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(ELEC202)ee202_03_pass_mt1_ans.pdf
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THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING

Elec 202 Philip Mok
ELECTRONIC CIRCUITS II
Fall 2003 Room 2440
MID-TERM #1 (ANSWERS)
(1)
(a) RE = 811 .

(b) forced = 7.4; overdrive factor = 2.7

(2)
(a) IC1 = 4.3 mA; IC2 = 3.6mA

(b)
gm1 = 0.165 A/V; gm2 = 0.139 A/V
r1 = 121 .;r2 = 144 .
re1 = 5.76 .; re2 = 6.88 .
ro1 = 4.65 k.; ro2 = 5.56 k.


(c)
Ri = 5.03 k.; Ro = 926 .; vo/vi = .26.7 V/V



(3)
(a) IC = 0.358 mA; VX = 1.24 V


(b) Ri = 1.27 k.; Ro = 6.67 k.; vo/vi = .55.1 V/V; io/ii = .6.99 A/A
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