家用音响设计制作论文(经典)

编号：毕业设计(论文)说明书题目：家用音响设计、制作院（系）：专业：学生姓名：学号：指导教师：职称：题目类型：理论研究实验研究工程设计工程技术研究软件开发√2006年06月05日摘要随着人们生活水平的进一步提高，高保真音响设备和家庭影院系统已经逐步进入了人们的家庭，人们对娱乐消费类电子产品的需求欲望亦日渐高涨，建立适合自己口味的高保真梦幻组合和家庭影院也已经不再是梦想。本论文将以性价比为导向，兼顾基本的高保真的技术指标，讨论了适合一般家用的多媒体高保真功放。论文由浅至深，结合图示介绍了家用音响的组成和相关知识，以及整个功放的工作过程的细节，内容涉及输入前置放大电路、音调控制和音色处理电路、功率放大电路、电源电路。同时还对各个主要芯片自身的特点及如何去设计这个系统来满足一定的技术指标进行了讲解。论文尽可能通俗地来介绍家用音响，让大家能从中学到基本的家用组合音响的知识的同时，还能学会如何制作高保真音频放大器以及对音响器材选购作出正确的选择。在技术层面上，系统主要是采用集成芯片来完成的，这个设计中用NS（NationalSemiconductor）公司带有3D环绕声场处理功能的LM4610N做音调芯片，通过改变直流控制电压来实现音调控制；前置放大使用了曾经的“运放之皇”NE5532，典型的增益为20dB；后级功率放大部分用的也是NS公司的一款经典芯片――LM1875芯片，每声道两片，驳接成桥式推挽BTL电路,以取得更大的功率以及更好的音效；此外此音响还带有无信号或定时智能关机的电源控制设计，以适应一般家用的使用习惯。在论文的后面部分，着重讲述了制作和调试中遇到的软件、硬件上的问题以及如何解决，并给出了音频功率放大器性能指标的国家标准测量方法。这些可以成为大家制作过程中的一些的提示以及测试的依据。关键词：3D环绕；集成芯片；直流电压音调控制；BTL；无信号自动关机AbstractWiththedevelopmentofpeople’slivingstandards,thehi-fiaudiosystemandfamilyvideosystemhavecomeintopeople’slife.It’snolongeradreamtoestablishasuitableandfavorablehi-fiaudiosystemaspeople’sdesiresforelectronicproductsarebecomingstronger.Undertheguidanceoftheratiobetweenqualityandprice,consideringthebasictechnicalindex,theessaydiscussestheordinarymulti-mediahi-fiaudioamplifiers.Thecontentoftheessaydevelopsfromshallowtoprofound,andisillustratedwithdiagramstointroducethestructuresandrelativeknowledgeofthehouseholdaudiosystem,andalsothedetailedworkingprocedures,includingtheentryoffrontextendingcircus,volumecontroller,voicedealingcircus,efficiencyextendingcircusandsupplycircus.Andmeanwhiletheessaydescribesthefeaturesofthemainchipandalsoonhowtouseandtolearnfromthissystem.I’vetriedmybesttomakethelanguageofthisessayeasyandsimpleforreaders,andwitheverywishthattheycanlearnsomethingusefulfrommyworks:howtomakeanaudiosystem,andhowtochoosetherightmaterialsforit.Aspertechniques,thedesignchieflyadoptstheintegratedchips.Inthisdesign,IadoptedtheNS’sLM4610Nwith3Dvoiceencirclingfunctionastheleadingchips,bychangingthevoltageofdirectcircustocontrolthevolume.Thefrontamplifieristhe“Masterofamplifier”NE5532,withthetypicalincrease20dB.TherearefficiencyamplifieralsoadoptsNS’sLM1875,everysteptwopieces,bridgingintoBTLpush-pullcircussoastoachievethehigherefficiencyandbettervoice.Besides,forcustomers’convenience,thesystemcantimelybeturnedoffautomaticallywhenthereisnosignal.Attheendofmyessay,Ialsostateaboutthedifficultiesandproblemsduringmydesignandtest,thewaystosolvestheseproblemsandalsooffersomestandardnationaltestingapproachesforreader’sreferences.Keywords:3Dencircling;Integratedchips;Voltagecontrollerofdirectcurrent;BTL;Automaticallyturnedoffwithoutsignal;目录引言...........................................................11家用音响系统..............................................11.1家用音响概述..........................................................11.2家用音响系统组成......................................................22家用高保真功率放大器........................................32.1功率放大器种类........................................................32.2高保真功率放大器主要技术指标..........................................43功放电源....................................................73.1功放电源概述..........................................................73.2功放电源组成..........................................................73.3整流滤波电路..........................................................93.4稳压电路.............................................................124方案论证阐述及可行性分析...................................124.1设计要求.............................................................124.2方案论证.............................................................134.2.1音调芯片方案选定...................................................134.2.2前置放大器方案选定.................................................134.2.3后级放大器方案选定.................................................144.2.4电源方案选定.......................................................144.2.5定时智能控制方案选定...............................................144.3具体方案阐述.........................................................144.3.1前级放大器方案阐述.................................................144.3.2后级放大器方案阐述.................................................184.2.5定时智能控制方案选定...............................................215.2电路板制作经验总结...................................................235.2.1制板步骤...........................................................235.2.2Protel99se的使用经验总结..........................................236功放的调试.................................................246.1调试步骤.............................................................246.2模块调试.............................................................246.2.1电源调试...........................................................256.2.2后级功放模块调试...................................................256.2.3前置放大模块调试...................................................256.2.4前置音调模块调试...................................................256.2.5电源控制模块调试...................................................267.1性能指标测试的必要性.................................................267.2主要性能指标测试.....................................................267.3测试所用仪器..................................