Lesson 06 Performance Parameters电子技术专业英语教程

Unit2OperationalAmplifierLesson6PerformanceParameters《电子技术专业英语教程》冯新宇主编电子工业出版社《电子技术专业英语教程》2Lesson6PerformanceParameters•Backgrounds•Texttour•Languageinuse–Vocabulary–Structure–Reading/writingtechniques2020/2/3《电子技术专业英语教程》3•Terminology–negativefeedback负反馈–unity-gain单位增益–closed-loopgain闭环增益–open-loopgain开环增益–inputoffsetvoltage输入失调电压Backgrounds2020/2/3《电子技术专业英语教程》4Texttour•Outline–Overview–Finitegain–Bandwidth–InputOffsetVoltage–Slewrate–common-moderejectionratio(CMRR)2020/2/3《电子技术专业英语教程》5•Formathematicalcalculations,theidealopen-loopgainisinfinite;however,itisfiniteinrealoperationalamplifiers.–100,000toover1millionFinitegain2020/2/3《电子技术专业英语教程》6Bandwidth20log|Av|0f3-dBfuf(logaxis)•Bandwidthisusuallydefinedastheunity-gainfrequency.2020/2/3《电子技术专业英语教程》7•Theinputoffsetvoltageisseentobetypically1mV,butcangouptoashighas6mV.InputOffsetVoltage2020/2/3《电子技术专业英语教程》8Slewrate•Slewrateisdefinedasthemaximumrateatwhichtheop-amp’soutputvoltagechangesinthepresenceofalargeinputsignal.•ItcanbeexpressedasmaxoutdVSRdt2020/2/3《电子技术专业英语教程》9•TheCMRRcanbedefinedascommon-moderejectionratio(CMRR)VCVDAACMRRAVD:GainindifferentialmodeAvc:Gainincommonmode2020/2/3《电子技术专业英语教程》10•Vocabulary–oscillation,stability,merit,desire•StructureLanguageinuse2020/2/3《电子技术专业英语教程》11Vocabulary2020/2/3《电子技术专业英语教程》12Oscillationindictionary•振动性oscillationtheoremsforlinearsecondorderdifferentialequations二阶线性微分方程的振动性定理•振动ANOSCILLATIONTHEOREM一个振动定理•震荡FromEquilibriumtoOscillation从平衡点到振荡2020/2/3《电子技术专业英语教程》13Oscillationintext•First,associatedwiththebandwidthlimitationisaphasedifferencebetweentheinputsignalandtheamplifieroutputthatcanleadtooscillationinsomefeedbackcircuits.•在很多反馈通路中，结合有限带宽的性质，如果放大器两端输入信号的相位不同，输出将产生震荡。2020/2/3《电子技术专业英语教程》14Oscillationinuse•initialoscillation最初摆动•aperiodicoscillation非周期性震荡•differentialoscillation差速震荡•circularoscillation弧形振动2020/2/3《电子技术专业英语教程》15Stabilityindictionary•Thestateorqualityofbeingstable,especially:稳定：稳定的状态或性能，尤指：•Resistancetochange,deterioration,ordisplacement.稳定性：防止变化、恶化或移位的稳定性•Constancyofcharacterorpurpose;steadfastness.性格或毅力坚定；坚决•Reliability;dependability.可信性；可靠性2020/2/3《电子技术专业英语教程》16Stabilityintext•Theinternalfrequencycompensationusedinsomeop-ampstoincreasethegainorphasemarginintentionallyreducesthebandwidthevenfurthertomaintainoutputstabilitywhenusingawidevarietyoffeedbacknetworks.•当应用在范围较广的反馈网络中时，在运算放大器内部能够增加增益或者相位裕度的频率补偿会降低带宽来进一步维持输出的稳定性。2020/2/3《电子技术专业英语教程》17Stabilityinuse•latticestability晶格稳定性•staticalstability静态稳定性•chromosomalstability染色体稳定性2020/2/3《电子技术专业英语教程》18Meritindictionary•Superiorqualityorworth;excellence:价值：卓越的品质或价值；优秀之处•Aqualitydeservingpraiseorapproval;virtue:优点：值得表扬赞赏的品质；美德•Demonstratedabilityorachievement:显示出的能力或功绩•OftenmeritsAnaspectofcharacterorbehaviordeservingapprovalordisapproval:常作merits功过：优缺点应予赞许或否定的性格方面或行为•TheologySpiritualcreditgrantedforgoodworks.【神学】给予好作品的精神荣誉2020/2/3《电子技术专业英语教程》19Meritintext•Thecommon-moderejectionratioisanimportantfigureofmeritforoperationalamplifiers.•共模抑制比是运算放大器中重要的性能参数。2020/2/3《电子技术专业英语教程》20Desireindictionary•想望,期望,希望,请求(官方丈礼)•愿望,心愿,要求•要求2020/2/3《电子技术专业英语教程》21Structure2020/2/3《电子技术专业英语教程》22Reading/Writingtechniques