For more classes visit
www.snaptutorial.com
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
3. Convert 126 x 10+2 to scientific and engineering notations.
4. Make the following conversions:
a. Convert 0.34 seconds to milliseconds.
DESIGN OF CIRCUIT DEBITS THE GIVEN VALUE TO THE DEFAULT VALUE WITH COST ANAL...sanjay kumar pediredla
THIS REPORT IS BASED ON THE DESIGN OF CIRCUIT DEBITS THE GIVEN VALUE TO THE DEFAULT VALUE WITH COST ANALYSIS AND DEBIT RANGE IS (0-7) AND DEFAULT VALUE “11". AND BY SEEING THIS REPORT WE CAN GET A IDEA ABOUT THE ELECTRONIC CIRCUITS HOW TO DESIGN THE CIRCUITS AND BY USING THE COSTING TECHNIQUES WE CAN KNOW ABOUT HOW TO DESIGN THE CIRCUITS BY LOW-COST ANALYSIS SO IN THIS REPORT WE CAN SEE THAT THE COST ANALYSIS OF THE IC'S ALSO SO THIS REPORT IS ALSO USEFUL FOR THE ENGINEERING STUDENTS THOSE WHO ARE DESIGNING THE CIRCUITS AND HOW TO DO THE COSTING ANALYSIS ON THE CIRCUITS
Digital electronics(EC8392) unit- 1-Sesha Vidhya S/ ASP/ECE/RMKCETSeshaVidhyaS
Number systems, Number conversion,Logic Gates,Boolean Theorem and Laws,Boolean Simplification,NAND,NOR Implementation,K-MAP simplification and Tabulation Method
DESIGN OF CIRCUIT DEBITS THE GIVEN VALUE TO THE DEFAULT VALUE WITH COST ANAL...sanjay kumar pediredla
THIS REPORT IS BASED ON THE DESIGN OF CIRCUIT DEBITS THE GIVEN VALUE TO THE DEFAULT VALUE WITH COST ANALYSIS AND DEBIT RANGE IS (0-7) AND DEFAULT VALUE “11". AND BY SEEING THIS REPORT WE CAN GET A IDEA ABOUT THE ELECTRONIC CIRCUITS HOW TO DESIGN THE CIRCUITS AND BY USING THE COSTING TECHNIQUES WE CAN KNOW ABOUT HOW TO DESIGN THE CIRCUITS BY LOW-COST ANALYSIS SO IN THIS REPORT WE CAN SEE THAT THE COST ANALYSIS OF THE IC'S ALSO SO THIS REPORT IS ALSO USEFUL FOR THE ENGINEERING STUDENTS THOSE WHO ARE DESIGNING THE CIRCUITS AND HOW TO DO THE COSTING ANALYSIS ON THE CIRCUITS
Digital electronics(EC8392) unit- 1-Sesha Vidhya S/ ASP/ECE/RMKCETSeshaVidhyaS
Number systems, Number conversion,Logic Gates,Boolean Theorem and Laws,Boolean Simplification,NAND,NOR Implementation,K-MAP simplification and Tabulation Method
For more course tutorials visit
www.newtonhelp.com
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
For more course tutorials visit
www.newtonhelp.com
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
For more course tutorials visit
www.newtonhelp.com
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
For more course tutorials visit
www.newtonhelp.com
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
Ecet 105 Education is Power/newtonhelp.comamaranthbeg80
For more course tutorials visit
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Mission Statement. For your Final Project, you will be creating a presentation to use as a recruiting tool to attract the best and brightest educators to your (real or fictional) early childhood development center. As a first step, this week you will craft a mission statement for your center.
Using the information given in Chapter 3 of your text and the NAEYC Code of Ethical Conduct: Supplement for Early Childhood Adult Educators, write a paper that articulates your personal purpose, vision, and mission
Ecet 105 Enthusiastic Study / snaptutorial.comStephenson38
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
3. Convert 126 x 10+2 to scientific and engineering notations.
4. Make the following conversions:
a. Convert 0.34 seconds to milliseconds.
