杭州矽力杰笔试

ICDesignEngineerTestSheetAnalogDesignDeviceKnowledge1.p+/n-junctionandp-/n+junction,whichhasahigherbreakdownvoltage?Why?Forap+/n-junctionhavingNAandND,whatistheapproximatefunctionofjunctioncapacitance(Cj)vs.reversebiasedvoltage(VR)?2.Drawthecross-sectionofaCMOSinverter.Drawtheparasiticstructureonthecross-section.Describewaystoprevent“latch-up”?CircuitAnalysis3.Seethefigurebelow.a.Drawthebodeplotforthiscircuit.b.Estimatethesystematicoffsetinthisamplifier.c.Whichisthepositiveinput?4.Seethefigurebelow.a.Whatisthiscircuit?b.Whichinputisthepositiveinput?c.HowmuchcurrentflowsinP2?d.IfI=10uA,whatisagoodselectionforthevalueofR?e.WhatistheCommonModeInputRangeforthiscircuit?f.WhatistheCommonModeOutputRangeforthiscircuit?g.AssumetheonlycapacitanceisfromOUTtoGND.DrawaBodePlot.h.Assumenoload.WhatisthemaximumpositiveslewrateifCOUT=C?Whatisthemaximumnegativeslewrate?5.Seethefigurebelow.Assumeattime=0inductorcurrentis0A.Drawinductorcurrent,VXandVOUTvs.time.6.Seethefigurebelow.a.Whatisthiscircuit?b.WhatisthedesiredratioR2/R1?c.Howmanystablepointsdoesthiscircuithave?d.AssumeR1andR2havenoTemperatureCoefficient.DrawagraphofIinR2vs.Temperature.e.Whatistheminimumsupplyvoltagenecessaryforthiscircuittoworkproperly?7.Seethefigurebelow.a.Writethegainequationofeachcircuit.b.AssumingVO=0attime0.SketchVO(t)forthegiveninputsignal.8.DrawBuckConverterCircuitandkeywaveform,explainthebasicoperationsatsteadystate.OtherMustAnswer(Question1-3)Question1:WritetheV/Irelationshipequationsforresistor(R),capacitor(C),andinductor(L).Question2:GivenVBinTable1,pleasecalculateVCandVE.Assumptions:betaofNPNisinfinity,P-Njunctionforwardvoltagedropis0.7V.VBVEVC0V10.7V20.7VQuestion3:假设图中理想放大器工作在深度负反应状态，请计算以下图输出端电压〔VOUT〕。ForTestEngineer(Question4-5)Question4：用C语言写一个递归算法求N!Question5：C语言题目a.在VC6.0编译环境下，以下类型变量需要占几个字节内存：intfloatdoublelongcharunsignedcharb.以下程序的输出结果：#defineADD(x)(x)+(x)main(){inta=4,b=6,c=7,d=ADD(a+b)*c;printf(“d=%d\n”,d);}c.设inta=7,b=9,t;执行完表达式t=(a>b)?a:b;后，t的值是？d.设计一个排序函数，并同时获得最大值，最小值，均方根。函数名、排序数列等自行定义。ForAEEngineer(Question6-8)Question6:a.WhatisthiscircuitshownintheFigure?b.PleasedrawthewaveformsforV2forthreecases(usethesamescale):C1=open,R3=1k;R3=open,C1=1uF;R3=1k,C1=1uF.Question7:DrawbodeplotsofVO/VI(gainandphase)forthecircuitshownbelow.Pleaselabeltheproperpole/zerolocation.Case1:R3=openCase2:R3=1KQuestion8:Figurebelowshowsasimplebuckconverter.Theswitchingfrequencyoftheconverteris1MHz.a.VIN=10V,VOUT=4V,IOUT=5A,whatistheONtimeofQ2?b.DrawwaveformsofVSWandIL1below(underthesametimescaleofVG-VSW).Assumption:IOUT=5A.ForLayoutEngineer(Question9-12)Question9:简述CMOS工艺流程。Question10