（高频电路设计与制作）实训论文说明书题目：调频接收机院（系）：专业：电子信息工程学生姓名：学号：指导教师：2011年12月28日桂林电子科技大学实训（论文）报告用纸第1页共2页摘要收音机的发明人类自从发现能利用电波传递信息以来，就不断研究出不同的方法来增加通信的可靠性、通信的距离、设备的微型化、省电化、轻巧化等。接收信息所用的接收机，俗称收音机。本设计主要利用集成电路CXA1691BM搭接成接收机电路，CXA1691BM是一个单芯片FM/AM收音IC专为无线收录机。由索尼公司主生产。使用它来制作收音机可以实现通信的可靠性、通信的距离、设备的微型化、省电化、轻巧化等。CXA1691BM是一块适用于单声道便携式或手掌式超小型调频收音机的专用电路，它采用先进的工艺制造，采用SOP-28封装，尺寸小；应用时外围元件少，成本低。其外接变容二极管作为调谐器件，在外围元件的数量、尺寸及成本上变得很重要时，可优先选用该电路。由CXA1691BM构成FM接收机具有电路简单、调试方便、性能稳定和价格低廉等优点。关键词：集成块CXA1691BM；调频，变容二极管桂林电子科技大学实训（论文）报告用纸第2页共2页AbstractTheinventionofradiocanusehumansincethediscoveryofradiotransmissionofinformation,willcontinuetoworkoutadifferentapproachtoincreasethereliabilityofcommunication,communicationdistance,equipmentminiaturization,powersaving,lightetc..Receiverforreceivinginformation,commonlyknownastheradio.ThisdesignmainlyusesintegratedcircuitCXA1691BMoverlappedintoareceivercircuit,CXA1691BMisasuitablemonoportableorpalmFMradioforthecircuit,itadoptstheadvancedmanufacturingtechnology,usingSOP-28package,smallsize;whenappliedtolessperipheralelements,lowcost.Anexternalvariablecapacitancediodeasatuningdevice,intheperipheralcomponentsofthenumber,sizeandcostbecomesveryimportant,butpreferredthecircuit.ConsistingofCXA1691BMFMreceiverhastheadvantagesofsimplecircuit,convenientadjustment,stableperformanceandlowprice.Keywords：IntegratedcircuitCXA1691BM;FM;Variablecapacitancediode桂林电子科技大学实训（论文）报告用纸第1页共1页目录引言.................................................................................................................................11无线电接收概论.....................................................................................................11.1无线电广播与接收概述.............................................................................................................11.2无线电广播系统组成及基本过程........................................................................................12收音芯片CXA1691BM...........................................................................................22.1CXA1691BM芯片特点...................................................................................................................22.2CXA1691BM芯片功能............................................................................................................................22.3CXA1691BM芯片异定值、温度与工作条件........................................................................33.调频接收机的工作原理.....................................................................................33.1调频接收机的组成.......................................................................................................................33.2限幅电路的作用.............................................................................................................................43.3鉴频器的工作原理...........................................................................
