ELEC l 61
MIDTERM EXAM
Joshua R. lohnson
i. With the help or sketches. explain theoperation of a Class AB amplifier.
Bias QN and Qp into slight conduction when Vi=0: in=ip.
Ideally ON and Qp are: -> *matched (unlikely with discrete transistors and challen
ELEC 161
MID-TERM EXAM
Joshua R. Johnson
1. With the help of sketches, explain the operation of a Class AB amplifier.
Bias QN and QP into slight conduction when vI=0: iN=iP.
Ideally QN and QP are: *matched (unlikely with discrete transistors and challengi
ELEC161 Electronics II
M4 Lab: Op Amp Applications Comparators, Integrators, and Differentiators
Introduction
In this experiment, we will explore additional common applications of Operational Amplifiers
characterized by their multiple inputs and single ou
ELEC 161
QUIZ 2
Joshua R. Johnson
1. Calculate the efficiency of a transformer-coupled class A amplifier for a supply of
12 V and an output VP=9 V. Show your calculations.
V out
100
V dc
%=
( )
%=
9V
( 12V
)100
%=75
2. With the help of sketches, explain t
ELEC161 Electronics II
M1 Lab: Basic Circuits based on Operational Amplifiers
Introduction
The purpose of this lab is to re-familiarize ourselves with MultiSim its basic operation of
components and instrumentation. We will use Operational Amplifiers as th
ELEC161 Electronics II
M3 Lab: Op Amp Applications Adding and Subtracting Voltages
Introduction
In this experiment, we will explore two applications of Operational Amplifiers characterized by
their multiple inputs and single output. These two opamps are c
ELEC 161, Textbook Problems
Student Name: Joshua R. Johnson
Assignment: M4Al
Ch. 13, Problems. 2,. 4, 7, and-9
2. Sketch the output waveform for the circuit of Fig. 13.40.
The power supply is connected to the inverting terminal of the op-amp. So, the outp
ELEC161 Electronics II
M2 Lab: Ideal vs. Real Operational Amplifiers
Introduction
The purpose of this lab is to identify a real Operational Amplifier as opposed to the Ideal
Operational Amplifier. It will show the different parameters that make Operationa
2'. What is a voltage buffer? How does it work? Draw a sketch to show how you will
use voltage buffers to provide two separate outputs from one input signal.
A voltage buffer is a circuit that copies the input voltage to the output. This is done
mainly fo
Differentiator
We have
Ci =
i=
2
dv
=c
t
dt
dV
dt
V out =i R f =R f Ci
If
dV
dt
V =V D sint (sinusoidal input)
V out =R f C i V o cost
V out =R f C i V o cost
Clearly Vout increases with an increase in , i.e. the amplitude increases with increasing freque
ELEC 161
QUIZ 1
Joshua R. Johnson
1. Design a summing amplifier based on a 741 lC chip. The amplifier has Rf=l MQ,
R1=l 00 k0, R2=SO kQ, and R3=l 0 k0. The input voltages are Vl=] 00 mV sin (ZOOOt),
Vz=150 mV sin (300070, and V3=200 mV sin (l 0000. Draw t
ELEC 161, Textbook Problems
Student Name: Joshua R. Johnson
Assignment:
M3A2
Ch. 12, Problems 16, 23, and 25
16.
a.
For the class B power amplifier of Fig. 12.36, calculate:
Maximum Po(ac).
2
P o=
VL
2 RL
(30 V )2
P o=
2(8 )
P o=
900
16
Po=56.25 W
b.
Maxi
ELEC 161, Textbook Problems
Student Name: Joshua R. Johnson
Assignment:
M4A1
Ch. 13, Problems 2, 4, 7, and 9
2.
Sketch the output waveform for the circuit of Fig. 13.40.
The power supply is connected to the inverting terminal of the op-amp. So, the output
ELEC 161
QUIZ 2
Joshua R. Johnson
1. Calculate the efficiency of a transformer-coupled class A amplifier for a supply of
12 V and an output VP=9 V. Show your calculations.
V out
100
V dc
%=
( )
%=
9V
( 12V
)100
%=75
2. With the help of sketches, explain t
ELEC 5i.
QUIZ l
joshua R. johnson
1. Design a summing amplifier based on a 741 IC chip. The amplifier has Rf=i MO,
R1=lOO k0, R2=50 k0, and R3=i 0 k9. The input voltages are V1=i 00 mV sin (ZOOOt),
V2=l 50 mV sin(3000t), and V3=200 mV sin (i 0000. Draw th
ELEC 161, Textbook Problems
Student Name: Joshua R. Johnson
Assignment:
M3A1
Ch. 12, Problems 5, 7, and 12
5.
