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Digital Electronics and Digital Instruments Course Code: 3340904
GTU/ NITTTR Bhopal/13-14 Gujarat State
GUJARAT TECHNOLOGICAL UNIVERSITY, AHMEDABAD, GUJARAT
COURSE CURRICULUM
COURSE TITLE: DIGITAL ELECTRONICS AND DIGITAL INSTRUMENTS
(Code: 3340904)
Diploma Programmes in which this course is offered Semester in which offered
Electrical Engineering 4th
semester
1. RATIONALE
Digital electronics has invaded all branches of engineering and electrical engineering in
particular. Hence it is essential that the diploma electrical engineer have a sound
understanding of the basic fundamentals of digital electronics. Similarly digital instruments
are replacing the analog instruments. Therefore, this course has been designed so that basic
skills to operate and maintain the basic digital circuits and digital instruments are developed
in the students.
2. COMPETENCY
The course content should be taught and implemented with the aim to develop different types
of skills so that students are able to acquire following competency:
Maintain digital electronic circuits and instruments.
3. COURSE OUTCOMES
The theory should be taught and practical should be carried out in such a manner that students
are able to acquire different learning outcomes in cognitive, psychomotor and affective
domain to demonstrate following course outcomes.
i. Use digital integrated circuit logic family chips.
ii. Perform computational and measurement activities using digital techniques.
iii. Build sequential and combinational logic circuits.
iv. Analyse working of A/D and D/A converters.
v. Use display devices for digital circuits.
vi. Use digital meters for measurements.
4. TEACHING AND EXAMINATION SCHEME
Teaching Scheme
(In Hours)
Total
Credits
(L+T+P)
Examination Scheme
Theory Marks Practical
Marks
Total
Marks
L T P C ESE PA ESE PA
150 4 0 2 6 70 30 20 30
Legends: L-Lecture; T – Tutorial/Teacher Guided Theory Practice; P - Practical; C – Credit ESE - End
Semester Examination; PA - Progressive Assessment.
Digital Electronics and Digital Instruments Course Code: 3340904
GTU/ NITTTR Bhopal/13-14 Gujarat State
5. COURSE DETAILS
Unit Major Learning Outcomes (in cognitive domain)
Topics and Sub-topics
Unit – I
Number
Systems
1a. Convert numbers from
one to another system
1b. Perform binary
arithmetical operations.
1c. Explain various types of
binary codes and its
applications.
1.1Types of number system, inter conversion
1.2 Basic mathematical operations – 1’s
complement,2’s complement, 9s
complement and 10’s complement
1.3 Binary addition, subtraction,
multiplication and division.
1.4 Introductions to codes –Binary, weighted
,non weighted codes, Excess code, Grey
code, BCD code, Hamming code (only
introduction)
Unit– II
Logic Gates
And Wave
Shaping
Circuits
2a. Use of Diode as Wave
shaping circuit with the
output waveforms of the
clipper circuit.
2.1 Diode and transistor as a switch.
2.2 Diode as a clipper circuit
2b. Differentiate different
logic levels
2c.Prepare the truth table of
various logic gates.
2d. Develop basic gates
using Universal gates
2.3 Positive logic and negative logic levels
2.4 Different types of logic gates, symbol and
truth table
2.5 Universal gates - NAND and NOR
2e. State the features of
various logic families
2.6 Logic family RTL, DTL
2.7 NMOS, PMOS and CMOS
Unit– III
Boolean
Algebra and
Combinational
Circuits
3a.Apply laws of Boolean
algebra
3b.State the need for
Demorgan’s theorems.
3.1 Laws of Boolean algebra.
3.2 Demorgan’s theorems.
3c.Build logic circuit for a
given Boolean expression
3d.Build various
combinational circuits.
3e.Describe the working of 3
to 8 decoder and BCD to
Seven segment decoder
3.3 Boolean expression and logic diagram
and vice versa
3.4 Simplification of given Boolean equation.
3.5 Combinational circuits: Half and Full
Adder, half and full Subtractor,
Multiplexer and Demultiplexer Encoder
and Decoder
Unit- IV
Sequential
Circuits
4a.Explain the working of
various Flip Flops with
the help of truth table.
4.1Flip-Flop (FF) circuits: R-S, D, J-K and
master slave J-K.
4b.Describe the working of
various types of shift
generator.
4.2Shift register: series, parallel left and
right
4c.Draw the waveform of
Asynchronous and
Synchronous counter
counters
4.3Asynchronous and Synchronous counter
using 7493 and 7490
4d. Select various 4.4 Introduction of Semiconductor memory
Digital Electronics and Digital Instruments Course Code: 3340904
GTU/ NITTTR Bhopal/13-14 Gujarat State
Unit Major Learning Outcomes (in cognitive domain)
Topics and Sub-topics
semiconductor memories RAM, ROM, PROM, EPROM and EEPROM
Unit-V
A to D And D
to A
Convertors and
Display Devices
5a.Describe the working of
various types of A to D
convertors.
5b.Describe the working of
various types of and D to
A convertors.
5.1 Digital to Analog conversion.
Weighted Resistor Network type
Binary Ladder Network type
5.2 Analog to Digital conversion
Parallel Comparator type
Successive approximation type
Counter OR Staircase type
5c.Explain working of
various display devices
used with digital circuits.
5.3 Display devices
Mechanical Drum or Disc type
Light Emitting Diode type
Liquid Crystal Display
Unit-VI
Digital
Instruments
6a. State the features of
digital over analog
instruments.
6.1 Comparison of digital instrument with
analog instrument.
6b.Draw the block diagram
of digital instruments and
explain each block.
6.2 Basic building blocks of -digital
instruments.
6c. Explain the working of
various Digital
instruments
6.3 Digital volt-meter - Ramp and Staircase
type
6.4 Digital frequency meter, multi meter,
Digital watt meter, Digital energy meter
6. SUGGESTED SPECIFICATION TABLE WITH HOURS AND MARKS (THEORY)
Unit
No.
Unit Title Teaching
Hours
Distribution of Theory Marks
R
Level
U
Level
A
Level
Total
Marks
I Number Systems 8 2 4 4 10
II Logic Gates and Wave shaping
Circuits 11 4 4 6 14
III Boolean Algebra And
Combinational Circuits 12 3 4 8 15
IV Sequential Circuits 11 4 6 4 14 V A to D and D to A Convertors
and Display Devices 8 4 4 2
10
VI Digital Instruments 6 3 3 1 7
Total 56 20 25 25 70
Legends: R = Remember; U = Understand; A = Apply and above levels (Revised Bloom’s taxonomy)
Note: This specification table shall be treated as a general guideline for students and teachers. The actual
distribution of marks in the question paper may vary slightly from above table.
7. SUGGESTED LIST OF EXERCISES/PRACTICAL
The practical/exercises should be properly designed and implemented with an attempt to
develop different types of skills (outcomes in psychomotor and affective domain) so that
students are able to acquire the competencies/programme outcomes. Following is the list of
practical exercises for guidance.
Digital Electronics and Digital Instruments Course Code: 3340904
GTU/ NITTTR Bhopal/13-14 Gujarat State
Note: Here only outcomes in psychomotor domain are listed as practical/exercises. However,
if these practical/exercises are completed appropriately, they would also lead to development
of certain outcomes in affective domain which would in turn lead to development of Course
Outcomes related to affective domain. Thus over all development of Programme Outcomes
(as given in a common list at the beginning of curriculum document for this programme)
would be assured.
Faculty should refer to that common list and should ensure that students also acquire
outcomes in affective domain which are required for overall achievement of Programme
Outcomes/Course Outcomes.
8. SUGGESTED LIST OF STUDENT ACTIVITIES
Following is the list of proposed student activities such as:
i. Student may validate the experimental results with that of results obtained using
various simulation soft ware’s.
S.
No. Unit No.
