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1、程晋然-超外差调幅收音机-毕业论文本科毕业论文（设计）题目：超外差调幅收音机姓名：学号：专业：院系：电子通信工程学院指导老师：钟玲玲实习单位：安徽新华学院完成时间：2012年4月18日安徽新华学院教务处制摘要电子设计自动化技术已渗透到电子系统和专用集成电路设计的各个环节，个中软件应用到电子设计，使电路的设计，调整和改进更加高效便捷。详细分析了超外差式调幅收音机电路的工作原理及其组装和调试，现在的S66E将原来的插座改为立体声耳机插座，电路原理图未变，步线有所调整。更改后的收音机灵敏度更高、声音更洪亮、用途更广泛，适合MP3、单放机等机
2、型所使用的耳机。散件为3V低压金硅管六管超外差式收音机，具有安装调试方便、工作稳定、生硬洪亮、耗电省等优点。它由输入回路高放混频级、一级中放、二级中放、前置低放兼检波级、低放级和功放级等部分组成，接受频率范围为535KHZ~1605KHZ的中波段。关键词：混频级；检波级；低压金硅管IABSTRACTElectronicdesignautomationtechnologyhasinfiltratedintoelectronicsystemsandapplication-specificintegratedcircuitdesignina
3、llaspects,inasoftwareapplicationtotheelectronicdesignandsimulation,circuitdesign,adjustandimprovemoreefficientconvenient.AsimpleanalysisofthesuperheterodyneAMradiocircuitandtheprincipleofassemblyanddebugging.NowtheS66Etheoriginalstereoheadphonesockettosocket,circuitsche
4、maticsunchanged,infantrylineadjustments.Afterthechangeofradiosensitivityhigher,soundmoreresonant,moreextensiveuseforMP3,playermodels,suchasbyusingheadphones.Partsof3Vlow-voltageofthesiliconsixsuperheterodyneradio,withtheinstallationdebuggingconvenience,thestability,rigi
5、dity,whoseadvantagesinpowerconsumption.Itistheimportationofhigh-levelradioactivemixercircuitlevel,inarelease,thetwo-in,pre-releaseofthedetectionoflow-level,low-levelandonthehigh-levelandothercomponents,toacceptthefrequencyrangeof535KHZ~1605KHZintheband.KEYWORDS：Mixinghi
6、gh-level；low-leveldetection；Low-voltageofthesiliconII目录1研究背景....................................................................................................................12无线电发射与接收的基本原理...............................................................................
7、.22.1无线电波.............................................................................................................22.2无线电波的传播方式.........................................................................................22.3无线电发射与接收的基本原理.................................
8、........................................22.4调幅波的概念............................................................
