模拟集成电路试题

UNIVERSITYOFCALIFORNIAATBERKELEYCollegeofEngineeringDepartmentofElectricalEngineeringandComputerScienceR.W.Brodersen FinalExam EECS140(5/21/04) Spring2004Name: SID: -Showyourwork.-Makeapproximationstobewithin10%.-Writeyouranswersonthispagefor5points.Usethefollowingparameters:-Assumeall(W/L)=20,unlessotherwiseshowninthecircuit-Kn’=Kp’=10-4A/V2-λn=λp=0.01-γ=0V1/2-2Φf=0.6V-|Vto,n|=|Vto,p|=0.3V

(W/L)1.a) Ω(10pts)

(5pts)2.a) (5pts) (5pts) Ω(5pts)3.a) Ω(5pts)

a) Hz(5pts)a) Hz(5pts)b) Hz(107.a) F(10pts)b)

(5pts)

8.a) V(5pts)4.a) A(5pts)

b) V(5pts)PAGEPAGE8.0.6VIoutRbIoutRbVout-0.6Va)AssumingIout=Ib=10uA,findRbthatmaximizesthenegativeswingatVout.VddRsVoutVinAssumegm=10mS,Rs=50Ω,ro=1MΩ,Whattypeoffeedbackisthis?WhatisclosedloopVout/Vingain?Whatistheoutputimpedance?0.6V(40)vout10uAvinWhatisRout?Whatisgainvout/vin?

(80)-0.6V0.6VVR in

M1Vout-0.6VWhatisId3(currentthroughM3),ifR=20K?

40KAssumeRissetsothatId3=10uA,whatistheefficiencyofthestagegiventhatVinissetsuchthatoutputissymmetricalaround0V?Vin

1.2V

Vouta)AssumingCgs=100fF,Cgd=Csb=Cdb=10fF,gm=10mS,ro=1M,whatisthe–3dBfrequencyofthiscircuit?0.6V10K10K200fF10KVo1Vo2Vi1Vi2100fF-0.6VAssumero=1M,gm=10mS.Whatarethepolesandzerosfordifferentialmodegain,Adm?Whatarethepolesandzerosforcommonmodegain,Acm?1.2V10KCc10K10KCc10K10K10K1pF1K9K10K10Kina)Assumegm=10mS,ro=1M,whatisvalueofCcsothatthephasemarginis45degrees?0.6VVout10uAVi1 (5) Vi2(60)-0.6VIfVout=0V,whatistheminimuminputcommonmodevoltageforwhichalldevicesstay