Practical Exercises
(outcomes in psychomotor domain)
Approx
Hrs.
required
1 II Verify the truth table of the different Logic Gates. 2
2 II Build basic Gates using NAND Universal Gate. 2
3 II Build basic Gates using NOR Universal Gate. 2
4 II Build diode positive clipper circuits and observe the output waveform 2
5 II Build diode negative clipper circuits and observe the output waveform. 2
6 III Build and test the logic circuit to prove commutative laws, Associative
laws and Distributive laws. 2
7 III Verify Demorgan’s theorems. 2
8 III Build and test the logic circuit for a given Boolean Expression. 2
9 III Build and test the logic circuit for simplification of a given Boolean
Expression. 2
10 III Build and test Half Adder Circuit. 2
11 III Build and test Full Adder Circuit. 2
12 III Build and test Half Subtractor Circuit. 2
13 III Build and test Full Subtractor Circuit. 2
14 IV Build and test the working of the R-S Flip-Flop for Active High inputs. 2
15 IV Build and verify the truth table of R-S Flip-Flop for Active Low inputs. 2
16 IV Build and verify the truth table of D Flip-Flop. 2
17 IV Build and verify the truth table of JK Flip-Flop. 2
18 IV Build and test the working of the Shift Register. 2
19 IV Build and Test the working of the Decade counter. 2
20 IV Display various alphanumeric characters on BCD and Seven segment
LED Display. 2
21 IV Build/Test the 4 bit Decoder circuit. 2
22 IV Build/Test the 4 bit Encoder circuit. 2
23 V Convert given analog signal to 4 bit Digital output using ADC 2
24 V Convert the given digital signal to analog output using DAC. 2
25 VI Build and Test various digital circuits with the help of simulation
software.
2
Total Hours (Perform any practical worth 28 hours from above depending upon the
availability of resources so that most units are covered) 50
Digital Electronics and Digital Instruments Course Code: 3340904
GTU/ NITTTR Bhopal/13-14 Gujarat State
ii. Student may present seminar on a given topic of this subject
iii. Students may develop counters for practical use
9. SPECIAL INSTRUCTIONAL STRATEGIES (IF ANY)
Visit to nearby electronic component manufacturing factories
Display of animation/video films on functioning of digital instruments.
10. SUGGESTED LEARNING RESOURCES
A) List of Books
Sr.
No. Title of Book Author Publication
1. Digital Electronics Sanjay Sharma S.K.Kataria & sons.
2. Digital Electronics Dr.B.R.Gupta &
V.Singhal
S.K.Kataria & sons.
3. Digital Electronics (for
Polytechnics)
Pratima Manhas
Shaveta Thakral
S.K.Kataria & sons.
4.
Trouble shooting &
Maintenance of Electronic
equipments
K. Sudeep singh S.K.Kataria & sons.
5. Digital design : with an
introduction to the verilog hdl
M. Morris Mano,
Michael D. Ciletti
Pearson, 5th
edition.
6. Morden Digital Electronics R P Jain TMH
7. Fundamentals of Digital
circuits
A. Anand Kumar PHI
8. Digital Electronics K. Meena PHI
9.
Digital principles &
applications
Malvino. A. P.,
Leach D. P.,
Saha Goutam
Tata Mcgraw Hill Education
Private Limited (2010), 7th
Edition
10. Pulse digital & switching
wave forms
Millman & Taub Mc. Graw Hill
11. Electronic devices & circuits Allen Mottershed. Prentice Hall of India
12. Principles of digital
electronics
Malvino & Leach Tata Mc. Graw Hill
13. Digital circuits & systems Douglass V. Hall Mc. Graw Hill
B) List of Major Equipment/ Instrument with Broad Specifications
Bread board with connecting wires & various logic input/output facilities
Various Logic Gates, Flip-Flop, Registers, Counters, Encoder, Decoder,
ADC, DAC, Seven Segment Code converter related ICs
Digital Logic trainer board.
A/D and D/A trainer modules.
Universal counter module
Demonstration kit for various display devices
Digital IC tester
Regulated Power Supply
Digital Storage Oscilloscope
Digital Multimeter
Digital Electronics and Digital Instruments Course Code: 3340904
GTU/ NITTTR Bhopal/13-14 Gujarat State
Various kits of Digital Voltmeter, Frequency meter, Watt meter, Energy meter.
Digital Function Generators
The Virtual Instrumentation Educational Laboratory Suite specifically for teaching
analog, digital, and power laboratories
C) List of Software/Learning Websites
Matlab 2011a
Psim
Electronics Work Bench
www.nptel.iitm.ac.in
www.ocw.mit.edu
www.slideshare.net/
www.alldatasheet.com
www.nptl.iitm.ac.in
www.ocw.mit.edu
www.slideshare.net
www.authorstream.com
www.daenotes.com
www.youtube.com/nptelhrd
www.Howstuffworks.com
Various Simulation soft ware’s such as Electronics Workbench etc.
11. COURSE CURRICULUM DEVELOPMENT COMMITTEE
Faculty Members from Polytechnics
Prof. S.V. Jagani Lecturer, Govt. Polytechnic Dahod.
Prof J.C. Gadani, Lecturer, C U Shah Govt. Polytechnic Surendranagar.
Prof H.I. Joshi, Lecturer, Govt. Polytechnic, Ahmedabad.
Coordinator and Faculty Members from NITTTR Bhopal
Prof. (Mrs.) C. S. Rajeshwari, Head of Department of Electrical and Electronics
Engineering.
Prof. Joshua Earnest, Professor, Department of Electrical and Electronics
Engineering.
Laxmi Institute of Technology, Sarigam
Diploma Electrical Engineering Department Academic Year: 2018-19
ASSIGNMENT: 1
Name of Subject : DIGITAL ELECTRONICS AND DIGITAL INSTRUMENTS Date:
Subject Code : 3340904
Chapter/Unit 1: Number Systems
Sr. No. Name of Question Remarks
1. Convert the given decimal numbers into binary numbers (a)256 (b) 210 (C)0.875 (D)15.95
2. Convert the following decimal numbers into octal numbers (a)247 (b) 1406 (C)11.11
3. Convert the following decimal numbers into hexadecimal numbers (a)3558 (b) 6708 (C)4534
4. Convert the following binary numbers into decimal numbers (a) 1100110011 (b)110101.101
5. Convert the following octal numbers into decimal numbers (a) 5507 (b)435.635
6. Convert the following hexadecimal numbers into decimal numbers (a) C67 (b)DE12
7. Convert the following octal numbers into binary numbers (a)65302 (b)3764.67
8. Convert the following binary numbers into octal numbers (a)1111.1011 (b)1110011100.101
9. Convert the following hexadecimal numbers into binary numbers (a)BEC45 (b)98FE.CD
10. Convert the following binary numbers into hexadecimal numbers (a) 11111111.01011 (b)11011111100011
11. Convert the following octal numbers into hexadecimal numbers (a)65442 (b)2653.506
12. Convert the following hexadecimal numbers into octal numbers (a)324.BA (b) 11.11(C)ABCD
13. Perform binary addition (a) (1101011) 2 + (0101101) 2 (b) (0001001) 2 + (0101100) 2
14. (1110001) 2 - (1111011) 2
Laxmi Institute of Technology, Sarigam
Diploma Electrical Engineering Department Academic Year: 2018-19
15. Using 1’s compliment subtract (1101)2 from (0111)2
16. Using 2’s compliment subtract (10110111)2 from (10011101)2
17. Find the 9’s compliment of the following decimal numbers. (a)3465 (b)782.54 (c)4526.075
18. Find the 10’s compliment of the following decimal numbers. (a)4069 (b)1056.074
19. (A)Multiply (101.10)2 by (10.1)2 (B) Obtain the result for (1.01)2 * (10.1)2
20. Perform (1011101)2 ÷ (1010)2
21. Give types of Codes. Explain BCD code Gray code and error correcting code in details.
22. Obtain Excess-3 code for (a) (625)10 (b) (807)10
23. Convert following binary numbers into gray codes (a)101101 (b)011010
24. Convert following gray codes into binary numbers (a)1101 (b)10110010
Date of Submission:-
Name & Sign of Subject In-charge :
Laxmi Institute of Technology, Sarigam
Diploma Electrical Engineering Department Academic Year: 2018-19
ASSIGNMENT: 2
Name of Subject : DIGITAL ELECTRONICS AND DIGITAL INSTRUMENTS Date:
Subject Code : 3340904
Chapter/Unit 2: Logic Gates And Wave Shaping Circuits
Sr. No. Name of Question Remarks
1. Give any four advantages of electronic switch.
2. Explain the working of transistor as a switch.
3. Explain the working of diode as a switch.
4. Draw the symbol and truth table of AND gate, OR gate, NOT gate,NAND Gate , NOR gate , EX-OR Gate & EX-NOR Gate.
5. Draw AND gate and EX-NOR gate with three input and give its truth table.
6. Show that the NAND gate is universal gate.
7. Prove that NOR gate is a universal gate.
8. Explain combined clipper circuit using two diodes.
9. Write four applications of clipper circuit
10. Draw and explain positive biased clipper with necessary waveforms.
11. Give classification of Logic families and briefly explain Diode transistor logic with two input NAND gate with its merits and demerits.
