1、UNIVERSITY OF CALIFORNIA AT BERKELEYCollege of EngineeringDepartment of Electrical Engineering and Computer ScienceR.W. BrodersenFinal ExamEECS 140(5/21/04)Spring 2004Name: SID: -Show your work.-Make approximations to be within 10%.-Write your answers on this page for 5 points. Use the following par
2、ameters:-Assume all (W/L)=20, unless otherwise shown in the circuit as-Kn=Kp=10-4 A/V2-n=p=0.01-=0 V1/2-2f=0.6 V-|Vto,n|=|Vto,p|=0.3 V(W/L)1. a) (10 pts)b) (5 pts)2. a) (5 pts)b) (5 pts)c) (5 pts)3. a) (5 pts)5. a) Hz (5 pts)6. a) Hz (5 pts) b) Hz (10 pts)7. a) F (10 pts)b) (5 pts)8. a) V (5 pts)4.
3、a) A (5 pts)b) V (5 pts)8.0.6 VIoutRbVoutIb-0.6 Va) Assuming Iout = Ib = 10 uA, find Rb that maximizes the negative swing at Vout.VddRsVoutVinAssume gm = 10 mS, Rs = 50 , ro = 1M,a) What type of feedback is this?b) What is closed loop Vout/Vin gain?c) What is the output impedance?0.6 V(40)vout10 uAv
4、ina) What is Rout?b) What is gain vout/vin?(80)-0.6 V0.6 VVRinM1VoutM3M2-0.6 Va) What is Id3 (current through M3), if R=20 K ?40Kb) Assume R is set so that Id3=10 uA, what is the efficiency of the stage given that Vin is set such that output is symmetrical around 0 V?Vin1.2 VVouta) Assuming Cgs = 10
5、0 fF, Cgd = Csb = Cdb = 10 fF, gm = 10 mS, ro =1 M , what is the 3dB frequency of this circuit?0.6 V10K200fF10KVo1Vo2Vi1Vi2100fF-0.6 VAssume ro = 1M , gm = 10 mS.a) What are the poles and zeros for differential mode gain, Adm?b) What are the poles and zeros for common mode gain, Acm?1.2 V10KCc10K10K
6、10K1pF1K9K10K10KVVoutina) Assume gm=10 mS, ro = 1 M , what is value of Cc so that the phase margin is 45 degrees?0.6 VVout10 uAVi1(5)Vi2(60)-0.6 Va) If Vout = 0V, what is the minimum input common mode voltage for which all devices stay in saturation?b) If Vi1 = Vi2 = 0V, what is the minimum Vout for which all devices stay in saturation?
