辨率低杂散跳频频综。 在步进100Hz的条件下,杂散电平为-65dBc。
9.CORDIC-Based Direct Digital Frequency Synthesizer
基于CORDIC算法的直接数字频率合成器
10.Synthesizer Design for 5 GHz WLAN
应用于5GHz无线局域网的频率合成器设计
