一種音頻功率放大器芯片的設(shè)計(jì).pdf

1、華中科技大學(xué)碩士學(xué)位論文一種音頻功率放大器芯片的設(shè)計(jì)姓名：陳艷申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：微電子學(xué)與固體電子學(xué)指導(dǎo)教師：應(yīng)建華20060510華中科技大學(xué)碩士學(xué)位論文AbstractAudioPowerAmplifieriswidelyusedinhi曲performanceaudiosystems，stereophonographs，sgrvoamplifiersandinstntmentsystemsNowadays，peopleemp

2、hasizehi曲powerandhi曲efficiencya8wellashi曲fidelityfeatureofaudiopoweramplifierSoit’SworthtodesignanAudioPowerAmplifierwiththefeaturesofhi【曲powerandhigllefficiencyInthispapera20wattaudiopoweramplifierhasbeendeveloped，which

3、hasclassABoutputstage，andwithMillercompensationinternaltoguaranteethestabilityofcloseloopThechiphasinternalcurrentlimit、thermalshutdownandovervoltageprotectioncircuitWhenitisdeliveringhi曲outputpowertotheloadordrivingnonl

4、inearreactiveloads，thedegradationoftheoutputtransistororcatastrophicfailureofthewholecircuitmayhappenwithoutthoseinternalprotectioncircuitIt’Scapableofdelivering20wattofoutputtoa40or8Qloadat士25VsuppliesThedesigntakesadva

5、ntageofadvancedcircuittechniquesandprocesstechnologytoachieveextremelylowdistortionlevelsevenathi曲outputpowerThechipalsohasthefollowingfeatures：openloopgainof100dB，currentcapabilityof4Aslewrateof10V凰andpowerbandwidthof40

6、kHzDesignofeachblockisdescribedindetail，layoutconsiderationisalsopresentedinbriefandthesimulationwavesaregivenAtlast，theimprovementofchipfeaturesisproposedasthefeatureworkThe4pmHighVoltageBipolarprocessisusedtofabricatet

7、hischipWeuseCadenceSpectretansimulation，andresultsofsystemsimulationindicatethattheperformanceofthiscircuitmeetsexactlywiththedesigngoalsMeanwhile，wenseCadenceVirtuosotoeditlayout，andthechiphasbeeninfabricationnowKeyword