EEE4306_QUIZ__1_2011_Solution

EEE4306_QUIZ__1_2011_Solution - EEE 4306 QUIZ 1, 100 Points...

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Unformatted text preview: EEE 4306 QUIZ 1, 100 Points Name: Anya Q 60 Minutes. Open Note, Open Book, 1/24/11 UFID Circuit Element Values, VsuppLy = 15V M1: RIN = 100 KQ, R01 = 800 KQ, RGz = 400 KS2, RD: 8 K9, Q1: Rx = O Q, RBI = 20 K9, R32 =10 KQ, R0: 100 KQ, Q2: R33 = 20 KS), R134 =10 KQ, RE] = 125 Q, RC: 7 K9, RL = 7 K9, BJT parameters: [5 = 150, VA = 100V, base-emitter VBEON E 0.7V, Thermal voltage, Vt = 0.025V, MOSFET Parameters, VT = 1 V, k = 16mA/V2 = 1/2unCox(W/L) , 9» = 0. VSUPPLY VSUPPLY VSUPPLY V)’ f 951405”) L— ”sz 0;") =5V 195,, Wag M: 11 yew/<31 £5, +195, = W: w: 4/23/cJL [WI/l“ “14* RE 5 4L3le—I27J2=£/;/X/t/L Biasing Calculation: (16 points): Find the numerical values for the circuit elements v69, w +11: V, m. PickREz and Rs, (R131=125 9), so that IEz=Im= lmA. \j kl 25 V INA/v2 07F: ’ R52=i_Z_E__J%;__—- Rs= 3, . 1 Va,’ v; — RG20”) ,. :W imp/2n. +§ooHL ks= W- WV; 3.75ka .- lwv/t' 1M4 Midband Gain Calculation: (64 points) Assume C1, C2, C3, C4, Cs and CE = 00 for this section of the quiz. These capacitors will short all signals except for DC. Use the values of R5, R52, and Rs from above. Input MOS Section Gain: (10 points out of 60) Write the expression (equation) for the input section gain Vz/VIN in terms of the circuit elements above. Use the small-signal values of V___m. 12__ Rel/Waz— _ fmkn/I‘MO/cfi. ‘— VIN RW 4.. gm flflgz mo ,1;er 4. yeah/1H 700/?4- Find and report the numerical value of the input section gain 1: VIN MOS Transistor Stage Gain: (15 points out of 60) Write the expression (equation) for the MOS Input stage gain Vy/Vz in terms of the circuit elements above. Use the small-signal valuesofVX/X; 67.431)?le : 99/6MA/vz.jmlq : 3m A/V M 3= wmfau Gm.” Eolifiaa” 994” V77)“ (8H)/efi)llfiai V2 - - - A ,_ 12L é 375&J2_ Flnd and report the numerical value of the stage 2 gain r17; z, 0 6m; yaw/M] VY —= - QM/vézkanH leQI/2aEM/IDk12/l(?75b}z+0§/ )I251L>” 259 V2 T21“: : ‘75:,” s 251%: ‘fia'zvfl’ BJT Stage 1 Gain: (15 points out of 60) Write the expresswri/ (equation) fo the stage 1 section gain Vy/Vx in terms of the circuit elements above. Use the small-signal values of (1:15,, W 3 Roll R0” legging,f II (V771+(~8H)(P5,))” Em, Wu, re , + K, "[8,, ll 25, HEB, Il/r774({3+-,-)//95,)) 11 [214/ Find and report the numerical value of the stage 1 gain, Hint: You may be able to estimate this gain within 5% and be correct without calculation. 3-0‘1’k/L ‘-— 929563; -—‘_. VY 9:1 _ , , ——r _.._..__.__ vSignal W. Eisenstadt 2 0 I f zlmww.l@ Male (26 9+; =0 BJ T Stage 2 Gain: (15 points out of 60) Write the expression (equation) for the BJ T stage 2 gain Vout/V y in terms of the circuit elements above. Use the small-signal values of W&z:'l‘oz EH— RElB W >2/0pl/ [+125./§/ > 5’ 58l/rj2. REM—gag 77% lm/‘l 2251+;sz +7759 VOUT _ VY — , QM ._ 90m! V [7 l-c/Ll/ 7/:JL [1 53/50 ‘ l + 4W (I221) Find and report the numerical value of the stage 2 gain GM; agaa/fl #71925, 91ml: qdflé/V‘ (RC Hal/Q01) : 2. VOUT VY Gain Comparison: (9 points out of 60). Which amplifier gain is higher, the BJT—to-BJT (VOUT/VSignal) or the MOS-to-BJT (Voqulang,Why2. ..... M”... .... __w\ C; 377-40 — 377*) gm .. /x (r233) Wu M (. 72 7M, 2> ('23-?) "/1/ Mp4} —-z<D//_D)77—‘ icy/M: M... r , / % 57_7La~-B]/ l4: 4 34 V1,. K Cree/5F were. “Jen lip yaw Maw f5 Wt—aw’mM Vaur Low Frequency Capacitance: €20 points), Assume that you are going to use 10 uF for Ma S 7‘ 577‘ low frequency capacitors C1, C2, C3, C4, and CE and 15 uF for Cs. fiq M5 What is the low frequency pole Cs sets? Is very close to on? Why or why not? (Dos: «J’- CS W £3” Elihu? ifibdl gf/V QEQ<5 QEQ :: [ZIJL I - +7!- _ 2: f /V — 37 A A)” ’ Qz/JQ 5qu S /S 3/ Mi ~- 5 m F C. 96,9452. W m 15F s ,u/ E ’1 jI/v r) res/“SW / M CE.W T0 berj’Q (1/1, wCfi >7 wag! W. Eisenstadt 3 Bonus High Frequency Cutoff: (5 points). What is the value of the low frequency pole CE sets if it is 10 HF? __,L—-—’-—'-—‘ 1': észv/9 60013: f“ ’y w [éngMQA/jpa/e) 0 e . figllfihhfi) ken/m "251109. +- 9H (3“ 3 PEZII(/2g,+ r924 19) EM 1?: Mst W. Eisenstadt 4 ...
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This note was uploaded on 02/01/2012 for the course EEE 4306 taught by Professor Eisenstadt during the Fall '08 term at University of Florida.

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EEE4306_QUIZ__1_2011_Solution - EEE 4306 QUIZ 1, 100 Points...

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