For more classes visit
www.snaptutorial.com
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
3. Convert 126 x 10+2 to scientific and engineering notations.
4. Make the following conversions:
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
3. Convert 126 x 10+2 to scientific and engineering notations.
4. Make the following conversions:
a. Convert 0.34 seconds to milliseconds.
For more classes visit
www.snaptutorial.com
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
Ecet 105 Effective Communication - snaptutorial.comHarrisGeorg14
. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
3. Convert 126 x 10+2 to scientific and engineering notations.
4. Make the following conversions:
a. Convert 0.34 seconds to milliseconds
1. Develop the Boolean equation for the circuit shown below
2. Determine the output Y in Problem 1 for the input values shown below
3. Redraw the circuit in Problem 1 using only 2-input NAND gates
4.Develop the Boolean equation for the circuit shown below
5.Determine the period of a clock waveform whose frequency is:
6.Write the VHDL text file (Entity and Architecture) for a 2-input NAND gate.
For more classes visit
www.snaptutorial.com
1. Develop the Boolean equation for the circuit shown below
2. Determine the output Y in Problem 1 for the input values shown below
3. Redraw the circuit in Problem 1 using only 2-input NAND gates
4.Develop the Boolean equation for the circuit shown below
5.Determine the period of a clock waveform whose frequency is:
For more classes visit
www.snaptutorial.com
1. Develop the Boolean equation for the circuit shown below
2. Determine the output Y in Problem 1 for the input values shown below
3. Redraw the circuit in Problem 1 using only 2-input NAND gates
4.Develop the Boolean equation for the circuit shown below
Ecet 230 Enthusiastic Study / snaptutorial.comStephenson39
1. Develop the Boolean equation for the circuit shown below
2. Determine the output Y in Problem 1 for the input values shown below
3. Redraw the circuit in Problem 1 using only 2-input NAND gates
4.Develop the Boolean equation for the circuit shown below
5.Determine the period of a clock waveform whose frequency is:
For more course tutorials visit
www.newtonhelp.com
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
For more course tutorials visit www.newtonhelp.com
Chapter 2 Homework
1)A discrete 120 V ac output module is to be used to control a 230 V dc solenoid valve. Draw a diagram showing how this could be accomplished using an interposing relay.
2)Assume a thermocouple generates a linear voltage of from 20 mV to 50 mV when the temperature changes from 750°F to 1250°F. How much voltage will be generated when
Acetabularia Information For Class 9 .docxvaibhavrinwa19
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Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
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For more course tutorials visit
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1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
For more course tutorials visit
www.newtonhelp.com
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
For more course tutorials visit
www.newtonhelp.com
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
For more course tutorials visit
www.newtonhelp.com
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
Ecet 105 Education is Power/newtonhelp.comamaranthbeg80
For more course tutorials visit
www.newtonhelp.com
Mission Statement. For your Final Project, you will be creating a presentation to use as a recruiting tool to attract the best and brightest educators to your (real or fictional) early childhood development center. As a first step, this week you will craft a mission statement for your center.
Using the information given in Chapter 3 of your text and the NAEYC Code of Ethical Conduct: Supplement for Early Childhood Adult Educators, write a paper that articulates your personal purpose, vision, and mission
Ecet 105 Enthusiastic Study / snaptutorial.comStephenson38
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
3. Convert 126 x 10+2 to scientific and engineering notations.
4. Make the following conversions:
a. Convert 0.34 seconds to milliseconds.
For more classes visit
www.snaptutorial.com
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
3. Convert 126 x 10+2 to scientific and engineering notations.
4. Make the following conversions:
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
3. Convert 126 x 10+2 to scientific and engineering notations.
4. Make the following conversions:
a. Convert 0.34 seconds to milliseconds.
