ADF4111在锁相式频率源中的应用  

Application of ADF4111 in PLL Frequency Synthesizer

作　　者：黄小东[1] 习友宝[1] 

机构地区：[1]电子科技大学电子工程学院,成都611731

出　　处：《电子器件》2012年第6期751-754,共4页Chinese Journal of Electron Devices

摘　　要：为了得到射频接收机中稳定的频率源,设计了一种以ADF4111为核心的锁相式频率源,采用单片机进行控制。介绍了锁相环芯片ADF4111的基本结构、工作原理及其编程控制过程,同时介绍了环路滤波器和压控振荡器的设计。测试表明该频率源的工作频率为754 MHz～764MHz,频率步进为100kHz,相位噪声优于-90dBc/Hz@10kHz、-110 dBc/Hz@100kHz,输出功率为6dBm。To get stahle frequency synthesizer used in RF receiver, PLL frequency synthesizer based on ADF4111 is presented,whicll is controlled by MCU. ADF41 l l＇s basic structure and operation principle and its programming process are introduced. At the same time,design of loop filter and VCO is also be introduced. Test results show that its frequency range is 754 MHz- 764 MHz,frequency step is 100 kHz,phase noise is better than -90 dBc/Hz@ 10 kHz,-110 dBc/Hz@ 100 kHz,output power is 6 dBm.

关 键 词：频率源 ADF4111 锁相环 环路滤波器 压控振荡器 

分 类 号：TN74[电子电信—电路与系统]