This preview shows pages 1–6. Sign up to view the full content.
Final Exam, ECE 137A
Wednesday March 16, 2005
811 AM
Name: __________________________
Closed Book Exam: Class CribSheet and 3 pages (6 surfaces) of student notes permitted
Do not open this exam until instructed to do so.
Use any and all reasonable
approximations (5% accuracy),
.
Show your work:
Full credit will not be given for correct answers if supporting work is missing.
Good luck
Time function
LaPlace Transform
δ
(t)
1
U(t)
1/s
e
−
α
t
U
(
t
)
1
s
+
e
−
t
cos
ω
d
t
(
)
U
(
t
)
s
+
s
+
(
)
2
+
d
2
e
−
t
sin
d
t
(
)
U
(
t
)
d
s
+
(
)
2
+
d
2
Part
Points
Received
Points
Possible
Part
Points
Received
Points
Possible
1a
15
3a
5
1b
10
3b
8
2a
1
3c
12
2b
2
4a
7
2c
2
4b
7
2d
12
4c
5
2e
8
4d
6
TOTAL
100
1
a
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document Problem 1, 25
points
Nodal analysis
R
1
R
2
R
3
V
in
V
out
Q
1
You will be working on the circuit to the
left.
Ignore DC bias analysis. You don’t need it.
The transistor has transconductance gm1.
Its drainsource resistances Rds1 is infinity.
Part a, 15
points
Draw a smallsignal equivalent circuit of the circuit
2
a
3
a
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document Part b,10 points
Find, by nodal analysis, a smallsignal expression
for:
Vout/Vin= __________________
4
a
5
a
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 08/06/2008 for the course ECE 137AB taught by Professor Rodwell during the Winter '08 term at UCSB.
 Winter '08
 RODWELL

Click to edit the document details