12. Explain propagation delay and noise immunity as parameter of digital IC.
13. Describe transistor - transistor logic with its merits and demerits.
Laxmi Institute of Technology, Sarigam
Diploma Electrical Engineering Department Academic Year: 2018-19
14. Draw and explain NOR gate using RTL logic. Give its advantages and disadvantages.
15. Draw and explain NAND gate using CMOS logic. Give its advantages and disadvantages.
16. Explain the working of CMOS -NOR Gate with the help of diagram and give advantages of CMOS over TTL.
Date of Submission:-
Name & Sign of Subject In-charge :
Laxmi Institute of Technology, Sarigam
Diploma Electrical Engineering Department Academic Year: 2018-19
ASSIGNMENT: 3
Name of Subject : DIGITAL ELECTRONICS AND DIGITAL INSTRUMENTS Date:
Subject Code : 3340904
Chapter/Unit 3: Boolean Algebra and Combinational Circuits
Sr. No. Name of Question Remarks
1. Explain properties of Boolean algebra.
2. Simplify using Boolean algebra: AB+A(B+C)+B(B+C)
3.
Show that using Boolean algebra (i) AB + CD = (A+C)(A+D)(B+C)(B+D) _ _ _ (ii) A(A+C)(AB+C) = 0 (iii) A. (A+B) = A
4. Applying laws of Boolean algebra prove that
_ _ _ _ _ _ (i) A + AB + AB = A + B (ii) AB + AB + AB + AB + B = 1
5. Show that using Boolean algebra
(i) (A+B+AB)(A+C) = A+BC (ii) (X+Y)(X+Z) = X+YZ
6.
Prove that (i) (P+Q)(P+R) = P + QR _ (ii) XYZ + XY Z + XZ = XZ (iii) AB +ABC + A’B +AB’C = ( B + C ) ( A + B )
7. Briefly explain the Principle of Duality.
8. Explain De Morgan’s Theorem with the help of Logic circuit and truth table
9. Draw the logic diagram for the given Boolean expressions:
_ _ _ _ _ (i) Y = AD + BCD + BCD (ii) Y= ABC + ABC
10. Draw logic circuit for the Boolean expression :
_ _ _ ABCD + ABCD+ABCD + ABCD.
11. Draw logic circuit for the Boolean expression :
_ _ _ _ Y = (A+B+C).(A B).(ABC)
Laxmi Institute of Technology, Sarigam
Diploma Electrical Engineering Department Academic Year: 2018-19
12. _ _
Draw logic diagram of XY +XY + Z using only NAND gate
13. Draw logic diagram for half adder and full adder and explain with truth table.
14. Draw the logic circuit of Full Subtractor.
15. Draw and briefly explain 2 to 1 multiplexer with logic diagram and truth table
16. Explain the 1 to 8 demultiplexer with the help of block diagram and truth table.
17. What is a Decoder? Draw and explain the logic circuit of 3 to 8 decoder and Write its truth table. Give four applications of decoder in digital system
18. Explain Decimal to BCD Encoder with necessary logic circuit and truth table.
Date of Submission:-
Name & Sign of Subject In-charge :
Laxmi Institute of Technology, Sarigam
Diploma Electrical Engineering Department Academic Year: 2018-19
ASSIGNMENT: 4
Name of Subject : DIGITAL ELECTRONICS AND DIGITAL INSTRUMENTS Date:
Subject Code : 3340904
Chapter/Unit 4: Sequential Circuits
Sr. No. Name of Question Remarks
1. What is combinational circuit? Compare combinational circuits and sequential circuit.
2. Explain R-S flip flop using logic circuit and truth table.
3. Write the truth table for D flips flop.
4. Draw the Logic circuit of JK flip flop and briefly explain its working.
5. Explain the race around condition in JK flip flop and list the methods to overcome it.
6. Explain J-K master slave flip-flop with its logic circuit and truth table.
7. List different types of shift registers. Explain shift right type serial-in-serial-out shift register.
8. List any three applications of Shift registers and decoders each.
9. Explain briefly four basic types of shift registers.
10. Explain 4-bit shift left register using J-K flip flop.
11. Draw decade counter and explain reset arrangement. Also Give any four applications of Counters.
12. Explain IC-7490 decade counter.
13. Give classification of RAM and give applications of RAM. Give classification of ROM and give applications of ROM. Compare static RAM with dynamic RAM.
Date of Submission:-
Name & Sign of Subject In-charge :
Laxmi Institute of Technology, Sarigam
Diploma Electrical Engineering Department Academic Year: 2018-19
ASSIGNMENT: 5
Name of Subject : DIGITAL ELECTRONICS AND DIGITAL INSTRUMENTS Date:
Subject Code : 3340904
Chapter/Unit 5: A to D And D to A Convertors and Display Devices
Sr. No. Name of Question Remarks
1. Describe advantages and disadvantages of weighted resistor D/A converter.
2. Give specifications of D/A Converters. Explain the term resolution , linearity AND settling time with respect to D/A converter.
3. Draw block diagram of A/D converter. Explain quantization and encoding
4. Explain parallel comparator analog to digital converter
5. Write the advantages and disadvantages of voltage to time conversion type A/D converter
6. State different types of A to D convertor. Explain successive approximation type A to D convertor.
7. Give advantages and disadvantages of LED Display and list any two applications of LED.
8. Explain seven segment LED display
9. Explain common cathode and common anode type LED display with necessary circuit diagram.
10. Explain the construction and working of LCD.
11. Compare LED with LCD.
Date of Submission:-
Name & Sign of Subject In-charge :
Laxmi Institute of Technology, Sarigam
Diploma Electrical Engineering Department Academic Year: 2018-19
ASSIGNMENT: 6
Name of Subject : DIGITAL ELECTRONICS AND DIGITAL INSTRUMENTS Date:
Subject Code : 3340904
Chapter/Unit 6 : Digital Instruments
Sr. No. Name of Question Remarks
1. Write advantages of digital instruments over analog instruments.
2. List any four building blocks of Digital Instruments
3. Draw and explain block diagram of digital instruments.
4. Explain the working of Digital frequency meter with the help of Block Diagram and waveforms.
5. Explain ramp type analogue to digital converter digital voltmeter.
6. What is the need of Clock and comparator in Digital Instruments?
Date of Submission:-
Name & Sign of Subject In-charge :
DIGITAL ELECTRONICS AND DIGITAL INSTRUMENTS (3340904)
Department of Electrical Engineering Laxmi Institute of Technology, Sarigam(Diploma)
QUESTION BANK
Chapter 1 – Number Systems
1. Convert (1010.11)2 to decimal number.
2. Convert (100)10 to binary number.
3. Multiply (1.01)2 by (10.1)2.
4. Divide (1110100)2 by (111010)2.
5. Add (100101)2 to (110111)2.
6. Subtract (111001)2 from (1110001)2 7. Convert (1035)8 to Decimal number.
8. Convert the given decimal numbers into binary numbers (a) 256 (b) 210
9. Answer the following (a) 73BD + 2A9F (b) (1110001) 2 - (1111011) 2 (c) (28)10 = ( )16 (d) (10110110) 2 = ( ) 16
10. (i) Convert the following decimal numbers into hexadecimal numbers (a) 3558 (b) 6708 (ii) perform binary addition (a) (1101011) 2 + (0101101) 2 (b) (0001001) 2 + (0101100) 2
11. Convert (247)10 in to binary and octal number. 12. Convert (ABCD)16 in to octal number. 13. Multiply (101.10)2 by (10.1)2.
