通信工程系电子综合实践课程设计FM/AM收音机原理与制作学生姓名学号所在系通信工程专业名称计算机通信班级指导教师二○一二年六月1目录目录........................................................................................................................................1前言..........................................................................................................................................21通信的基本概念..................................................................................................................21.1通信的定义...............................................................................................................21.2几个名词：信息、消息、信号.................................................................................22通信系统..............................................................................................................................32.1通信系统的组成................................................................................................................32.2通信系统的分类.......................................................................................................33无线电波信号......................................................................................................................53.1无线电波...................................................................................................................53.2无线电发射与接收基本原理....................................................................................63.3无线电波的发射........................................................................................................64调幅收音机..........................................................................................................................74.1收音机原理图..............................................................................................................74.2超外差式收音机........................................................................................................95输入调谐回路..................................................................................................................105.1输入调谐回路的作用与要求.............................................................................105.2输入调谐回路的组成与工作原理....................................................................116变频电路............................................................................................................................126.1变频电路的基本组成.............................................................................................126.2变频原理.................................................................................................................127中频放大级(是超外差式收音机的重要组成部分)........................................................137.1中频放大级的作用.................................................................................................137.2对中频放大级的基本要求.....................................................................................138检波电路............................................................................................................................148.1检波电路的作用...................................................................................................
