杭州矽力杰笔试.docx

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1、ICDesignEngineerTestSheetAnalogDesignDeviceKnowledge1. p+n-junctionandp-n+junction,whichhasahigherbreakdownvoltage?Why?Forap+n-junctionhavingNaandNd,whatistheapproximatefunctionofjunctioncapacitance(Cj)vs.reversebiasedvoltage(Vr)?2. Drawthecross-sectionofaCMOSinverter.Drawtheparasiticstructureonthec

2、ross-section.Describewaystoprevent“latch-up”?CircuitAnalysis3. Seethefigurebelow.a. Drawthebodeplotforthiscircuit.b. Estimatethesystematicoffsetinthisamplifier.c. Whichisthepositiveinput?4. Seethefigurebelow.a. Whatisthiscircuit?b. Whichinputisthepositiveinput?c. HowmuchcurrentflowsinP2?d. IfI=IOuA,

3、whatisagoodselectionforthevalueofR?e. WhatistheCommonModeInputRangeforthiscircuit?f. WhatistheCommonModeOutputRangeforthiscircuit?g. AssumetheonlycapacitanceisfromOUTtoGND.DrawaBodePlot.h. Assumenoload.WhatisthemaximumpositiveslewrateifCou=C?Whatisthemaximumnegativeslewrate?5. Seethefigurebelow.Assu

4、meattime=0inductorcurrentis0A.Drawinductorcurrent,VxandVouvs.time.6. Seethefigurebelow.a. Whatisthiscircuit?b. WhatisthedesiredratioR2R1?c. Howmanystablepointsdoesthiscircuithave?d. AssumeRiandR2havenoTemperatureCoefficient.DrawagraphofIinR2vs.Temperature.e. Whatistheminimumsupplyvoltagenecessaryfor

5、thiscircuittoworkproperly?7. Seethefigurebelow.a. Writethegainequationofeachcircuit.b. AssumingVo=Oattime0.SketchVo(t)forthegiveninputsignal.8. DrawBuckConverterCircuitandkeywaveform,explainthebasicoperationsatsteadystate.OtherMustAnswer(Question1-3)Question1:WritetheV/Irelationshipequationsforresis

6、tor(R),capacitor(C),andinductor(L).Question!:GivenVbinTable1,pleasecalculateVcandVe.Assumptions:betaofNPNisinfinity,P-Njunctionforwardvoltagedropis0.7V.VbVeVcOV10.7V20.7VQuestion3: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(VOU)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

7、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;PriDtf(d=%dn,d);)c.设inta=7,b=9,t;执行完表达式t=(ab)?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. Pleasedrawt

8、hewaveformsforV2forthreecases(usethesamescale):C=open,R3=lk;R3=0pen,Ci=IuF;R3=lk,Ci=IuEQuestion7:DrawbodeplotsofVoV(gainandphase)forthecircuitshownbelow.Pleaselabeltheproperpole/zerolocation.Case 1: R3=openCase 2: R3=1KQuestion8:Figurebelowshowsasimplebuckconverter.Theswitchingfrequencyoftheconverte

9、ris1MHz.a. Vin=IOV,Vout=4V,Iout=5A,whatistheONtimeofQ2?b. DrawwaveformsofVswandIlibelow(underthesametimescaleofVg-Vsw).Assumption:Iou=5A.ForLayoutEngineer(Question9-12)Question9:简述CMoS工艺流程。Question10：Drawthelayoutofatwo-inputNANDgate.Question11：下面电路图中有两个MOSFET(MAandMb)。假设每个MoSFET有两个gatefigure,右下幅员应该如何连接，才能使MA和MB匹配。Question12：画出不同的电流镜图，并简述各自特点。