14. Convert (4534)10 in to hexadecimal number 15. Convert (324.BA)16 in octal number. 16. Multiply (101.11)2 by (10.01)2. 17. Convert (15.95)10 in to binary number. 18. Obtain BCD code for (725)10. 19. Obtain the result for (1.01)2 * (10.1)2. 20. Convert (0.875) 10 in to binary number. 21. Convert (BEC45)16 in to binary number. 22. Convert (11.11)10 into hexadecimal and octal. 23. Perform (1011101)2 ÷ (1010)2 24. Obtain the 2’s compliment for (1101). 25. Using 2’s compliment subtract (10110111)2 from (10011101)2. 26. Using 2’s compliment subtract (1101)2 from (0111)2. 27. Give types of Codes. Explain any one in details. 28. Explain BCD code. 29. Explain gray code. 30. Explain error correcting code. 31. State the full form of ASCII 32. Obtain Excess-3 code for (625)10. 33. Convert (101101)gray into binary.
Chapter 2 – Logic Gates And Wave Shaping Circuits
1. Give any four advantages of electronic switch. OR Give advantages of electronic switch.
2. Explain the working of transistor as a switch. 3. Explain the working of diode as a switch. OR
Explain working of PN Junction Diode as switch with switching characteristics 4. Explain positive & negative logic with necessary diagram. 5. Draw the symbol and truth table of NAND Gate & EX-OR Gate 6. Prepare the truth table for AND gate and OR gate with two inputs. 7. Using AND, OR and NOT gate prepare EX-OR gate and its truth table. 8. Draw EX-NOR gate with three input and give its truth table. 9. Drawthe logic circuit of NOR gate, EX- OR gate and OR gate using NAND gate. 10. Draw electrical equivalent circuit of NOT gate. 11. Draw electrical equivalent circuit of AND gate. 12. Show that the NAND gate is universal gate. 13. Prove that NOR gate is a universal gate. 14. Explain the positive clipper circuit with circuit diagram and waveforms. OR
Draw and explain positive biased clipper with necessary waveforms. 15. Draw series negative clipper circuit with necessary i/p, o/p waveforms. 16. Explain combined clipper circuit using two diodes 17. Write four applications of clipper circuit.
18. Give classification of Logic families and briefly explain Diode transistor logic with two input NAND gate.
19. Explain propagation delay and noise immunity as parameter of digital IC. 20. Describe diode transistor logic with its merits and demerits 21. Describe transistor - transistor logic with its merits and demerits. 22. Draw and explain NOR gate using RTL logic. Give its advantages and disadvantages. 23. Draw and explain NAND gate using CMOS logic. Give its advantages and disadvantages. 24. Explain the working of CMOS -NOR Gate with the help of diagram and give advantages of
CMOS over TTL. 25. State the two advantages of CMOS logic family. OR
State the two advantageous features of CMOS logic family.
Chapter 3 – Boolean Algebra and Combinational Circuits
1. Explain properties of Boolean algebra. OR Explain any four properties of Boolean algebra. OR Write any three boolean algebra properties with related boolean expression.
2. Give answers as per Boolean algebra laws. _ _ A+1=___, A.1=___, A+A=___, A.A=___, A+A=___, A.A=___
3. _ _ _ _ Prove A B + AB + AB + AB = 1
4. Prove that A. (A+B) = A 5. Simplify using Boolean algebra: AB+A(B+C)+B(B+C) 6. Show that using Boolean algebra
(i) AB + CD = (A+C)(A+D)(B+C)(B+D) _ _ _ (ii) A(A+C)(AB+C) = 0
7. Applying laws of Boolean algebra prove that _ _ _ _ _ _ (i) A + AB + AB = A + B (ii) AB + AB + AB + AB + B = 1
8. Show that using Boolean algebra (i) (A+B+AB)(A+C) = A+BC (ii) (X+Y)(X+Z) = X+YZ
9. Prove that AB +ABC + A’B +AB’C = ( B + C ) ( A + B ) 10. Prove that (i) (P+Q)(P+R) = P + QR
_ (ii) XYZ + XY Z + XZ = XZ
11. Briefly explain the Principle of Duality. 12. Explain De Morgan’s Theorem with the help of Logic circuit and truth table. OR
Explain the De Morgan’s theorem. OR Write & explain any one DeMorgan’s theorem with diagram and truth table.
13. Write truth table for a given boolean expression. Y= (A+B).(B+C)
14. Draw logic circuit for the given boolean expression. _ _ _ Y= (A.B) + (B.C) + (C.A)
15. Draw the logic diagram for the given Boolean expressions: _ _ _ _ _ (i) Y = AD + BCD + BCD (ii) Y= ABC + ABC
16. Draw logic circuit for the Boolean expression : _ _ _ ABCD + ABCD+ABCD + ABCD.
17. Draw logic circuit for the Boolean expression : _ _ _ _ Y = (A+B+C).(A B).(ABC)
18. _ _ Draw logic diagram of XY +XY + Z using only NAND gate
19. Describe half adder with logic diagram and truth table. OR Describe half adder with logic diagram.
20. Explain full adder circuit with necessary diagram and truth table. OR Draw the logic circuit of full adder and briefly explain its working with truth table
21. Draw logic diagram for half adder and full adder and explain with truth table. OR Explain Half adder with necessary diagram.
22. Explain Half subtractor circuit with necessary diagram. 23. Draw the logic circuit of Full Subtractor 24. Draw and briefly explain 2 to 1 multiplexer with logic diagram and truth table 25. Explain the 1 to 8 demultiplexer with the help of block diagram and truth table. 26. What is a Decoder? Draw and explain the logic circuit of 3 to 8 decoder and Write its truth table. OR
Draw and explain 3 to 8 Decoder logic circuit with its truth table. OR Write short note on 3 to 8 decoder.
27. Give four applications of decoder in digital system. 28. Write short note on BCD to seven segment decoder.
29. Write in brief about encoders. 30. Draw circuit arrangement for decimal to BCD encoder and explain with truth table. OR
Explain Decimal to BCD Encoder with necessary logic circuit and truth table.
Chapter 4 – Sequential Circuits
1. What is combinational circuit? Compare combinational circuits and sequential circuit. OR Compare combinational circuit with sequential circuit.
2. List various types of flip-flop & explain any one with truth table & diagram. 3. Explain R-S flip flop using logic circuit and truth table. OR
Draw the logic circuit of RS flip flop and write its truth table 4. Write the truth table for R-S flip flop without clock pulse. 5. Write the truth table for D flips flop. 6. List various types of shift register & explain any one with diagram. 7. Explain 4 bit shift left register using JK flip flop. 8. Draw the Logic circuit of JK flip flop and briefly explain its working. 9. Explain JK flip flop with logic circuit and truth table. 10. Explain the race around condition in JK flip flop and list the methods to overcome it. 11. Explain race around condition in JK flip flop and show how it is eliminated in master slave JK
flip flop. 12. Explain J-K master slave flip-flop with its logic circuit and truth table. 13. Explain the race around condition in JK flip flop and list the methods to overcome it. 14. List different types of shift registers. Explain shift right type serial-in-serial-out shift register. 15. List any three applications of Shift registers and decoders each. 16. Explain briefly four basic types of shift registers 17. Describe 4 bit shift left register using JK flip flop. OR
Explain 4-bit shift left register using J-K flip flop. 18. Give any four applications of Counters. 19. Draw decade counter and explain r reset arrangement 20. Explain IC-7490 decade counter. 21. Explain decade counter with wave form. OR
Explain decade counter in brief with circuit & waveforms. 22. Give classification & explain in very brief about memory.
23. Give classification of RAM and give difference between static RAM and dynamic RAM. OR List different types of RAM and give applications of RAM. Compare static RAM with dynamic RAM.
24. List & explain in brief types of ROM. 25. Write any two applications of ROM and RAM each. 26. Compare static RAM with dynamic RAM. 27. Explain random access memory with its classification.
