具有快速锁定时间的新型低相噪频率合成技术  

New Frequency Synthesis Technology with Fast Lock Time and Low Phase Noise

作　　者：魏福立[1] 张华鹏[2] 

机构地区：[1]中国电子科技集团公司第十三研究所,石家庄050051 [2]第二炮兵工程学院指挥自动化系,西安710025

出　　处：《半导体技术》2006年第5期321-324,333,共5页Semiconductor Technology

摘　　要：介绍了一种新型频率合成器的基本原理和方法,该结构利用常规合成器中存在而被忽略的有用信息而改进的电路结构,捕捉速度快(<20ms)、相位噪声低,与常规锁相频率合成器相比,相位噪声减小约25dB,可为现代通信提供纯净的频谱、较低的辐射和高质量的信息传送,大大提高了无线通信的质量和性能。A new frequency synthesizer and its basic principle and method were introduced. This structure used the information available in the normal phase lock loop（PLL） that was ignored in traditional systems. The improved PLL has the great advantages of faster capture speed （〈 20 ms）and lower phase noise （reduced more than 25dB）.The pure frequency spectrum and lower radiation and high quality information are provided for modern communicate. The performance quality of the radiocommunication can be improved greatly.

关 键 词：锁相频率合成 鉴相器 瞬时相位 锁定速度 

分 类 号：TN773[电子电信—电路与系统]