2004 University of Illinois at Chicago ECE 340 V. Goncharoff
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ECE 340 - Electronics I
Homework #4
(Write answers only in the space provided, but show
all work on pages stapled to this cover sheet.)
1. Refer to the circuit on the right:
a) Assuming that transistor 7.0
=
BE
v volts and 1
=
α
(0
=
B
I), what is the
value of C
i?C
i = ____________
b) Assuming that transistor 7.0
=
BE
v volts and 98.0
=
α
, what is the value
of C
i?C
i = ____________
c) What is the highest value of B
v for which the transistor will be in its active
mode of operation? Assume 7.0
=
BE
v volts and 1
=
α
.
(max)
BE
v = ____________
d) Repeat 1(c) with the assumption that 100
=
β
.
(max)
BE
v = ____________
e) With the assumption that 1
=
α
, calculate the amount of power being
dissipated in C
R, E
R, and the BJT:
C
R
P = _________ , E
R
P = _________ , BJT
P = __________.
2 KΩ
2 K Ω
6 V
+
3 V
+
