便携式扩音器0001

本科毕业设计（论文）本科毕业设计（论文）#regulatingequipmentandastheoutputsignaldriver,canrealizetherealworldconnection.Willbeverylonginthefutureinperiodoftime,thetialarithmeticamplifiermustin30Vorthehighersupplyvoltage,thesplendidpowerlossaswellasreducesthelayoutspaceaspecttorealizemoreimprovements.Inordertosatisfytheseapplications,theadvancedcraftandthesealtechnologyareveryimportant.thepreciseoperationalamplifierwillbebeingalltheragedaybydayinthenumerousmarketstransportspreciselyputswillturntowardthelowerworkingvoltage,alowerpowerlossandthesmallsealdevelopment.NotonlybecauseintegratesthepreciseoperationalamplifierinASICquitedifficultmoreovernottobeuneconomical,thereforethiskindofproducthasobtainedthemoredevelopmentopportunities.Althoughtheoperationalamplifiermarketpresentstheabovevarioustendencies,whatiswithoutadoubt,“multi-purpose”or“perfect”theoperationalamplifieronlywillbeforever“thecastleintheair”.Evenif“perfect”operationalamplifierluckybirth,itspriceexpensivealsosufficientlymakesoneshrinkbackatthesight,andtheuserwillalsothinkthat“theydonotneedtopurchasesuchproduct”.Engineerneedstosolvetheapplicationdifficultproblemiscontinuingtoincreaseeveryyear,butthemassiveoperationalamplifierneedstousefortosolvethiskindofdifficultproblem.Mayactaccordingtothedifferentvoltagetocarryontheexpansionthemodulartechnology,caninsolveinthiskindofquestionpromptsolutiontoplaytheinfluentialrole.Inaddition,butmustprovidetheadvanceddesigntoolandtheapplicationsupport,solvesthesignalwayproblem,thussatisfiesthemarketdemandwhichincreasesunceasingly.Electronicinstallation'squantityandthecomplexityareassumingthedetonationtypetogrow.Isdaybydaymaturealongwiththeseequipment,withoutadoubt,GaoYunputstheintegrationratetobepossibletoobtainthehigheconomicefficiency.However,solongasthenewelectronicinstallation'sinventionalsohasaposition,mustpopularizetheusemonolithicintegratedcircuitamplifier.origin:EDNelectrondesigntechniqueAuthor:ErrollDietz,AmericanCountrySemiconductorCompanyAmplifierProductdivisionvice-President.附录3电路原理图附录4元件清单列表序号元件名称元件代号元件参数数量1电阻R1.R1〜5.1K。22电阻R2.R2〜50KQ23电阻R3.R3〜100KQ24电阻R4.R4〜4.7KQ25电阻R4.R6100KQ26电阻R75.6KQ17电阻R8220KQ18电阻R833KQ29电解电容C1〜C550V/10HF510瓷片电容C70.22hF111瓷片电容C84700pF112瓷片电容C92200pF113瓷片电容C11.C150.1uF214瓷片电容C130.01uF115电解电容C14.C12.C1650V/1000uF316瓷片电容C17.C19104217电解电容C18470uF118电解电容C6100uF119电解电容C100.1uF120话筒MicLMic2221集成芯片LM324122集成芯片VR1LM7810123集成芯片TDA1013124电位器Rp1.Rp2100k225扬声器SPEAK4Q/5W1

附录5集成芯片介绍LM324系列运算放大器是价格低廉的带差动输入功能的四运算放大器。可工作在单电源下，电压范围是3.0V〜32V。LM324的特点：.短跑保护输出.真差动输入级.可单电源工作：3V〜32V.低偏置电流：最大100nA.每封装含四个运算放大.具有内部补偿的功能.共模范围扩展到负电源.行业标准的引脚排列.输入端具有静电保护功能TDA1013引脚功能及参考电压:1脚:0V——地2脚：7.7V——伴音输出3脚：16V——电源4脚：13.5V——电源5脚：0.3V——功放输入6脚：6.7V——前置输出7脚:2.8V——音量控制8脚：1.9V——音频输入9脚:0V——地TDA1013B是一个音频功率放大器集成电路，内部具有按对数曲线变化的直流音