Chapter 5 – A to D And D to A Convertors and Display Devices
1. Describe advantages and disadvantages of weighted resistor D/A converter. 2. Give specifications of D/A Converters. Explain the term resolution with respect to D/A converter. OR
Describe the term linearity, resolution and settling time with reference to D/A converter. OR Write short note on specifications of D to A converter.
3. Write analog output for various digital inputs for a 4-bit D to A converter. 4. Draw block diagram of A/D converter. Explain quantization and encoding. OR
Draw the diagram of any one type of A to D converter. 5. Explain parallel comparator analog to digital converter 6. Briefly explain successive approximation A/D Converter with diagram.
Explain the working of successive approximation A/D converter. 7. Write the advantages and disadvantages of voltage to time conversion type A/D converter 8. State different types of A to D convertor. Explain successive approximation type A to D convertor. 9. Give advantages and disadvantages of LED Display and list any two applications of LED. 10. Explain seven segment LED display 11. Explain common anode type seven segment display. 12. Explain common cathode and common anode type LED display with necessary circuit diagram. 13. Explain the construction and working of LCD 14. Compare LED with LCD.
Chapter 6 – Digital Instruments
1. Write advantages of digital instruments over analog instruments. OR Compare Analog & Digital instruments.
2. List any four building blocks of Digital Instruments 3. Draw and explain block diagram of digital instruments. 4. Explain the working of Digital frequency meter with the help of Block Diagram and waveforms. OR
Draw the block diagram of digital frequency meter and name different blocks. OR Draw and explain block diagram of digital frequency meter. OR Draw the block diagram of digital frequency meter and explain working. OR Draw block diagram of Digital Frequency Meter.
5. Explain ramp type analogue to digital converter digital voltmeter 6. What is the need of Clock and comparator in Digital Instruments?
Laxmi Institute of Technology, Sarigam Approved by AICTE, New Delhi; Affiliated to Gujarat Technological University, Ahmadabad
Academic Year 2018-19 Centre Code:691 Examination : Mid Exam I Semester :IV
Branch :Electrical Date:31.01.2019 Sub Code: 3340904
Sub :D.E.D.I. Time:10.30 AM to 11.30 AM Marks:20 Q-1 Answer any three. 6 1. Convert (15.95)10 in to binary number. 2. Convert (ABCD)16 in to octal number. 3. Perform binary addition (1101011) 2 + (0101101) 2 4. Draw the symbol and truth table of NAND Gate & EX-OR Gate. 5. Give any four advantages of electronic switch Q-2 (A) Give types of Codes. Explain any one in details. 3 OR
(A) (i)Obtain Excess-3 code for (625)10. (ii) Convert (101101)gray into binary.
3
(B) Draw and explain series positive clipper with circuit diagram and necessary waveforms.
3
OR (B) Explain the working of transistor as a switch. 3 Q-3 (A) Using 1’s and 2’s compliment subtract (10110111)2 from (10011101)2. 4 (B) Show that the NAND gate is universal gate. 4 OR (A) Explain the working of diode as a switch. 4 (B) Prove that NOR gate is a universal gate. 4 -૧ કોઈપણ ણના જવાબ લખો ૬
૧. (15.95)10 ને બાયનર નબંરમા ંફરવો. ૨. (ABCD)16 ને ઓ ટલ નબંરમા ંફરવો.
૩. બાઈનર મા સરવાળો કરો (1101011) 2 + (0101101) 2 ૪. NAND ગેટઅને EX-OR ગેટના ચ હ તથા થુ ટબલ દોરો. ૫. ઈલે ોિનક વચના કોઇ ચાર ફાયદાઓ આપો. -૨ (અ) કોડ ના કાર આપો. કોઈ પણ એક કોડ સમ વો. ૩
અથવા (અ) (i) (625)10 માટ એ સેસ-3 કોડ મેળવો. (ii) (101101)gray ે કોડ ને બાયનર મા ંફરવો. ૩
(બ) િસર ઝ પો ઝ ટવ લપર સ રકટ ને ડાયા ામ અને વેવફોમ દોર સમ વો ૩ અથવા (બ) ા ટર ુ ં વચ તર ક કાય સમ વો ૩ -૩
(અ)
1’s અને2’s કો લીમટ નો ઉપયોગ કર ને (10110111)2 ને (10011101)2માથંી બાદ કરો. ૪
(બ) NAND ગેટ િુનવસલ ગેટ છે તે સમ વો. ૪ અથવા (અ) પી. એન . જકંશન ડાયોડ ની વચ તર ક ની કામગીર વ ચગ કર ટ ર ટક દોર સમ વો. ૪
(બ) NOR ગેટ એ િુનવસલ ગેટ છે તે સા બત કરો.
૪
Laxmi Institute of Technology, Sarigam Approved by AICTE, New Delhi; Affiliated to Gujarat Technological University, Ahmadabad
Academic Year 2018-19 Centre Code:691 Examination : Mid Exam I Semester :IV
Branch :Electrical Date: 31.01.2019 Sub Code: 3340904
Sub :D.E.D.I. Time:10.30 AM to 11.30 AM Marks:20 Q-1 Answer any three. 6 1. Convert (15.95)10 in to binary number. 2. Convert (ABCD)16 in to octal number. 3. Perform binary addition (1101011) 2 + (0101101) 2 4. Draw the symbol and truth table of NAND Gate & EX-OR Gate. 5. Give any four advantages of electronic switch Q-2 (A) Give types of Codes. Explain any one in details. 3 OR
(A) (i)Obtain Excess-3 code for (625)10. (ii) Convert (101101)gray into binary.
3
(B) Draw and explain series positive clipper with circuit diagram and necessary waveforms.
3
OR (B) Explain the working of transistor as a switch. 3 Q-3 (A) Using 1’s and 2’s compliment subtract (10110111)2 from (10011101)2. 4 (B) Show that the NAND gate is universal gate. 4 OR (A) Explain the working of diode as a switch. 4 (B) Prove that NOR gate is a universal gate. 4 -૧ કોઈપણ ણના જવાબ લખો ૬
૧. (15.95)10 ને બાયનર નબંરમા ંફરવો. ૨. (ABCD)16 ને ઓ ટલ નબંરમા ંફરવો.
૩. બાઈનર મા સરવાળો કરો (1101011) 2 + (0101101) 2 ૪. NAND ગેટઅને EX-OR ગેટના ચ હ તથા થુ ટબલ દોરો. ૫. ઈલે ોિનક વચના કોઇ ચાર ફાયદાઓ આપો. -૨ (અ) કોડ ના કાર આપો. કોઈ પણ એક કોડ સમ વો. ૩
અથવા (અ) (i) (625)10 માટ એ સેસ-3 કોડ મેળવો. (ii) (101101)gray ે કોડ ને બાયનર મા ંફરવો. ૩
(બ) િસર ઝ પો ઝ ટવ લપર સ રકટ ને ડાયા ામ અને વેવફોમ દોર સમ વો ૩
અથવા
(બ) ા ટર ુ ં વચ તર ક કાય સમ વો ૩ -૩
(અ)
1’s અને2’s કો લીમટ નો ઉપયોગ કર ને (10110111)2 ને (10011101)2માથંી બાદ કરો. ૪
(બ) NAND ગેટ િુનવસલ ગેટ છે તે સમ વો. ૪
અથવા
(અ) પી. એન . જકંશન ડાયોડ ની વચ તર ક ની કામગીર વ ચગ કર ટ ર ટક દોર સમ વો. ૪
(બ) NOR ગેટ એ િુનવસલ ગેટ છે તે સા બત કરો.
૪
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Seat No.: ________ Enrolment No.______________
GUJARAT TECHNOLOGICAL UNIVERSITY DIPLOMA ENGINEERING – SEMESTER –IV• EXAMINATION – SUMMER - 2017
Subject Code: 3340904 Date:03 -05 - 2017
Subject Name: Digital Electronics and Digital Instruments
Time: 10:30 AM TO 01:00 PM Total Marks: 70 Instructions:
1. Attempt all questions.
2. Make Suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Use of programmable & Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.
Q.1 Answer any seven out of ten. દશમ ાંથી કોઇપણ સ તન જવ બ આપો. 14
1. Convert (35.15)10 in to binary number.
૧. (35.15)10 ને બ યનરી નાંબર મ ફેરવો.
