摘要
本文介绍一种低杂散低相噪快速捷变频率合成器的实现途径 ,该合成器采用直接数字频率合成芯片 (AD985 2 )加倍频的方案。为提高频率捷变速度和输出频率精度 ,采用TI公司的TMS32 0C31作为控制电路 ,捷变频时间小于 2 0 0ns ,相位噪声小于 - 1 2 4dBc/Hz/ 1kHz .
The paper presents a fast agile frequency synthesizer of low spurious, low phase noise. The scheme adopted by the synthesizer is a DDS chip(AD9852) at double frequency. The control circuit uses TMS320C31 of TI Inc. for the sake of swift frequency change and output frequency precision. The time of frequency agile is less than 200 ns, and its phase noise is less than -124dBc/Hz/1kHz.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2003年第2期277-279,共3页
Acta Armamentarii