For more classes visit
www.snaptutorial.com
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
Ecet 105 Effective Communication - snaptutorial.comHarrisGeorg14
. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
3. Convert 126 x 10+2 to scientific and engineering notations.
4. Make the following conversions:
a. Convert 0.34 seconds to milliseconds
1. Develop the Boolean equation for the circuit shown below
2. Determine the output Y in Problem 1 for the input values shown below
3. Redraw the circuit in Problem 1 using only 2-input NAND gates
4.Develop the Boolean equation for the circuit shown below
5.Determine the period of a clock waveform whose frequency is:
6.Write the VHDL text file (Entity and Architecture) for a 2-input NAND gate.
For more classes visit
www.snaptutorial.com
1. Develop the Boolean equation for the circuit shown below
2. Determine the output Y in Problem 1 for the input values shown below
3. Redraw the circuit in Problem 1 using only 2-input NAND gates
4.Develop the Boolean equation for the circuit shown below
5.Determine the period of a clock waveform whose frequency is:
For more classes visit
www.snaptutorial.com
1. Develop the Boolean equation for the circuit shown below
2. Determine the output Y in Problem 1 for the input values shown below
3. Redraw the circuit in Problem 1 using only 2-input NAND gates
4.Develop the Boolean equation for the circuit shown below
Ecet 230 Enthusiastic Study / snaptutorial.comStephenson39
1. Develop the Boolean equation for the circuit shown below
2. Determine the output Y in Problem 1 for the input values shown below
3. Redraw the circuit in Problem 1 using only 2-input NAND gates
4.Develop the Boolean equation for the circuit shown below
5.Determine the period of a clock waveform whose frequency is:
For more course tutorials visit
www.newtonhelp.com
1. Does a typical computer have any analog outputs? If so, what are they?
2. List three advantages of digital signal representation as compared to their analog representation.
For more course tutorials visit www.newtonhelp.com
Chapter 2 Homework
1)A discrete 120 V ac output module is to be used to control a 230 V dc solenoid valve. Draw a diagram showing how this could be accomplished using an interposing relay.
2)Assume a thermocouple generates a linear voltage of from 20 mV to 50 mV when the temperature changes from 750°F to 1250°F. How much voltage will be generated when
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The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
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1. ECET 105 Week 1 Homework
For more classes visit
www.snaptutorial.com
1. Does a typical computer have any analog outputs? If so, what are
they?
2. List three advantages of digital signal representation as compared
to their analog representation.
3. Convert 126 x 10+2 to scientific and engineering notations.
4. Make the following conversions:
a. Convert 0.34 seconds to milliseconds.
b. Express 0.0005 x 10-4 farads as picofarads.
5. The frequency of a signal is equal to the reciprocal of the signal’s
period (f = 1/p). For a computer with a 2.4 GHz clock, what is the
clock period? Use engineering notation for your answer.
6. The signal shown below is a sine wave as it might be displayed on
an oscilloscope. If it takes 40 msec. for the waveform to travel
between the points shown by the arrow “B” below, what is the
frequency of the waveform?
7. Power (in watts) is a certain amount of energy (in joules) divided
by a certain length of time (in seconds). The laser with the highest
peak power produces energy of 186 joules in 167 femtoseconds. What
is the peak power? Use engineering notation for your answer. (Note:
Use references to determine the value of a femtosecond and the
proper notation for your answer.)
8. Which logic function produces a HIGH output only when all of the
inputs are HIGH?
9. Which logic function produces a HIGH output only when all of the
inputs are LOW?
