河南工程学院毕业设计河南工程学院毕业设计（论文）低频功率放大器学生姓名：系（部）：电气信息工程系专业：电气自动化技术指导教师：2010年6月10日摘要低频功率放大器是目前普遍应用于音频放大上的一种放大器，本方案采用分立MOS管IRF640和IRF9640组成，分立元件功放的优点是可以对工作状态和性能进行逐级调整，具有通频带宽，负载能力强，高保真等优点。本设计的低频功率放大器同时还具有测量显示功率输出、电源供给功率和整机效率的功能。本文首先对功率放大器的课题背景作简要的说明，随后对功率放大器的一些基础知识进行介绍。此外，相应的介绍低频功率放大器的各单元电路———前置放大、音调控制电路、音量控制电路和功率放大部分及功率测量的组成与工作原理，详细叙述了前置放大、功率测量电路部分。最后，本文具体叙述实用低频功率放大器的安装与调试，并对电路在工作中易出现的失真情况做了细致的分析。关键词：低频功率放大器功率输出音调控制电路音量控制电路AbstractLow-frequencypoweramplifieriswidelyusedintheaudioamplificationonanamplifier,theprogramusingdiscreteMOStubeIRF640andIRF9640component,discretepoweramplifierhastheadvantageoftheconditionandperformancecanbeadjustedstepbystep,withthepass-bandbandwidth,loadability,fidelityandsoon.Thedesignoflow-frequencypoweramplifierisalsoshownwithmeasuredpoweroutput,powersupply,powerandefficiencyoftheunitfunctions.ThispaperfirstabriefbackgroundofthesubjectPAinstructions,followedbysomebasicknowledgeofthepoweramplifieraredescribed.Inaddition,thecorrespondinglow-frequencypoweramplifiersintroduceeachunit---preamplifiercircuit,tonecontrolcircuit,thevolumecontrolcircuitandpoweramplifiersectionandpowermeasurementofthecompositionandworkingprinciple,detaileddescriptionofthepreamplifier,powermeasurementcircuitpart.Finally,thispaperdescribestheutilityofspecificlow-frequencypoweramplifierinstallationandcommissioning,andthecircuitintheworksituation,andsopronetodistortioninthedetailedanalysis.Keywords:Low-frequencypowerAmplifieroutputVolumecontrol,Tonecontrolcircuitcircuit提供更好的翻译建议感谢您为Google翻译提供翻译建议。目录摘要············································································································1目录············································································································3前言············································································································4第一章功率放大器技术指标概述·······························································6第一节功率放大器参数第一节···················