LPC917在短波调制解调器中的应用  

Application of LPC917 in Shortwave Modem

作　　者：刘根据[1] 何二朝[2] 薛娓娓[1] 王海军[1] 李音[1] 

机构地区：[1]延安大学西安创新学院,陕西西安710100 [2]延安大学信息学院,陕西延安716000

出　　处：《现代电子技术》2008年第22期178-180,共3页Modern Electronics Technique

摘　　要：分析短波调制解调器中使用的XR2206的工作方式,指出其生成的频率不稳定的原因。这里用LPC917替代原系统调制端的XR2206和解调端的同步积分电路,详细介绍完成4FSK和同步积分运算的方法和过程,给出程序流程图和主要控制信号的时序示意图,并指出LPC917与XR2206相比具有成本低、性能高及可编程等方面的优势。经实践证明,本方案完全可行。This paper analyzes the working of XR2206 used before in shortwave, and points out the cause of instability of frequency derived by it. Using LPC917 replaces XR2206 which is located in modulation end and synchronous integrated circuit in demodulation end, introduces the method and process of completing the 4FSK and the synchronous integral operation, it gives the program flow chart and the main control signal timing diagram,and indicates the advantages of LPC917 compared with XR2206 in aspects of low cost, high performance and programmability and so on. Proved by the practice, this plan is feasible.

关 键 词：XR2206 LPC917 4FSK 同步积分 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构] TN919.72[自动化与计算机技术—计算机科学与技术]