spring2011test2a - Sufi We “Wt e Pt a). gamma Elvle '2-...

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Unformatted text preview: Sufi We “Wt e Pt a). gamma Elvle '2- 0 it Prob. 1 “LE Answer each part inthe space provided. '4 (a) What are fine characteriefics of an ideal op amp? l ._ “a — ch} - w + \JP '3— Un I P 4 {b} Draw the circuit for the dependent source model of an op amp. Va *1 VI Rf“ up 4” 4 (c) 1Which quantity hastohecontinuoua inanintluctoranrlwhy? CHT‘Tfl/xt a . q 1 l n: can - We, mm: Agnew ‘7”: J Wu Fl: ELIE- éthX-rér : 4 (ti) Sketch the current in a capacitor diachargert from an initial voltage V: to a + I L final voltage V1. Assume V1 and ‘9'; both are positive, V1 3—- V; and the final V; voltage V2 is the DC steady.r state value. .eT C. #4: an (Ia—w.) e; if v: ~= cc: ' r._-l:: 2-. :cfl'é: iCVFVL): E It en; T @}"VL) c. "'— r “Rifle R a 4 (e) A lI'J-mH inductor is charged fi'ctn an initial current of it] mfl. to the final current nf4fl mA without reversing the direction of current flow. Determine inductor volfle afler 5 seconds of charging. Use the time constant of H] seconds in your calculations. ' _ __*l:.—' . ll'l.. -1- {LT- He“ *(lfierqfi)€— MD HE J;— “L. UL. : L ill—l— : loaf-'33 [w§c)('l‘ D F: tell} '- . cal-i: 4: *“‘ F6 " /lc - UL- -;. EH: 74in: Q. gig! _ #6 #9:; "Jl E FELL? Escapinch ec'a :- lgr Hmj: An ideal pp amp circuit is show belnw. The supply voltagas are also Shfl-WII (an that fill can watch fflr saturation}. ,fi -- a V View F V? " 9' :LFQ + Zr-Va FD QUE i?“* 5 {filletmm'nelm __ __,' v0 +h~w 1-9 4r "2“ 1‘ j; : Sakfi ‘EC’F‘I" £0 E fiak‘ T :firlyg'k; R filfifi'nlmfi '13 5 [ED Now replace the SD-kfl resistor by a 16!}- kfl mistur and find IL. 1“; 1““:- -1—.. gag 15pm 1-: '12:? \ID'Z— '5‘qu S&*H?ifiéhfi ficfihrfi¢=¥%:fwlv L _' earn-a. ' H Prob. 3 “T‘- Consider time capacitars connected tn a black box as Shawn below. Given: mm) = 150 1:; v1{fl)= 5:: v; m} =_ sac-1”“ mA far 1: 'c- n. 2 {:1} Fur which of the capacitm‘s the passive sign cuuvmfiun is not obeyed? Err 'I 57/4 #3 I 3 (c) Find the equivalent capacitance cccccctcd tc the box. ‘+ _ ‘i_ + ‘___ Eli, 'lu {15"+L§) “ .. at 5 {G} Distal-min: wit) furtafl. L ‘95:: "H . Up 3%.; flaw Va+-V2_—-\J'-:—c “PT \1 == “1*V2— 5 (:1)th vfit}. t 1 .. * 50+ 8 Lair “1&7 ' lowzé a it Agra: = \ugfijfia'fi‘fil 1: 1 Figwb'x _~—, 5'1: +‘cacnflu [Fifi a rum; r‘iwb .. gt; ...- $528.- “*g'j #- .__[E:a-*t \( utt‘cfi 7'— 5 (e) Find ilfl]. (Hint: Can you use the current dividcr furmula'?) I: t: if: L :2. [ JET-HE” 3 “Ia-34: L: .:._ 5:: a. “MA 5 (f) Find the marg}? transferred to the: box by iutcgra ' the. puwer. ac, , F—EWL ,g—mcm’t w = S mg L 5.1L- ?- S tundra, $.39?th as“: D U :I "-3 Sm EMtGfiJ‘: w: 111ij Prab. 4 The following flimuit was in a DC steady state at t = U'and the switch mums frum positiun(a)tu(b)att=fl. _ ' m. m W 1-0 572-1"— Sea—m 5 (b) What is the ill-111mm!" cunth [Dug firm: after the switching mama? {Lccfi) :0 L (3,. ‘VW ["5 a 1m: 9W3, M moi he? {ho'fy’lIDJE’hJQ/J mrcfis’ 5 (e) Determine the time constant 1: after the switohing. 5 (:1) Write the expression for i113) for E D. t_ :- I'IU mutt): e+£|~elfliff '3‘ - -'--""_-_-_. {Liter} =- to “wing A 5 {e} Find vx-{t} for t 3- {L r _ UK ff, : 5 Vet: {L r “‘1” "1" too: 1'59 H Wot “ _ 32:) E: B 5 [f]: 15 waft) continuous at t = I]? Justify your answer. “Le-JG Cesfi‘fihatam TH ...
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spring2011test2a - Sufi We “Wt e Pt a). gamma Elvle '2-...

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