2. 10. Using the Internet, find the data sheet for the 74LS00 integrated
circuit chip. Answer the following:
*****************************************
ECET 105 Week 1 iLab Introduction to
Laboratory Test Equipment
For more classes visit
www.snaptutorial.com
I. OBJECTIVES
1. To learn the function and basic operation of the instruments
comprising a test bench
2. To gain a basic understanding of how to use the power supply,
DMM, oscilloscope, and function generator
3. To take measurements using the power supply, DMM,
oscilloscope, and function generator
4. To determine waveform characteristics of various signals
II. PARTS LIST
Equipment
IBM PC or Compatible with Windows 2000 or Higher
ELVIS II+
Parts
1 - 1.0 kohm Resistor (color bands = brown, black, red, gold)
1 - 4.7 kohm Resistor (color bands = yellow, violet, red, gold)
3. III. PROCEDURES
A. Introduction to Instruments and Measurements
Before beginning this lab, be sure that you have read the Lab Prepfor
an explanation of how to use the various instruments.
1. Measure DC voltage with the DMM.
a. Attach the power supply +5 V outputs to the DMM inputs.
b. Launch the ELVIS II+ DMM
*****************************************
ECET 105 Week 2 Homework
For more classes visit
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1. What is the duty cycle for a square wave signal that is HIGH for 15
nsec and LOW for 30 nsec?
2. A pulse train is shown on the oscilloscope below. Determine the
period of the pulse.
3. Determine the frequency for a pulse that occurs every 10 ms.
4. What is the base-10 value for the binary number 11012?
5. What are the respective weights of the 1s in Problem 4?
6. How many different values can be represented by 6 bits, 7 bits, 8
bits, and 10 bits?
7. What is the minimum number of bits required to represent each of
the following decimal numbers: 10, 1,000, 100,000, and 1,000,000?
7. Convert the binary value, 1011010100101101,to a hexadecimal
equivalent.
4. 9. Convert the following decimal numbers to 8-bit binary values. For
negative numbers, use the 2’ complement formulation.
10. Express each of the following signed numbers (2s complement
format) in decimal:
*****************************************
ECET 105 Week 2 iLab Soldering Techniques
and the Electronic Die Kit
For more classes visit
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I. OBJECTIVES
1. To learn the basics of soldering.
2. To produce mechanically and electrically sound solder joints.
3. To assemble the Electronic Die Kit.
II. PARTS LIST
Equipment:
Digital Die Kit
Tools:
1 – Soldering Iron
1 – Pair Long-Nose Pliers
1 – Diagonal cutter
1 – Solder and hookup wire
1 – Wire stripper
5. III. PROCEDURE
1. Preparation
2. Prepare a well-ventilated and clear workspace with ample lighting.
3. Ensure that the workspace includes a mat to work on in order to
prevent the burning of the
Testing the Kit
7. Inspect the Atmel ATTINY85-20PU microcontroller. Straighten
any severely bent pins, very slowly; otherwise, they could break.
Align the IC on your breadboard so that the dot in the top lefthand
corner of the IC is at the same end as the notch in the IC socket.
Insert the pins on one side, but do not press in, making sure that each
pin is started in its socket. Gently press the IC from the other side
against the pins started until the pins on the other side easily start in
their sockets. Double check that no pin is bent under or is outside of
its intended socket location. Press the IC into the socket, firmly but
gently.
2. Attach the 9V battery firmly to the battery connector.
3. The die kit should resemble Figure 4.1 when assembly is
completed. The Atmel ATTINY85-20PU has been shipped with a
program already stored so that the die may be tested by connecting
the 9V battery to the connector, then pressing and holding the
momentary switch and releasing it. While the switch is pressed, the
LEDs will blink in a random pattern. When the switch is released, a
randomly generated number between 1 and 6 will be displayed on the
LED die. Note any performance issues.
Hints:
If the die is not working on the first try, turn it off by unplugging the
battery. Check for warm/hot components.
If the regulator U1 is hot, you have a short somewhere. Look for
solder shorts, incorrectly inserted components, and leads that may be
touching adjacent leads. Remove the shorting connection and try
again.
*****************************************
6. ECET 105 Week 3 Homework
For more classes visit
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1. Determine the output X for the 2-input AND gate with the input
waveforms shown.
