PAGE\*MERGEFORMATIV-PAGEI-毕业论文（设计）题目高效音频功率放大器英文题目Highperormanceaduiopoweramplifier院系专业姓名年级指导教师年月摘要在音频领域发展的几十年里，A类，B类，AB类音频功率放大器一直占着主导地位，随着科技的不断发展，音频功率放大器也有了新的研究成果—D类功率放大器。D类功率放大器有很多优点，因为低功耗产生热量较少，节省印制电路板（PCB）面积和成本，并且能够延长便携式系统的电池寿命。D类放大器，是通过控制开关单元的ON/OFF，驱动扬声器的放大器。D类放大器是最近几年才发展起来的，在系统的耐用上以及音频质量等都有了很大的提高。关键词：D类功率放大器、TDA8922TH、PWM调制、电压开关型驱动电路PAGE\*MERGEFORMATIIITheFormatCriterionofMaster’sDegreePaperofDUTAbstractIntheaudiofieldfordecades,AClass,BClass,ABaudiopoweramplifierhasoccupiedtheleadingposition,withthetechnologycontinuousdevelopmentoftheaudiopoweramplifieralsohasanewresearch-Dpoweramplifier.ClassDpoweramplifierhasmanyadvantages,becausethelow-powergeneratinglessheat,savingprintedcircuitboard(PCB)areaandcost,andcanextendbatterylifeinportablesystems.ClassDamplifier,throughthecontrolswitchunitON/OFF,theamplifierdrivesthespeaker.ClassDamplifierisonlydevelopedinrecentyears,thedurabilityofthesystemandsoonandtheaudioqualityhasbeengreatlyimproved.Keywords:Dpoweramplifier,TDA8922TH,PWMmodulation,thevoltageswitchingdrivecircuit目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc416369171"AbstractPAGEREF_Toc416369171\hIIIHYPERLINK\l"_Toc416369172"引言PAGEREF_Toc416369172\h1HYPERLINK\l"_Toc416369173"一、Ｄ类功放的发展与基本要求PAGEREF_Toc416369173\h2HYPERLINK\l"_Toc416369174"1.1D类功放的发展背景PAGEREF_Toc416369174\h2HYPERLINK\l"_Toc416369175"1.2D类功放诞生的原因PAGEREF_Toc416369175\h2HYPERLINK\l"_Toc416369176"1.3功率放大器的基本组成PAGEREF_Toc416369176\h3HYPERLINK\l"_Toc416369177"1.4对功率放大器的基本要求PAGEREF_Toc416369177\h4HYPERLINK\l"_Toc416369178"二、D类功放的特点与电路组成PAGEREF_Toc416369178\h5HYPERLINK\l"_Toc416369179"2.1功放的分类PAGEREF_Toc416369179\h5HYPERLINK\l"_Toc416369180"2.2几类经典功放的工作原理及特点PAGEREF_Toc416369180\h5HYPERLINK\l"_Toc416369181"2.3传统功放与D类功放的比较PAGEREF_Toc416369181\h7HYPERLINK\l"_Toc416369181"2.4D类功放的特点PAGEREF_Toc416369181\h7HYPERLINK\l"_Toc416369182"2.5D类功放的组成与原理PAGEREF_Toc416369182\h8HYPER