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I pledge on my honor that I did not copy any of this exam, and that this work is entirely my own. Furthermore, I did not use PSpice during this exam.
Problem 1 (25 Points):
Source i (^) in is a small signal ac current source. Find the bias values of VCE and Vx. Assume that V (^) BE = 0. V and β = 100. Do not ignore base currents.
Q R 30k
5V V
2k R
RC 3k
I2 1mA
-VEE = -15 V
VCC = 15 V
Vx
C
C
RL
Vo
i (^) in C
Problem 2 (25 Points):
Assume β = 100. Calculate a numerical value for the gain vo/i (^) in.
Q R 30k
5V V
2k R
RC 3k
I2 1mA
-VEE = -15 V
VCC = 15 V
Vx
C
C
3k RL
Vo
i C in
Problem 4: (25 Points)
A new diode has been discovered with the properties shown below:
Where ܫௗ ൌ ൜
ܸሺߩ^ ௗ ሻଵ.ହ ݂^ ܸ ݎ ௗ 0
a) In the circuit below, bias the diode so that the diode voltage Vd is 5 V. Use ρ = 0.001 A/V 1.5^. ( points)
b) Using the value for of R 5 determined in part a, find a numerical value for the small signal voltage gain v (^) o /vin. (18 Points)
R
D
L R
1k
Vin
VCC = 15 V
Vo
I (^) d Vd