2. Using 2’s compliment subtract (11001110)2 from (10110111)2.
૨. 2’s કોમ્પ્લીમેંટ ની રીતથી (11001110)2 ને (10110111)2. મ ાંથી બ દ કરો.
3. Convert (124.CD)16 in binary and decimal number.
૩. (124.CD)16 ને બ યનરી અને ડેસીમલ નાંબર મ ફેરવો.
4. Multiply (1111.1)2 by (10.1)2.
૪. (1111.1)2 ને (10.1)2 થી ગણુ ક ર કરો.
5. Divide (10000111)2 by (101)2 . .
૫. (10000111)2 ને (101)2 થી ભ ગો.
6. Prepare the truth table for EX-OR gate with two inputs.
૬. બે ઇનપટુ વ ળ EX-OR gate નુાં ટ્રુથ ટેબલ તૈય ર કરો.
7. State the four basic types of shift register.
૭. શીફ્ટ રજીસ્ટર ન ચ ર મખુ્ય પ્રક ર જણ વો.
8. State the two advantageous features of CMOS logic family.
૮. CMOS લોજીક ફેમીલી ન બે મખુ્ય ફ યદ જણ વો.
9. Write any two applications of ROM and RAM each.
૯. ROM અને RAM ની બ-ેબે ઉપયોગીત લખો,
10. Give four applications of decoder in digital system.
૧૦. ડડજીટલ સસસ્ટમ મ ડીકોડર ની ચ ર ઉપયોગીત લખો,
Q.2 (a) Describe diode transistor logic with its merits and demerits. 03
પ્રશ્ન. ર (અ) ડ યોડ- ટ્ર ન્ઝીસ્ટર લોજીક તેન ફ યદ અને ગેરફ યદ સ થે સમજાવો. ૦૩
OR
(a) Describe propagation delay, noise immunity and threshold voltage as
parameter of digital IC.
03
(અ) પ્રપોગેસન ડીલ,ે નોઇસ ઇમ્પયનુીટી અને થે્રશોલ્ડ વોલ્ટેજ ડડજીટલ આઇ. સી ન પેર મીટર તરીકે સમજાવો.
૦૩
(b) Explain gray code as non-weighted binary code. 03
2/3
(બ) ગે્ર કોડ ને નોન વેઇટેડ બ યનરી કોડ તરીકે સમજાવો. ૦૩
OR
(b) Explain BCD code. 03
(બ) BCD સમજાવો. ૦૩
(c) Explain the working of transistor as a switch. 04
(ક) ટ્ર ન્ઝીસ્ટર નુાં સ્વીચ તરીકે ક યય સમજાવો. ૦૪
OR
(c) Prepare AND, OR, NOR and NOT gate using NAND gate. 04
(ક) NAND ગેટ વ પરીને AND, OR, NOR અને NOT ગેટ તૈય ર કરો. ૦૪
(d) Explain the De Morgan’s theorem. 04
(ડ) De Morgan નુાં થીયરમ સમજાવો. ૦૪
OR
(d) Explain properties of Boolean algebra. 04
(ડ) Boolean algebra ની પ્રોપટી સમજાવો. ૦૪
Q.3 (a) Describe advantages of Binary ladder D/A converter over weighted resistor
D/A converter.
03
પ્રશ્ન. 3 (અ) બ યનરી લેડર D/A કાંવટયર ન વેઇટેડ રેઝીસ્ટર D/A કાંવટયર પરન ફ યદ વણયવો.
૦૩
OR
(a) Describe the term linearity, resolution and settling time with reference to D/A
converter.
03
(અ) લીનીય રીટી, રીઝોલ્યશુન અને સેટલીંગ ટ ઇમ D/A કાંવટયર ન સાંદભય મ સમજાવો.
૦૩
(b) Compare static RAM with dynamic RAM. 03
(બ) સ્ટેટીક રેમ અને ડ યનેમીક રેમ ની સરખ મણી કરો. ૦૩
OR
(b) Compare combinational circuit with sequential circuit. 03
(બ) કોમ્પબીનેશનલ સકીટ અને સસક્વાંસશયલ સકીટ ની સરખ મણી કરો. ૦૩
(c) Describe decade counter with wave form.
04
(ક) ડીકેડ ક ઉંટર વેવફોમય સ થે વણયવો. ૦૪
OR
(c) Describe 4 bit shift left register. 04
(ક) 4 બીટ શીફ્ટ રજીસ્ટર વણયવો. ૦૪
(d) Simplify following Boolean expression.
C̅D̅ +A̅B̅D̅ + A̅BCD̅ + ACD̅
04
(ડ) નીચેન બલૂીયન expression નુાં સ દુ રૂપ મેળવો.
C̅D̅ +A̅B̅D̅ + A̅BCD̅ + ACD̅
૦૪
OR
(d) Simplify following Boolean expression.
(B +BC) (B + B̅C) (B + D)
04
(ડ) નીચેન બલૂીયન expression નુાં સ દુ રૂપ મેળવો.
(B +BC) (B + B̅C) (B + D)
૦૪
3/3
Q.4 (a) Describe half subtractor with logic diagram. 03
પ્રશ્ન. ૪ (અ) લોજીક ડ ય ગ્ર મ સ થે હ ફ સબટે્રક્ટર વણયવો. ૦૩
OR
(a) Draw logic circuit for the Boolean expression – A̅B̅C̅ +A̅BC +AB̅C + ABC̅ 03
(અ)
આપેલ બલૂીયન expression મ ટે લોજીક સકીટ દોરો. –
A̅B̅C̅ +A̅BC +AB̅C + ABC̅
૦૩
(b) Explain 4:1 multiplexer using NAND gates. 04
(બ) NAND ગેટ ની મદદ થી 4:1 મલ્ટી્લેક્સર સમજાવો.
OR
૦૪
(b) Explain octal to binary encoder. 04
(બ) ઓક્ટલ થી બ યનરી એનકોડર સમજાવો. ૦૪
(c) Explain the race around condition in JK flip flop and master slave JK flip
flop as methods to overcome it.
07
(ક) JK ફ્લીપ ફ્લોપ મ રેસ અર ઉન્ડ કન્ડીશન સમજાવો અને મ સ્ટર સ્લેવ JK ફ્લીપ ફ્લોપ તેન ઉકેલ તરીકે સમજાવો.
૦૭
Q.5 (a) Explain block diagram of digital frequency meter. 04
પ્રશ્ન. ૫ (અ) ડીજીટલ ફ્રીકવન્સી મીટર નો બ્લોક ડ ય ગ્ર મ સમજાવો. ૦૪
(b) Explain common anode type seven segment display. 04
(બ) કોમન એનોડ સ ત સેગમેન્ટ ડીસ્લે સમજાવો. ૦૪
(c) Write advantages of digital instruments over analog instruments. 03
(ક) ડીજીટલ ઇન્સ્ટ્રુમેન્ટ ન એન લોગ ઇન્સ્ટ્રુમેન્ટ પર ન ફ યદ લખો. ૦૩
(d) Explain the quantization and encoding in A/D converter. 03
(ડ) A/D કન્વટયર ન સાંદભય મ ક્વોન્ટ ઇઝેશન અને એનકોડીંગ સમજાવો. ૦૩
************
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Seat No.: ________ Enrolment No.______________
GUJARAT TECHNOLOGICAL UNIVERSITY DIPLOMA ENGINEERING – SEMESTER – IV • EXAMINATION – WINTER- 2016
Subject Code: 3340904 Date: 24- 11- 2016
Subject Name: Digital Electronics & Digital Instruments
Time: 02:30 PM TO 05:00 PM Total Marks: 70 Instructions:
1. Attempt all questions.
2. Make Suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Use of programmable & Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.
Q.1 Answer any seven out of ten. દશમ ાંથી કોઇપણ સ તન જવ બ આપો. 14
1. Convert (1010.11)2 to decimal number.
૧. (1010.11)2 ને ડેસીમલ નાંબરમ ાં બદલો.
2. Convert (100)10 to binary number.
૨. (100)10 ને બ યનરી નાંબરમ ાં બદલો.
3. Multiply (1.01)2 by (10.1)2.
૩. (1.01)2 ને (10.1)2 વડે ગણુો.