A class A transformer-coupled amplifier uses a 25:1 transformer to drive a 4 load. Calculate
the effective AC load (seen by the transistor connec
ELEC 161, Textbook Problems
Student Name: Joshua R. Johnson
Assignment:
M2A1
Ch. 11, Problems 3, 7, and 11
3.
Calculate the output voltage in the circuit of Fig. 11.49.
The stage 1 of the multi-stage is non-inverting stage. Stages 2 and 3 are the invertin
ELEC 161, Textbook Problems
Student Name: Joshua R. Johnson
Assignment:
M1A2
Ch. 10, Problems 16, 17, and 18
16.
Calculate the total offset voltage for the circuit of Fig. 10.75 for an op-amp with specified
values of input offset voltage VIO=6 mV and inpu
4. Caicuiate the cutoff frequency of a firstorder low pass filter having R1 =3.4 kit and
Ci=0.0i uF. Show your calculations and draw a sketch of this low pass active filter.
A simple lowpass active filter (RCfilter) circuit as shown:
Apply KCL at node a o
ELEC 161, Textbook Problems
Student Name: Joshua R. Johnson
Assignment:
M1A1
Ch. 10, Problems 3, 11, and 12
3.
What input voltage results in an output of 2 V in the circuit of Fig. 10.64?
V o=
Rf
(V )
R1 1
V 1=
R 1
(V o )
Rf
V 1=
20 k
(2 V )
1 M
3
V 1=(20
ELEC 161, Textbook Problems
Student Name; Joshua R. Johnson
Assignment: MZAi
Ch. 11, Problems. 3-,: 7,. and 11
3. Calculate the output voltage in the circuit of Fig. 11.49.
The stage 1 of the multi-stage is non-inverting stage. Stages 2 and 3 are the inve
ELEC 161, Textbook Problems
Student Name: Joshua R. Johnson
Assignment:
M2A2
Ch. 11, Problems 13, 15, and 16
13.
Calculate the output current Io in the circuit of Fig. 11.55.
Output voltage at pin 6 is identified through equation:
V o=I o RS
Amplifier gai
ELEC 161
MID-TERM EXAM
All the questions carry same weight
1. With the help of sketches, explain the operation of a Class AB amplifier.
2. Design a summing amplifier based on a 741 IC chip. The amplifier has Rf = 500 K, R1 = 50 K, and
R 2 = 25 K. The inpu
QUIZ 1
Version 3
Answer the following questions. Show your work clearly.
1. How is 127 decimal represented in 8-bit 2s complement notation?
2. Solve the following problem:
(1000)2
x (0011)2
3. Solve the following problem:
(00110110)2
- (00011111)2
4. Solv
ELEC 331 Digital and Analog Communications
Lab Report Format
Course: ELEC331 Digital and Analog Communications
Section:
Name: Maci Ferguson
Instructor Name: Sohail Anwar, Ph.D
_
Title: M3A2 Lab: FM Signals
_
Abstract:
VisSim/Comm was used in this lab to s
ELEC 331 Digital and analog Communications
Assignment Solutions Format
Use the following template to develop the assignment solution:
Course: ELEC331 Digital and Analog Communications
Section:
Name: Maci Ferguson
Instructor Name: Sohail Anwar, Ph.D
_
Assi
QUIZ 3
Version 3
Question 1:
Develop the truth table for the following Boolean expression:
X A B C
Question 2:
Simplify the Boolean expression given as:
X AB A AC
Question 3:
Develop a logic diagram to implement the following Boolean expression:
X B C DE
QUIZ 4
Version 3
Question 1:
A Parallel-in/Serial-out shift register is loaded initially with 0100. What will the register contain
after two clock pulses if the serial input is HIGH?
Clock 1 1010
Clock 2 1101
Question 2:
What are the four operating modes
Mid-Term Exam
Version 3
Note: All the questions carry equal weight.
Question 1:
Simplify the following Boolean expression:
Y AB AC BC
= (A + B + A + C) BC
=ABC
Question 2:
How many two-input NAND gates are in a 14-pin DIP integrated circuit?
Vcc
GND
Vcc
Q
QUIZ 5
Version 3
Question 1:
What is the maximum numerical value out of a binary counter having 6 flip-flops?
6
2 =64, due recycle the max number is 63
Question 2:
How many flip-flops are needed to construct a counter which counts from 0 to 19?
5
2 =trunc