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EE—331 Devices and Circuits I Instructor: Tani—Chang Chen Midterm #2 Name; ‘ Student Number:
m 02:3003:20pm 11/23/2009 Problem 1: [20 points} In each of the idealdiode circuits shown below, V, is a 1kHz, 10V peak
triangular wave. Sketch the waveform resulting at V0. What are its positive and negative peak
values? [A; 10 points] 01
VI D2 [3; 10 points} +15V 1 mA
V0 1 kn
D1 02
VI minen Vin>0. D; 0?? DZ 0“ Voxiv,. when Vim“). view “02%? Vo=V1n+iV Problem 2: [20 points] Consider a halfwave peak rectifier fed with a voltage Vs having a
triangular waveform with 20 V peaktopeak amplitude, zero average, and 1 kHz frequency.
Assume that the diode has a 0.7 V drop when conducting. The load resistance R = 1009 and the filter capacitor C = 100 pF. [A; 5 points] Sketch the waveform resulting at V0. What are its positive and negative peak
values? [8; 8 points} Find the ripple voltage Vr? _ (V “Von” T __l_ n. l
\lr—“—P—P~—” a T'f‘tboo
_ ' own“ I '
“2—” 3') FLT“ 0w“ ~_ one v,
[00 “)qu [C; 7 points] Calculate the time interval during which the diode conducts. Problem 3: Biasing MOSFETanalysis [30 points]
Consider the MOSFET M1 and M2 shown in the circuit below has the following parameters:
{VTO = VI KnJ = W1 = 8 pm, L1 = L2 = “In, A. =0, 'Y = 0.53/1”, and 2¢F = VDD = VDD =
+3 V +3 V (a) Find the value of R required establishing a current of 0.2 mA in M1. [15 points] M i : Sa‘lvwaﬁiw : r 235)“ la 1
up: 2" H m I
"~72 zxiows h 7.
0 ﬂ M“ = 2 L “as “\fm) \fw =°~ (b) Find W2 and R2 so that M2 operates in the triode region with in = 0.2 mA and low output Vo =
0.25V. [15 points] ’U‘mszlm t; v. LM '2), x : ‘a3_ «~4— LUz "Ups
\ v a}. x10  2‘10 ( L9. ) L ’U'cxsrvw “‘7 313% 3 W; =5 qsgq‘Mm. ‘l‘zl;
{Zn—Lumzi'éQkﬁm
Z Ou'LMljs 7 ...
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This note was uploaded on 12/13/2009 for the course EE 331 taught by Professor Donthavemyschool during the Spring '09 term at Vermont Tech.
 Spring '09
 donthavemyschool

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