4. Divide (1110100)2 by (111010)2.
૪. (1110100)2 ને (111010)2 વડે ભ ગો.
5. Add (100101)2 to (110111)2.
૫. (100101)2 અને (110111)2 નો સરવ ળો કરો.
6. Subtract (111001)2 from (1110001)2.
૬. (1110001)2 મ ાંથી (111001)2 બ દ કરો.
7. Convert (1035)8 to Decimal number.
૭. (1035)8 ને ડેસીમલ નાંબરમ ાં બદલો.
8. Draw electrical equivalent circuit of NOT gate.
૮. નોટ ગેટની ઈલેક્ટ્રિકલ ઈક્રવવેલન્ટ સર્કિટ દોરો.
9. Draw electrical equivalent circuit of AND gate.
૯. એન્ડ ગેટની ઈલેક્ટ્રિકલ ઈક્રવવેલન્ટ સર્કિટ દોરો.
10. Draw series negative clipper circuit with necessary i/p, o/p waveforms.
૧૦. સીરીઝ નેગેર્ટવ ક્રલપર સર્કિટ જરૂરી ઈનપટુ-આઉટપટુ વેવફોમમ સ થે દોરો.
Q.2 (a) Write any three boolean algebra properties with related boolean expression. 03
પ્રશ્ન. ર (અ) કોઈપણ ત્રણ બલુલયન એલ્જીબ્ર ન ગણુધમો જરૂરી બલુલયન એર્રેશન સ થે લખો.
૦૩
OR
(a) Prove AB + AB + AB + AB = 1
03
(અ) સ લબત કરો: AB + AB + AB + AB = 1
૦૩
2/3
(b) Give advantages of electronic switch. 03
(બ) ઈલેરિોનનક ક્્વચન ફ યદ લખો. ૦૩
OR
(b) Explain positive & negative logic with necessary diagram. 03
(બ) પોલઝર્ટવ અને નેગેર્ટવ લોીક જરૂરી આકૃનત સ થે સમજાવો. ૦૩
(c) Explain Half adder with necessary diagram. 04
(ક) હ ફ એડર જરૂરી આકૃનત સ થે સમજાવો ૦૪
OR
(c) Explain Half subtractor circuit with necessary diagram. 04
(ક) હ ફ સબિેરટર જરૂરી આકૃનત સ થે સમજાવો ૦૪
(d) List various types of flip-flop & explain any one with truth table & diagram. 04
(ડ) નવનવધ રક રન ફ્લલપ-લલોપ લખો અને કોઈ એક ટ્રુથ ટેબલ અને આકૃનત સ થે સમજાવો.
૦૪
OR
(d) List various types of shift register & explain any one with diagram. 04
(ડ) નવનવધ રક રન નશલટ રી્ટર લખો અને કોઈ એક આકૃનત સ થે સમજાવો. ૦૪
Q.3 (a) Write & explain any one DeMorgan’s theorem with diagram and truth table. 03
પ્રશ્ન. 3 (અ) દ’મોગમનનો કોઈ એક નનયમ લખો અને જરૂરી આકૃનત અને ટ્રુથ ટેબલ સ થે સમજાવો.
૦૩
OR
(a) Give answers as per Boolean algebra laws.
A+1=___, A.1=___, A+A=___, A.A=___, A+A=___, A.A=___
03
(અ) બલુલયન એલ્જીબ્ર ન નનયમો રમ ણે જવ બ આપો. A+1=___, A.1=___, A+A=___, A.A=___, A+A=___, A.A=___
૦૩
(b) Explain decade counter in brief with circuit & waveforms. 03
(બ) ડીકેડ ક ઉન્ટર જરૂરી આકૃનત અને વેવફોમમ સ થે ટ ાંકમ ાં સમજાવો. ૦૩
OR
(b) Write short note on 3 to 8 decoder. 03
(બ) ટ ાંકનોંધ લખો: ૩ થી ૮ ડીકોડર. ૦૩
(c) List & explain in brief types of ROM. 04
(ક) ROM ના પ્રકાર લખો અને ટ ૂંકમાૂં સમજાવો. ૦૪ OR
(c) Write short note on BCD to seven segment decoder. 04
(ક) ટ ાંકનોંધ લખો: BCD થી સેવન સેગમેન્ટ ડીકોડર. ૦૪
(d) Write analog output for various digital inputs for a 4-bit D to A converter. 04
(ડ) ૪-બીટ ડી ટુ એ કન્વટમર મ ટે નવનવધ ડીીટલ ઈનપટુ મ ટે એન લોગ આઉટપટુ લખો.
૦૪
OR
(d) Write short note on specifications of D to A converter. 04
(ડ) ટ ાંકનોંધ લખો: ડી ટુ એ કન્વટમરન ્પેનસર્ફકેશન. ૦૪
Q.4 (a) Write in brief about encoders. 03
પ્રશ્ન. ૪ (અ) એનકોડર નવશે ટ ાંકમ ાં લખો. ૦૩
OR
3/3
(a) Give classification & explain in very brief about memory. 03
(અ) મેમરીન ુાં વગીકરણ આપો અને ખ બ ટ ાંકમ ાં સમજાવો. ૦૩
(b) Draw the diagram of any one type of A to D converter. 04
(બ) કોઈપણ એક રક રન એ ટુ ડી કન્વટમરની આકૃનત દોરો. ૦૪
OR
(b) Compare LED & LCD display. 04
(બ) એલ.ઈ.ડી. અને એલ.સી.ડી. ર્ડ્્લેને સરખ વો. ૦૪
(c) Prove: NOR gate is universal gate. 07
(ક) સ લબત કરો : નોર ગેટ યનુનવસમલ ગેટ છે. ૦૭
Q.5 (a) Compare Analog & Digital instruments. 04
પ્રશ્ન. ૫ (અ) એન લોગ અને ડીીટલ સ ધનો સરખ વો. ૦૪
(b) Draw block diagram of Digital Frequency Meter. 04
(બ) ડીીટલ ફ્રીકવન્સી નમટરનો બ્લોક ડ ય ગ્ર મ દોરો. ૦૪
(c) Draw logic circuit for the given boolean expression.
Y= (A.B) + (B.C) + (C.A)
03
(ક) આપેલ બલુલયન એર્રેશન મ ટે લોીક સર્કિટ દોરો. Y= (A.B) + (B.C) + (C.A)
૦૩
(d) Write truth table for a given boolean expression.
Y= (A+B).(B+C) 03
(ડ) આપેલ બલુલયન એર્રેશન મ ટે ટ્રુથ ટેબલ લખો. Y= (A+B).(B+C)
૦૩
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Seat No.: ________ Enrolment No.______________
GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING – SEMESTER – IV • EXAMINATION – SUMMER- 2016
Subject Code: 3340904 Date: 20- 05- 2016 Subject Name: Digital Electronics and Digital Instruments Time: 10:30 AM TO 01:00 PM Total Marks: 70 Instructions:
1. Attempt all questions. 2. Make Suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. 4. Use of programmable & Communication aids are strictly prohibited. 5. Use of only simple calculator is permitted in Mathematics. 6. English version is authentic.
Q.1 Answer any seven out of ten. દશમાથંી કોઇપણ સાતના જવાબ આપો. 14
1. Convert the given decimalnumbers into binary numbers (a) 256 (b) 210
૧. આપેલ ડેિસમલ નબંર ને બાઈનરી નબંર મા પાતંિરત કરો (અ) 256 (બ) 210
2. Give any four advantages of electronic switch. ૨. ઈલેક્ટ્રોિનક િ વચ નાકોઇ ચાર ફાયદાઓ આપો.
3. Draw the symbol and truth table of NAND Gate & EX-OR Gate ૩. NAND ગેટઅને EX-OR ગેટના િચ હો તથા થ ટેબલ દોરો.
4. Draw the logic circuit of Full Subtractor ૪. લ સબટે્રક્ટર ની લોિજક સરિકટ દોરો.
5. Prove that A. (A+B) = A ૫. સાિબત કરો કે A . (A+B) = A
6. Briefly explain the Principle of Duality ૬. ડ આુિલટી નો િસ ાતં ટૂંક મા સમજાવો.
7. Draw the logic circuit of RS flip flop and write its truth table ૭. RS િ લપ લોપ નો લોિજક સરિકટ દોરો અને એની થ ટેબલલખો
8. List any four building blocks of Digital Instruments ૮. િડિઝટલ સાધનો ના કોઇ ચાર િબિ ડંગ લોક લખો.
9. What is the need of Clock and comparator in Digital Instruments? ૯. િડિઝટલ સાધનો મા ક્લોક અને કમપેરેટર ની આવ યક્તા શ ુછે.
