s07-final-solution

# s07-final-solution - E CE 1 08 Final Exam Wednesday une 13...

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ECE 108 Final Exam Wednesday, June 13 Spring 2407 You are reminded that academic dishonesty will NOT be tolerated. You have 3 hours to complete the exam. You may refer to I sheet of your own hand-written notes but no other reference material. You mav also use a calculator. Question Your points Out of I 10 2 ^ J 4 5 6 Total 60 Name Solu4-,-r, Student ID Signature

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1. (10 points) For the short-channel CMOS circuit below, assume thatVpp : 2.5V, kn : k;(Wl L)": 115 pAlV', ke kL(Wl L)p : -L05 p"AlV', Vosor* 0.63 V, Vostrp : -LV,Von 0.43V, andVlse : -0.4V. Ignore channel length modulation. (1 point) Describe the function ofthis circuit. I ow vo t hf S u't r "ty d"f:{.- (2 points) Calculate Voa andVs6 ignoring the body ffict. (3 points) Calculate the propagation delay fa caused by an input transition 0 to Vpp. Assume that tais measured from o4, f to uo6 (Von + VoL) 12 and C 7 20 fF. (2 points) Determine the energy supplied by the power supply during the output transi- b) Vou= Vr:p - V+n = z,E- D'tB 1,07 v Vou- lv6r1- o,qv vin rc) Whea V;* pis€t lo Vnp , ML fu.nr .,ff. anA M t 1o*S r-nhp S^h,tr"a*ton - As runz |,act)r tDn occurs tt)h?n t= o @ t=o )+ Uin= Vo D, W,ar = V au .V, 'A', Uin=UDD) UOual= VAL lllsr--VnD-Vce 2,5-0,+--2-lV Jvo 7V>e nrNr o, 6iV t:O o(bS *el l,=- l^VnsnN ( v;; - V.s!l (r^Vot*trv ( Voo Vi.nt- qSI" 2-- \ z^ dWur ): L1 -F dWu+ Voo - UJry - 116'+F l1lirlts \lon - ryr\$r" L '[D"t- (a) (b) (c) (d) tion caused by uon and the energy i€* tr^^s brrecl l€ (e) (2 points) Now take body effectinto account. Determine'uss for M1. Would Von be CL larger or smaller than that in part (b)? Explain. U)h,!rt^ [ouf="\Jrp4 Trn,vt( M'1, velccilvt sahlralrgd fu. :----* -{ ""- (Vou+Vau -t -z*^ -t I Vor Z1 .\F- 1 @J t= tp ., hn=VDu, ?/-oor: Vor-+ Vq1 l.Ljg V z Urr s =.[a- Vewl 1,9 I - LJ S .zUV > Vo:*r r,l
(r' )r, dx = l,^ k-L Var*ru (continued) -^o Ld= Vop - Vot Cr- paVos*rN zalr VasArN Wu*Vou 2* f-n - 8n 2,5- O.7tg- 0,v 2.5- O"3t5 - l- 235 cd) rc) F-nle 1+ trpp lred b,; lt'r!- (k 'o )D : \Y,: c,-vap d %ur = pouJer r upply crry vo, # f zelFx ?.5v x (z.o1V- o"+V) 8?"5 f .f ener7',t t*"s{enna lv CL (q: .r'. (w . dWwY rr,.r r& \; 't'; l'G^t N )r t'T ".*ruo, [ y.o* .c1 1Ar,n t d.'tfou; f ctu;"f lr", ) Uoe

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• Spring '09
• KennethYun
• Trigraph, unction fthisc ircuit, hort-channelMOSc ircuitb elow, Determinethe logic function, Calculatethe propagationdelay fa

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s07-final-solution - E CE 1 08 Final Exam Wednesday une 13...

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