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. The solution is correct but the first lines are mis
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 = iv
v( 200m sec) = .9e 2 m(1 2)m = 121.8uV
i (200m se
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) For the circuit shown assume that the opamp is ideal and
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 an expression for the
current through the inductor for
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 simulation has run
a.
Place Markers using the place marke
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 is .25V.
i(t)
50mH
v(t)
+
At t=0 (equating the two cu
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 Popup Menu select:
Studio Selection Suite: PCB Design CIS
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 damped
y H (t) = D1e s1t + D2 e s2t
critically damped
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 current i(t)
e) The capacitor shown is initially charg
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 expressions for the current for the following intervals: 0 t 1;
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
2K
b)
c)
d)
e)
For the circuit shown
Determine the ene
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
( Vp = Vn = 0)
50 K
10 K
40 K
Va
Va Va Vo
+
+
=0
50 K
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 is .25V.
i(t)
v(t)
+
50mH
c) Assume i(t) is applied t
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 current i(t)
e) The capacitor shown is initially charged
B OLSON
ECE 207
Homework 2  SOLUTIONS
Introduction to Inductors
1)
0 t 1sec
v = 100t
1
1
t 2
100t dt + i (0) = 100t dt + 0 = 20 = 10t 2
5
50
2
0
t
i (t ) =
t
1 t 3 sec
v = 200 + 100t
i (1) = 10 (using results from previous time interval)
t
i (t ) =
t
1
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)

Determine an expression for the voltage across the inductor
Chapter 8
Natural and Step Responses of
RLC Circuits
8.12 The Natural Response of a Parallel RLC
Circuit
8.3
The Step Response of a Parallel RLC
Circuit
8.4
The Natural and Step Response of a
Series RLC Circuit
1
Key points
What do the response curves of
ECE 207 Spring 2016
Dr. Chandra
TA: Adrian Gonzalez
Computer Assignment #1
Instructions: Computer Assignment is a formal report (typed). Create a .pdf file and upload it
to Blackboard. Name the file as JohnDoeECE207LCA1.pdf where John and Doe is replaced
Fundamentals of Electric Circuits
(EE201)
Chap 6: Capacitors and
Inductors
By
Dr. Eng. Omar AbdelGaber M. Aly
omar.aly@aun.edu.eg
Assistant Professor
Electrical Engineering Department
College of Engineering AlMajmaa
AlMajmaa University
CAPACITORS
The c
ECE 207 Spring 2016
Dr. Chandra
TA: Adrian Gonzalez
Computer Assignment #3
Instructions: Computer Assignment is a formal report and it must be typed. Create a .pdf file and
upload it to Blackboard. Name the file as JohnDoeECE207LCA1.pdf where John and Doe
ECE 207
ECE 207
Network Analysis I
Capacitors
Z. Aliyazicioglu
Electrical and Computer Engineering Department
Cal Poly Pomona
Capacitor
A capacitor is a passive element designed to store energy in
the electric field.
A capacitor consists of two conductor
ECE 207 Spring 2016
Dr. Chandra
TA: Adrian Gonzalez
Computer Assignment #3
Instructions: Computer Assignment is a formal report and it must be typed. Create a .pdf file and
upload it to Blackboard. Name the file as JohnDoeECE207LCA1.pdf where John and Doe
EENG223: CIRCUIT THEORY I
DC Circuits:
Capacitors and Inductors
Hasan Demirel
EENG223: CIRCUIT THEORY I
Capacitors and Inductors: Introduction
Introduction
Capacitors
Series and Parallel Capacitors
Inductors
Series and Parallel Inductors
EENG223: CIR
ECE 207 Spring 2016
Dr. Chandra
TA: Adrian Gonzalez
Computer Assignment #1
Instructions: Computer Assignment is a formal report (typed). Create a .pdf file and upload it
to Blackboard. Name the file as JohnDoeECE207LCA1.pdf where John and Doe is replaced
2012/10/24
SecondOrder Circuits
Introduction
Finding Initial and Final Values
The SourceFree Series RLC Circuit
The SourceFree Parallel RLC Circuit
Step Response of a Series RLC Circuit
Step Response of a Parallel RLC Circuit
General SecondOrder Circu
RC (ResistorCapacitor)
Circuits
AP Physics C
RC Circuit Initial Conditions
An RC circuit is one where you have a capacitor
and resistor in the same circuit.
Suppose we have the following circuit:
Initially, the capacitor is UNCHARGED (q = 0) and the curr
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