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Solution%20-%20Exam%20_2

# Solution%20-%20Exam%20_2 - ECE334 EXAM 2 SHOW ALL YOUR...

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Unformatted text preview: ECE334 EXAM 2 SHOW ALL YOUR EFFORT All exams are closed book, closed note. Each student is allowed to bring into the exam 3 single 8.5” X 11" piece of paper, which can have text on both sides, and a calculator. NAME: 40 Wow (vDD = 10v, VG : 5»: kn'cwmkoszvzs Vm = 1V: VA - W) Va; =w HIV/t) = w «A/v’ VmZV¢-'Vm:?‘l:4" I l l i 1. (15) Find the maximum RD that keeps the transistor in saturation region. Von RU ->\/ “H! r b _, J. ‘- VG —| In: iln[%)(‘/65”vﬁrj ID“ 1X0-IX'f- " “Jamil ...L. i - " _:_xa.uref ~l-(n/l ,QD: ’0 : ark-'2.— T . of... :- 5! 479'KvQ. 2. (15) Find the operating region of the transistor. (kn'OV/L)=2mA/V2, VA=OO , Vth=1V, No credit Without justiﬁcation.) 10V V9,: V65: 5K x lull “All 1mA :: {fay-3 Vat : V69 .. ‘1' <‘ V65 —'l V3k9 < V65 - l = V5;— Vu. ﬂ Vbs < V65 _. VH1 Va, :9 V»; < V65 ‘Vut M T Linea: 3. (15) Fill out the blank when the DC bias current (ID) is increased from I to 21. (Assume that the transistor is working under saturation region. No credit without explanation. ) magma.) —- 41 Overdrive voltage a. x V. v Nov“ = VGS “V110 Transconductance 1 1 3M 73 x a 1),: Tg-rt,+ £54, ’lr: ’l’f‘ﬂm‘Vas r(7’5= "’95) : (”frigid I Vi JIYo(i‘+3mES)T253;|# ’1} ka 5 j"; 33 gs‘l’Y‘iJI-l'gmﬂs) [J2] 4. (15) Derive the output rcsitance (Ram) of the following circuit using small signal equivalent circuit. (VA #0) 5. The following circuit operates with I = 1m, VDD = 5V, V53 = -5V, R3 = ZkQ, RL = ZkQ, Vi: 1V, and [VAI = or: 1) (10) Calculate the transconductance (gm) of the transistor. Von ”0 2535le I “a V5: I'Rss +Vss : RL Ru :2—§:~3v’ 5:3—e: TV: Ur mg“ V65=2v Rs 00 A"Lb 2/“, x N am m: M_ 3...; We ' r WV 3—; 2‘, VSS link/V “1V .2 mA/y 2) (10) Calculate the input resistance R (No credit without small signal analysis.) ) R4: "3“” ll R5 : lK IlJK : 0.67sz 3) (10) Calculate the output resistance R0(No credit without small signal analysis.) 015‘? ”3-K- : 0&8 )0), ...
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