摘要
提出了一种可实现快速跳频的频率合成器-直接数字式频率合成器(DDS),它具有与密集的通道间隔相适应的极快的频率转换速度、高精确频率分辨力、低相位噪声和高频谱纯度等重要特点,可用作扩频通信、遥测遥控及仪器仪表等系统的理想信号源.同时,提出了以大规模集成芯片AD9955为主要部件的直接数字式频率合成器的设计方案,并研究了以DDS为参考源的锁相式频率合成器设计,取得良好效果.
Introduce a new fast hopping frequency synthesizer- the direct digital synthesizer, which has advantages in many applications due to its fast fequendcy changes, fine resolution and low phase noise. It can be applied in communications in, instrumentation and military systems. In the meantime, design of a direct digital synthesizer utilizing AD9955 is presented and the design of DDS - driven, phase-locked loop frequency synthesizers is studied.
出处
《北京理工大学学报》
EI
CAS
CSCD
1995年第2期143-146,共4页
Transactions of Beijing Institute of Technology
基金
国家"八五"重点科研项目
关键词
直接数字式
频率合成器
锁相式
数字取样技术
direct digital frequency synthesizers
phase locked loop frequency synthesizers/digital sample technique