毕业设计（论文）题目:专业:应用电子技术班级:学号:姓名:指导老师:I成都工业学院二一四年六月〇II摘要随着社会的不断发展，功放出现在了人们生活的方方面面。目前，音频功率放大器仍以模拟功放为主流产品，模拟功放经历了数十年的不断改进和完善，其技术已发展到了顶峰。模拟类功放是以线性放大为基础，功率放大器件有电子管和晶体管两类。晶体管功放的最大优点是电源转换效率高（C类功放最大可达55%）、体积小、重量轻、发热量不大、生产成本低。缺点是转换速率低、偶次谐波失真较大。音质和可靠性指标都略逊于电子管功放。随着晶体管制造技术的不断提高和新技术的应用，各项实用性指标和可靠性指标都有很大改善，并不断在向更大的输出功率、更小的体积、更轻的重量、更多的功能和智能化方向发展本设计是紧贴现实生活来设计的是一个实用音频功率放大器。设计电路主要由前置放大电路、音调控制电路及功率放大电路三部分构成，其中，前置放大电路采用同相比例运算器来实现电压的放大；音调控制电路采用负反馈式来实现音调控制；前置放大电路及音调控制电路均采用NE5532双运放实现，功率放大电路采用TDA2030功率放大器来实现功率放大。关键词：音频功率放大器NE5532TDA2030IAbstractWiththedevelopmentofsociety,thepoweramplifierinallaspectsofpeople'slives.Atpresent,theaudiopoweramplifierwithanalogamplifieristhemainstreamproducts,analogamplifierhasexperienceddecadesofcontinuousimprovementandperfection,itstechnologyhasdevelopedtoapeak.Analogamplifierisbasedonclassbasedlinearamplification,thepoweramplificationdevicehastwokindsofelectrontubeandtransistor.Themainadvantageofthetransistoramplifierisapowerconversionefficiency(classCpoweramplifierupto55%),smallvolume,lightweight,lessheat,lowproductioncost.Drawbackisthelowconversionrate,evenhigherharmonicdistortion.Qualityandreliabilityaredisplayedintheelectronictubepoweramplifier.Withthecontinuousimprovementoftransistormanufacturingtechnologyandnewtechnology,theavailabilityofindicatorsandreliabilityhavebeenimprovedgreatly,andcontinuetoagreateroutputpower,smallervolume,lighterweight,morefunctionsandintelligentdirectionThedesignisclosetothereallifetothedesignofapracticalaudiopoweramplifier.Circuitdesignbythepreamplifiercircuit,tonecontrolcircuitandpoweramplificationcircuitiscomposedofthreeparts,wherein,thepreamplifiercircuitusingin-phaseproportionamplifyingarithmetictorealizevoltage;tonecontrolcircuitwithnegativefeedbacktorealizethetonecontrol;preamplifiercircuitandtonecontrolcircuitadoptsNE5532dualoperationalamplifier,poweramplifierthecircuitusesTDA2030poweramplifiertoachievepoweramplifier.KeyWords:AmplifierNE5532TDA2030II目录摘要...........................................................IABSTRACT...........................................................II第一章绪论.........................................................11.1音频功率放大器简介............................................11.2功放的常见分类................................................11.3功放的性能指标................................................2第二章设计方案.....................................................32.1设计要求分析..................................................42.2预定方案......................................................42.3方案论证......................................................5第三章方案实施.....................................................63.1模块电路分析与设计............................................63.1.1前级放大模块...............................................63.1.2调音模块..........................................