2. Determine the output X for the 2-input OR gate with the input
waveforms shown.
3. Determine the output X for the 2-input Exclusive-OR gate with the
input waveforms shown
4. Determine the output X for the 2-input NAND gate with the input
waveforms shown.
5. Is the output from the NAND gate shown in Problem 4 active-
HIGH or active-LOW? Why?
6. Download from a semiconductor manufacturer’s website (such as
ti.com) the data sheet for a DIP packaged quad NOR gate (74x02).
What pins does this chip use for the inputs to the first gate?
7. Draw a logic circuit that performs the following Boolean
expression: Y = A * B.
8. Draw a logic circuit that performs the following Boolean
expression:
9. Which gate is represented by the truth table below?
10. Use a truth table to determine the function of the gate shown
below.
7. *****************************************
ECET 105 Week 3 iLab Introduction to Digital
Logic Gates
For more classes visit
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I. OBJECTIVES
1. To understand basic logic functions (AND, OR, and NOT) and
their complement used in Boolean algebra and digital logic
design.
2. To test simple logic small-scale integration (SSI) integrated
circuit (IC) devices.
II. PARTS LIST
Equipment:
IBM PC or Compatible with Windows 2000 or Higher
Parts:
1 – 74LS00 Quad 2-Input NAND Gate IC
1 – 74LS02 Quad 2-Input NOR Gate IC
1 – 74LS04 Hex INVERTER Gate IC
1 – 74LS08 Quad 2-Input AND Gate IC
1
(Pin 3) Output (Pin 1)
Table 5.11 - NOT Gate Theoretical Truth Table
8. 3. Write the Boolean expression below for the relationship
between the device input (labeled as A) and output (labeled
as Y).
OUTPUT Y = ____________________________
4. Construct the circuit shown in Figure 5.13. Note that the pin
numbers for inputs and outputs have changes from Figure
5.11 (output is now Pin 2, input is on Pin 1).
Figure 5.13 – 2-Input NOR Gate Test Circuit
5. Connect the circuit to verify the logic gate operation recording
the input and output voltages. Fill in the truth table below for
ALL possible logic conditions.
Input (Pin 1) Output (Pin 2)
Table 5.12 - NOT Gate Measured Truth Table
Do the results match the manufacturer’s truth table?
__________ (YES or NO)
1. TROUBLESHOOTING
Describe any problems encountered and how those problems were
solved.
*****************************************
ECET 105 Week 4 Homework
For more classes visit
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9. 1. Draw a logic circuit that performs the following Boolean
expression:
2. Determine the Boolean expression for the circuit shown below.
3. The Boolean expression for an AND gate is . Does the expression
also describe an AND gate? Prove your answer.
4. Write the Boolean expression for the logic circuit shown below.
5. Develop the truth table for the circuit shown in Problem 4.
6. Develop the truth table for the circuit shown below.
7. Develop the Boolean expression for the circuit shown in Problem 6.
8. Draw a logic circuit using only NAND gates to implement the
following Boolean expression: Y =AB + C.
9. Develop a logic circuit, using only NAND gates, to implement a
circuit to meet the requirements of the truth table shown below.
10. Determine the Boolean description for the circuit shown below.
*****************************************
ECET 105 Week 4 iLab Logic Circuit Design,
Simplification, Simulation, and Verification
For more classes visit
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Objectives:
1. To design a digital logic circuit using a truth table and sum-of-
product (SOP) formulation.
10. 2. To use the MultiSim program to simplify, simulate, and test the
circuit operation.
3. To build and test the logic circuit to verify that the system
performs as expected.
Results:
Built a circuit board which would turn on the LED light and used
multisim and tools which would simplify to do so. Verified the truth
table to check and see if the vales are accurate.
