基于双锁相环路的RF调制解调器设计  

Design of RF Modem Based on Double Phase Lock Loop

作　　者：徐宏宇[1] 贾亮[1] 孙延鹏[1] 

机构地区：[1]沈阳航空工业学院,辽宁沈阳110034

出　　处：《电视技术》2004年第11期58-60,共3页Video Engineering

摘　　要：提示了CATV系统中采用锁相环路进行RF调制解调器电路设计方法,以及克服PLL锁定时间与调制速率之间相矛盾的解决方案,同时对嵌入的PIC单片机软件的流程作了介绍。设计保证了足够的输出电平和带外抑制,消除了对电视信号传输的干扰。This paper briefly introduces how to adopt PLL to design RF modem in CATV system. A method is proposed to solve the problem of the data rate limited by the PLL lock time, and the flow chart of PIC microcontroller is presented at the sane time. The design ensures enough output level and out-band suppression to eliminate disturbing TV signal transmission.

关 键 词：调制解调 锁相环 PIC单片机 

分 类 号：TN941.4[电子电信—信号与信息处理]