ECE 361
Homework VI Solution
Hint: some of the designs may require the use of more than one OpAmp.
1. Design an Op-Amp circuit with a voltage gain of 5 and input
impedance of 10 k.
A Solution:
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University of Massachusetts at Amherst
ECE 361 EXAM #1 - Fall 2016
- PRACTICE EXAM -NAME:_
Instructions:
This is a 50 minute closed-book, closed-notes exam. You may use one double-sided sheet of
note
Problem 1. A given npn transistor has P = lOO, ls = SOA, and lc = 3mA. Based on this
information, determine the region of operation (10 points)
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University of Massachusetts at Amherst
ECE 361 EXAM #1 - Fall 2016
- PRACTICE EXAM -
NAME: SOL-U 7 ()10
Instructions:
' This is a 50 minute closedbook, closed-notes exam. You may use one double~sided
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of the base resistor Rain the transistor circuit shown. The npn transistor In this
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1)P=4*.03=.12W
.12J/s
4V*5kJ=20 KJ
T=20KJ/.12=46.3 hrs
C.
2) 4V out of the op amp -> 2V over the LED
V/R=13mA
A
3) Voltage divider problem
VB=4*5/(10+5)
=1.33 V
C
4) (15+15)^-1 +(25+25)^-1=20
B
5) i=(
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ECE 361
Fundamentals of Electrical
Engineering
University of
Massachusetts at
Amherst
Fall 2017
Professor
McLaughlin
Lecture #2
9/8/17
Announcements
Reminder: HW#1 is posted. Due Wednesday
9/13/17
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ECE 361 Fall 2010
Exam I
The exam format is, closed book, closed notes, calculators allowed, no
computers. Cell phones are not to be visible. Of the ten problems, compete
seven of your choice. I will
ECE 361 Fall 2010 Exam II
Name
.
Choose to answer problem 1 or 2, then answer all of the remaining.
1. For the circuit below the switch closes at t = 0. The source V is DC
(V(t) = V0). Find the expres
Exam III Practice Problems
Note: These problems are additional material and in no way are an
example of the entire exam. You are still responsible for the concepts
covered in homeworks VI & VII and qu
ECE 361
Homework VI
Hint: some of the designs may require the use of more than one OpAmp.
1. Design an Op-Amp circuit with a voltage gain of 5 and input
impedance of 10 k.
2. Design an Op-Amp circuit
ECE 361 LaPlace Notes
Definition of the Laplace Transform
L [f[t] = f [ s] = f [t ]e st dt
0
Assumptions:
1. f[t] = 0 for t < 0
2. we = wm = 0 at t = 0
Useful properties of the Laplace Transform
Linea
ECE 361 Fall 2011
Homework V
1. Find the transfer function between the voltage source, V(t), and the
inductor current, I(t), for the circuit below.
R1
I(t)
+
L1
V(t)
R2
Solution: By KCL the current th
ECE 361 Fall 2011
Homework I Solutions
1. 1.36
ia = -ib = -2A
ic 3A + ib = 0 -> ic = 1A
id ie 3A = 0 -> id = 4A
2. 1.37
ic ib + ia = 0 -> ic = 1A
if id ia = 0 -> if = -3A
ic ie + ih = 0 -> ie = 5A
ig
ECE 361 Fall 2011
Homework III Solutions
1. You have five resistors connected in parallel with values of 1, 2, 3, 4, and
5. The current through the 1 resistor is 1A.
a) What is the current through the
ECE 361 Fall 2011
Homework IV Solutions
1. For the circuit below, VC(0)=10V and the switch closes at t = 0.
Find when VC = 5V.
VC
+
C
10k
Solution: With the switch closed we can write a KCL equation f
Solutions to RC and RL circuits with inductor networks
Example One
Consider the circuit of Figure One with the switch opening at t=0.
R1
U1
I1(t)
+
I3
L1
V0
I3
R2
L2
Figure One
We seek the function I1
ECE361
Fall 2016
Team Members:
Team Number:
Team Name:
Mentor Name:
Lab Assignment #1
What to Submit: Each group member is to complete this form, filling in the information in the
locations provided,
University of Massachusetts Amherst Department of Electrical and Computer Engineering ECE 361 Fundamentals of Electrical Engineering Spring, 2008 Handout #6 - Natural Responses of RC- and RL-Circuits