*****************************************
ECET 105 Week 5 Homework
For more classes visit
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1. Determine the decimal value of each of the following unsigned
binary numbers:
2. Determine the decimal value of each of the following signed binary
numbers displayed in the 2’s complement form:
3. Determine the outputs (Cout, Sout) of a full-adder for each of the
following inputs:
4. The circuit below is an attempt to build a half-adder. Will the Cout
and Sout function properly? Demonstrate your rationale.
5. Determine the outputs for the circuit shown below. Assume that C0
= 0 for all cases.
6. Derive the Boolean equation for A = B, when A and B are 4-bit
numbers.
11. 7. Complete the timing diagram below for a 2-bit adder. (10 points)
8. Answer the following:
What is the frequency of a periodic waveform with a period of 1.0
µsec?
How many bits are required to represent decimal numbers from -256
to +255?
What is the largest positive number that can be represented by 10
signed bits?
9. The full-adder shown below is tested under all input conditions as
shown. Is the circuit operating correctly? If not, what is the most
likely fault?
10. Using a 4-bit adder/subtractor, carry out the binary operations for
9 – 3 and 3 – 9. What can you conclude about the answers and the
carry out bit (C4)?
*****************************************
ECET 105 Week 5 iLab Designing Adders and
Subtractors
For more classes visit
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Objectives:
The objectives are to reinforce the concepts of binary
addition/subtraction while using the Quartus II Programmable Logic
12. Tool as well as getting used to the program. We were also supposed
to build and test a simple adder/subtractor using the eSOC III Board.
Observations/Measurements:
Describe any problems you had with this week’s assignment.
1. In the simulation run of the four-bit adder, when we performed the
addition 5 + 3, we did not immediately have an output of 8 on SOUT.
What could be the cause of this?
2. If we changed the count period to 1000 nS for A and B, would this
correct the anomalies in Question 1? Why or why not?
3. How fast can your 4-bit adder/subtractor determine the sum or
difference of two numbers?
4. Use the simulation timing diagram to compare the worst case time
to do an operation with your adder/subtractor with the worst case
using the 74LS283. State which operation takes the longest and list
the time required for both devices.
*****************************************
ECET 105 Week 6 Homework
For more classes visit
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1. When a HIGH is on the output of the decoding circuit below, what
is the binary code appearing on the inputs?
2. Write the Boolean equations for each of the following codes if an
active-LOW decoder output is required. The first decode is shown as
an example.
13. 3. What are the active outputs of a BCD-to-7 segment decoder with an
input of 0100?
4. A 7-segment decoder/driver drives the display below. Using the
waveforms shown, determine the sequence of digits that appear on the
display.
5. Construct a truth table for an active-LOW output BCD (1-of-10)
decoder.
6. Derive the truth table for the Y output in the diagram below.
7. Derive the Boolean equation for the Y output in Problem 6.
8. For the multiplexer shown below, determine the output for the
following input state.
D0 = 0, D1 = 1, D2 = 1, D3 = 0, S0 = 1, S1 = 0.
9. Determine the function of the circuit shown below.
10. Write the Boolean equation for the circuit shown in Problem 9
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.
ECET 105 Week 6 iLab Decoders and
Multiplexers
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www.snaptutorial.com
Objectives:
1. To learn about the operation of a BCD-to-seven-segment
decoder
2. To learn about the operation of a seven-segment display
14. 3. To learn about the operation of multiplexers
4. To build and test a multiplexed display circuit using both
discrete components and the eSOC III board
Questions:
Why are the 330 Ω resistors required for the discrete logic circuit, but
not for the MultiSim simulated circuit or the eSOC III circuit?
Create a partial truth table showing the requirements for a seven-
segment decoder to output a hexadecimal digit. This requires four
input bits and six output states, A – F. For each output state, show the
segments a-g. The output states for the inputs 0 – 9 are the same as for
the 74LS47 (see focus.ti.com). Use capital letters A, C, E, F and
lower case for b and d.
