锁相环频率合成器的实现及应用

摘要

介绍了锁相环频率合成器的构成模型及工作原理；结合其在矿井中频无线通信系统中的应用,提出了用单片机控制实现自动频道选择的方法.锁相环频率合成器的应用使得无线终端可在不同基站之间快速漫游切换,具有频率分辨率高、频率转换时间短、转换时信号相位连续等优点.%The paper described composition model and working principle of PLL frequency synthesizer,and proposed method of automatic channel selection achieved by MCU control combined with its application in intermediate frequency wireless communication system in mine.The application of PLL frequency synthesizer allows wireless terminal to switch quickly in different base stations,and has advantages of high frequency resolution,short frequency conversion time,continuous phase during signal conversion and so on.