10. Give any four applications of Counters.
૧૦. કાઉંટર ના કોઇ ચાર ઉપયોગો આપો.
Q.2 (a) Explain working of PN Junction Diode as switch with switching characteristics
03
. ર (અ) પી. એન . જ કશન ડાયોડ ની િ વચ તરીકે ની કામગીરીિ વિચંગ કેરેક્ટિરિ ટક દોરી સમજાવો .
૦૩
OR (a) Explain the positive clipper circuit with circuit diagram and waveforms. 03
2/4
(અ) પોિઝિટવ િક્લપર સરિકટ ને ડાયગ્રામ અને વેવફોમર્ દોરી સમજાવો . ૦૩
(b) Draw the Logic circuit of JK flip flop and briefly explain its working. 03 (બ) . કે િ લપ લોપ નો લોિજક સરિકટ દોરો અને એની કાયર્ કરવાની રીત
સમજાવો. ૦૩
OR (b) What is combinational circuit? Compare combinational circuits and
sequential circuit. 03
(બ) કોિ બનેશનલ સરિકટ શ ુછે?કોિ બનેશનલ સરિકટ અને સીક્વેંશનલ સરિકટ ની સરખામણી કરો .
૦૩
(c) (i) Convert the following decimal numbers into hexadecimal numbers (a) 3558 (b) 6708
(ii) perform binary addition (a) (1101011) 2 + (0101101) 2 (b) (0001001) 2 + (0101100) 2
04
(ક) (i) આપેલ ડેિસમલ નબંર ને હકે્સ નબંર મા પાતંિરત કરો (અ) ૩૫૫૮ (બ) ૬૭૦૮ (ii) બાઈનરીમા સરવાણો કરો (અ) (11101011) 2 + (10101101) 2
(બ) (10001001) 2 + (00101100) 2
૦૪
OR (c) Answer the following
(a) 73BD + 2A9F (b) (1110001) 2 - (1111011) 2
(c) (28)10 = ( )16 (d) (10110110) 2 = ( ) 16
04
(ક) જવાબ આપો (અ) ) 73BD + 2A9F (બ) (1110001) 2 - (1111011) 2
(સ) (28)10 = ( )16 (ડ)(10110110) 2 = ( ) 16
૦૪
(d) Explain De Morgan’s Theorem with the help of Logic circuit and truth table 04 (ડ) ડી– મોરગન થીયરમ ને લોિજક સરિકટ અને થ ટેબલ ની મદદ થી
સમજાવો ૦૪
OR (d) Prove that AB +ABC + A’B +AB’C = ( B + C ) ( A + B ) 04 (ડ) સાિબત કરો કે AB +ABC + A’B +AB’C = ( B + C ) ( A + B )
૦૪
Q.3 (a) Draw the logic circuit of full adder and briefly explain its working with truth table.
03
. 3 (અ) ` લ એડર ની લોિજક સરિકટ દોરી એની કાયર્ કરવાની રીત થ ટેબલની મદદ થી સમજાવો.
૦૩
OR (a) Draw and briefly explain 2 to 1 multiplexer with logic diagram and truth table 03
3/4
(અ) 2 to 1મ ટી લેક્સર ને લોિજક ડાયગ્રામ અને થ ટેબલ દોરી ટૂંકમા સમજાવો.
૦૩
(b) Explain briefly four basic types of shift registers 03 (બ) િશ ટ રિજ ટસર્ ના ચાર મળૂ પ્રકાર િવશે ટૂંકમા સમજાવો. ૦૩
OR (b) List any three applications of Shift registers and decoders each. 03 (બ) િશ ટ રિજ ટસર્ અને ડીકોડસર્ર બ ે ના કોઇ ત્રણ ઉપયોગો લખો.
૦૩
(c) Give specifications of D/A Converters. Explain the term resolution with respect to D/A converter.
04
(ક) િડઝીટલ થી એનાલોગ ક વરટસર્ ના પેિસિફકેશ સ આપો અને રીઝો યશૂન ને િડઝટલ ટુ એનાલોગ ક વરટસર્ ના સદંભર્ મા સમજાવો.
૦૪
OR (c) Briefly explain successive approximation A/D Converter with diagram. 04 (ક) સક્સેિસવ એપ્રોિક્સમેશન એનાલોગ ટુ િડઝીટલક વરટસર્ ને ડાયગ્રામ દોરી
ટૂંકમા સમજાવો . ૦૪
(d) Give advantages and disadvantages of LED Display and list any two applications of LED.
04
(ડ) એલ. ઈ . ડી િડસ લે ના ફાયદાઓ અને ગેરફાયદાઓ આપો તથા એલ. ઈ . ડી ના કોઇ બે ઉપયોગો લખો.
૦૪
OR (d) Give classification of RAM and give difference between static RAM and
dynamic RAM. 04
(ડ) રેમ નો વગીર્કરણ આપો અને ટેિટક રેમ અને ડાયનેિમક રેમ વ ચે ભેદ આપો ૦૪
Q.4 (a) What is a Decoder? Draw and explain the logic circuit of 3 to 8 decoder and Write its truth table.
03
. ૪ (અ) ૩ થી ૮ ડીકોડર ની લોિજક સરિકટ દોરી સમજાવો અને એની થ ટેબલ લખો. ૦૩
OR (a) Drawthe logic circuit of NOR gate, EX- OR gate and OR gate using NAND
gate. 03
(અ) NAND ગેટ નો ઉપયોગ કરીને નોર ગેટ, એક્સ – ઓર ગેટ અને ઓર ગેટ નો લોિજક સરિકટ દોરો.
૦૩
(b) Give classification of Logic families and briefly explain Diode transistor logic with two input NAND gate.
04
(બ) લોિજક પિરવારનો વગીર્કરણ આપોઆપો અને બે ઈનપટુ NAND ગેટ સાથે ના ડાયોડ ટ્રાિંઝ ટર લોિજકને ટૂંક મા સમજાવો .
૦૪
OR (b) Explain the 1 to 8 demultiplexer with the help of block diagram and truth
table. 04
(બ) ૧ થી ૮ ડીમ ટી લેક્સરને લોક ડાયગ્રામ અને થ ટેબલ ની મદદ થી સમજાવો.
૦૪
(c) Give types of Counters. Explain Decade Counter (Modulo 10 ) with the help 07
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of Logic Diagram , truth table and waveforms (ક) કાઉ ટસર્ ના પ્રકાર આપો . ડીકેડ કાઉ ટસર્ ( મોડ લુો ૧૦) ને લોિજક
ડાયગ્રામ, થ ટેબલ અને વેવફોમર્ દોરી સમજાવો. ૦૭
Q.5 (a) Give types of Codes. Explain any one in details. 04
. ૫ (અ) કોડ ના પ્રકાર આપો. કોઈ પણ એક કોડ સમજાવો. ૦૪
(b) Explain the working of CMOS -NOR Gate with the help of diagram and give advantages of CMOS over TTL.
04
(બ) CMOS –NOR ગેટ ની કાયર્ કરવાની રીત ડાયગ્રામ દોરી સમજાવો અને TTL ઉપર CMOS ના ફાયદાઓ આપો.
૦૪
(c) Explain the construction and working of LCD 03 (ક) L.C.D ની રચના અને કાયર્ કરવાની રીત સમજાવો. ૦૩
(d) Explain the working of Digital frequency meter with the help of Block Diagram and waveforms.
03
(ડ) િડિઝટલ ફ્રીક્વેંસી મીટર ની કાયર્ કરવાની રીત લોક ડાયગ્રામ અને વેવફો સર્ દોરી સમજાવો.
૦૩
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