Why is the seven-segment display driven with an active-LOW signal
using discrete logic and an active-HIGH with the eSOC board?
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ECET 105 Week 7 Homework
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1. Sketch the Q output for the waveforms shown. Assume that Q
starts LOW.
2. Sketch the Q output for the circuit shown below. Assume that Q
starts LOW.
3. Sketch the Q output for the circuit shown below. Assume that Q
starts LOW.
15. 4. Sketch the Q output for the circuit shown below. Assume that Q
starts LOW.
5. Sketch the Q output for the circuit shown below. Assume that Q
starts LOW.
6. Sketch the Q output for the circuit shown below. Assume that Q
starts LOW.
7. Sketch the Q output for the circuit shown below. Assume that Q
starts LOW.
8. Sketch the Q0 and Q1 outputs for the circuit shown below. Assume
that both Q0 and Q1 start LOW.
9. What is the output frequency for Q1 in the circuit shown below?
10. What is the output frequency for Q2 in the circuit shown below?
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ECET 105 Week 7 iLab Add-Subtractor using
Flip-Flops
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I. OBJECTIVES
1. To test the operation of a 74LS74 D flip-flop and compare the
operation with the predicted behavior
2. To test the operation of a 74LS112 J-K flip-flop and compare
the operation with the predicted behavior
3. To measure propagation delays of a 74LS112 J-K flip-flop
16. 4. To build and test an enhanced adder-subtractor
II. PARTS LIST
Equipment:
IBM PC or Compatible with Windows 2000 or Higher
Quartus II Design Software—Version 9.1
Frequency Generator
Oscilloscope
Parts:
2 – 330 Ω resistors, ¼ W 2 – Red LEDs
1 – 74LS74 dual D flip-flop 1 – Green LED
1 – 74LS112 dual J-K flip-flop 1 – SPDT Switch,
DIP configuration
1 – eSOC III FPGA Board
III. PROCEDURE
A. Test the 74LS74 D Flip-Flop
Build the D flip-flop circuit shown in Figure 7.1. The LEDs are wired
as active-LOW since the flip-flop can supply more current in a low
state than in a high state. This means that the green LED is on when is
HIGH and the red LED indicates Q is HIGH. Remember to attach
VCC to pin 14 and ground to pin 7.
Using the circuit, verify that the operation follows the truth table for
this device.
What happens when both and are set low?
Build the J-K flip-flop circuit shown in Figure 7.2. Remember to
attach VCC to pin 16 and ground to pin 8.
Using the circuit, verify that the operation follows the truth table for
this device.
Increase the pulse generator output to 1.0 MHz. Set the switches so
that all of the flip-flop inputs are high and remove the LEDs and
resistors. Using the oscilloscope, measure the propagation times for
the Q output from the active clock edge. Record the value below.
Using Quartus II, modify the circuit from Lab 5 as shown in Figure
7.3 by adding three 7474 D-flip-flip chips. Note that a clear function
17. has been added and that the flip-flop presets are inactive since they
are tied to +5V (labeled VCC).
Perform a simulation to verify the correct operation of the circuit.
Note that in this case, the CLOCK signal is not a periodic signal; the
CLOCK signal is a discrete signal occurring on a switch closure.
Assign pins to the inputs and outputs. Use the DIP switches for your
inputs (0-3 for A, 8-11 for B, 7 for CLEAR, 15 for ADDSUB), one of
the debounced pushbuttons for CLOCK and the red LEDs for outputs
(RD0-4).
Download you program to the eSOC III board and test the operation
of the circuit.
Photograph your final circuit for submission (online) or demonstrate
your circuit to your professor (onsite or blended).
Why is the condition when both and are LOW considered illegal?
How do the values you measured for tPHL and tPLH compare with
values specified in the 74LS112 data sheet? You may need to go
online to find this value.
Why were the LEDs removed before making the propagation delay
measurements?
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