EE4609
Homework #7
Spring 2009
1) Determine the ABCD parameters for the circuit given below
L
R
C
2) Consider two symmetrical stripline signal conductors running
parallel to each other
w
s
b
r
where b = 10 mils, w = 4 mils and r = 4.
The even and odd char
Department of Electrical and Computer Engineering
University of Minnesota
EE 4609 Digital Signal Integrity
Credits: 3
Time: 7:15 8:15 am Tues and Thurs
Office Hours: by arrangement
Prerequisites: EE3015 (S) Signals and Systems
Instructor: Bob Sainati
Emai
EE4609
Spring 2009
Homework #1
1) A 3 GHz clock signal is sent down an interconnect where the signal velocity is the
speed of light in a vacuum (3 x 108 m/s). Using the risetime approximation discussed in
section 1-7, determine the maximum interconnect le
EE4609 Homework #6
Spring 2009
1) (a) A driver generates a trapezoidal clock signal and sends it down an
interconnect to a load. The equivalent circuit is shown below.
Rs = Zo
Zo,
Vg
Zin
Rs = 9Zo
l
At the first harmonic of the clock signal, the line leng
EE4609
Spring 2009
Homework #4
1) A driver is connected to two receivers via transmission lines. The circuit is shown
below.
Line 2
RS = Zo
VS(t)
2Zo, td1
+
VL2
/4 -
RL2 = Zo
Zo, td1
Line 1
2Zo, td1/4
Line 3
RL3 =
The driver voltage is a step voltage giv
EE4609
Spring 2009
Homework #3
1) Consider an interconnect comprised of a driver as represented by a Thevinen
equivalent circuit, a transmission line and receiver as shown below.
RS = 3Zo
Zo, td
VS(t)
RL = 9Zo
The driver voltage is a step voltage
0 for t
EE4609
Spring 2009
Homework #2
1) Consider an infinitely long coaxial cable. The center conductor has an outside
radius of a (m). The outer conductor has an inside radius of b (m). The area in
between the conductors is filled with a dielectric with relati
EE4609 Spring 2009
Homework #5
1) (a) For the parallel end termination
Vdd
RA
RA
RL = Z o
C
calculate the power dissipation (W) and current draw (A) when holding a logic high
(as shown in above circuit) and the power dissipation (W) and current draw (A)
w
Review: Fermi Level (Equilibrium)
Ec EF Ei Ev
n0 p0 = n2 = 1020 /cm3 i
n0 = ni e
(EF Ei )/kT
p0 = ni e(Ei EF )/kT
n0 EF Ei = kT ln ni p0 Ei EF = kT ln ni
n0 (cm-3) p0 (cm-3) EF - Ei (eV)
1011
1012
1013
1014
1015
0.026 ln10 = 0.06
0.026 ln102 = 0.06x2 42
E
EE 3161 Spring 2010 Homework #1 (100 Points) Assigned on Monday 2/1; Due: Wednesday 2/10 (in class) 1. Pierret Problem 1.10 (Direction on wafer surface) (20 pts)
2. Pierret Problem 2.6 (Fermi function questions) (40 pts)
3. Pierret Problem 2.12 (Hypotheti