B. Olson
ECE 207
Quiz 6
1) Assume that the switch is in position a for a long time. At time t=0 it moves from position a to
position b and at 2.5usec it moves from position b to position c. Determine
Homework 3
Problem 3: problem changed to match solution
Homework 4
Problem 1 phrase in problem removed. Did not make sense
Homework 4 Solutions
1/28/2013 6:12 PM
2/1/2013 9:09 AM
Problem 1 parts a and
B. OLSON
ECE 207
Homework 3
Inductors Power and Energy
1) The current through a 50uH inductor is described by the following equation:
iL ( t )
i L (t ) = 18te 10t
for t 0
50uH
+V
a)
b)
c)
d)
e)

Dete
B. OLSON
ECE 207
Homework4
Circuit containing inductors and switches
1) Assume iL6(0) = 1A and iL3(0) = 2A and that at t= 0 the voltage v(t) = 32te4t V is applied.
a. Determine iL3(t) for t>0
b. Det
B. OLSON
ECE 207
Homework 4 SOLUTIONS
Circuit containing multiple inductors and switches
1) Assume iL6(0) = 1A and iL3(0) = 2A and that at t= 0 the voltage v(t) = 32te4t V is applied.
V(t )
6H
3H
a.
B. OLSON
ECE 207
Homework5
Circuit containing capacitors and switches
1) Four capacitors are connected to a black box as shown at t = 0. The resulting current for t 0 is described
by:
io (t ) = 1.92e
B. OLSON
ECE 207
Homework 5
Recommendations for the problems that follow:
Look to replace Norton Equivalent Circuits with Thevenin Equivalent Circuits and vice versa
Combine components that are in ser
B. OLSON
ECE 207
Homework 5 SOLUTIONS
Circuit containing capacitors and switches
1) Four capacitors are connected to a black box as shown at t = 0. The resulting current for t 0 is described
by:
io (t
Fall 2017
ECE 207 Network Analysis I
A. Gonzalez
California State Polytechnic University, Pomona
Department of Electrical and Computer Engineering
Midterm Exam
October 25, 2017
Last Name:
First Name:
B. OLSON
ECE 207
Homework 3 SOLUTIONS
Inductors Power and Energy
1)
a) v = L
di
dt
[
]
di
= 18 t (10e 10t ) + e 10t = 18e 10t (1 10t )
dt
v = (50 10 6 )18e 10t (1 10t )
= .9e 10t (1 10t )mV t > 0
b) p
Ece 207
Homework 1
1) For the circuit shown below assume that the opamp amp is ideal and determine the following
a)
b)
c)
d)
Va
Vo
ia
io
50K
+
Va

ia
40K
10K
+6V
io

5K
25m V
+
30K Vo

+
6 V
2) Fo
Additional Homework Problems
a) For the circuits shown determine Qa, Qb, Qc, Qd and Qe.
b) The voltage, is applied to the capacitor.
c) Determine the charge Q+ as a function of time
d) Determine the c
Additional Inductor Problems
a) Determine the voltage across the inductor for the current shown.
i(t)
+
v(t)

500uH
b) The current through an inductor is i(t). Determine A and B if the voltage at t=0
B. OLSON
ECE 207
Homework1 solutions
1)
a)
b)
c)
d)
Vp = Vn = 0V
ip = in = 0
KCL at Vn
25mV Vn Va Vn
+
= in
(in = 0, Vp = Vn = 0)
5K
50 K
25mV
Va
+
=0
5K
50 K
Va = 250mV
KCL @ Va
Va Vn Va Va Vo
+
+
=0
B. OLSON
ECE 207 Midterm
100 Total Points
a) (17pts) For the circuit shown assume an ideal opamp. Determine Vo and Io.
1k
25V
4K
500
5K
2K
Vo
+
Io
10V
3K
2K
KCL at Vn=4V
KCL at Va=6V
Vo=7/4V
KCL at Vo
B OLSON
ECE 207
Homework 2
Introduction to Inductors
1) The current through and voltage across a 5H inductor are zero for t 0. Otherwise the voltage is described
by the graph shown. Determine expressi
Additional Capacitor Solutions
a) For the circuits shown determine Qa, Qb, Qc, Qd and Qe.
b) The voltage, is applied to the capacitor.
c) Determine the charge Q+ as a function of time
d) Determine the
Summary
Roots of Characteristic Equation:
2
s1 , s2 = 2 O
2
O < 2
over damped
2
2 O
2
O = 2
critically damped
2
2 O = 0
2
O > 2
under damped
2
2 O
Real
Imaginary
Helpful Homogeneous Solutions:
over
How to use PSPICE
I.
Launching PSpice
a. Launch Cadence:
School Version: Start Release 16.3 Design Entry CIS
Demo Version: Start Cadence OrCAD 16.5 Lite OrCAD Capture CIS Lite
b. School: From the Pop
Additional Inductor Problems
a) Determine the voltage across the inductor for the current shown.
i(t)
500uH
+
v(t)

b) The current through an inductor is i(t). Determine A and B if the voltage at t=0
PSpice Transient Simulation & Plotting Your Results
I.
Transient simulation with a Sinusoid
Start with the schematic shown below
Markers can be used to automatically plot simulation results after a si
Fall 2017
ECE 207 Network Analysis I
A. Gonzalez
California State Polytechnic University, Pomona
Department of Electrical and Computer Engineering
Homework 1 Solutions
Due: Saturday, October 7, 2017 b
Fall 2017
ECE 207 Lecture 6
A. Gonzalez
FirstOrder Circuits (Cont.)
Step Response of an RC Circuit
When the dc source of an RC circuit is suddenly applied, the voltage or current source can
be modele
Fall 2017
ECE 207 Lecture 4
A. Gonzalez
FirstOrder Circuits (Cont.)
The SourceFree RL Circuit
Consider the series connection of a resistor and an inductor, as shown in Figure 1. Our goal
is to deter
Fall 2017
ECE 207 Lecture 7
A. Gonzalez
FirstOrder Circuits (Cont.)
Step Response of an RL Circuit
Consider the RL circuit in Figure 1a which can be replaced by the circuit in Figure 1b.
t=0
R
R
+
Vs
Fall 2017
ECE 207 Lecture 2
A. Gonzalez
Capacitors and Inductors
Inductors
An inductor is a passive element designed to store energy in its magnetic field. Inductors
are use in:
Power supplies
Trans
Fall 2017
ECE 207 Lecture 1
A. Gonzalez
Capacitors and Inductors
Capacitors
A capacitor is a passive element designed to store energy in its electric field. Some important
facts about capacitors:
Cap
Fall 2017
ECE 207 Lecture 5
A. Gonzalez
FirstOrder Circuits (Cont.)
Singularity Functions
A basic understanding of singularity functions will help us make sense of the response of
firstorder circuit
Fall 2017
ECE 207 Lecture 3
A. Gonzalez
FirstOrder Circuits
The SourceFree RC Circuit
A sourcefree RC circuit occurs when its dc source is suddenly disconnected. The energy
already stored in the ca