Digital Circuits & System (IT-305)
Course Objectives
1 Understand working of logic gates.
2 To design and implement combinational and sequential logic circuits
3 Understand the process of analog to digital and digital to analog conversion
4 To understand various logic families
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B.Tech RGPV notes AICTE flexible curricula Bachelor of technology
Syllabus
UNIT 1:
Number systems and logic gates: Decimal, Binary, Octal, Hexadecimal number systems
and radix conversion. Codes- BCD, excess 3, gray, ASCII. Boolean algebra- Theorems and
properties, Boolean functions, canonical and standard forms, De Morgans theorem, digital logic
gates, Karnaugh maps.
UNIT 2:
- Combinational circuits: Introduction to combinational circuits, multilevel NAND, NOR
implementation. Designing binary Adders and Subtractors. Decoder, Encoder, Multiplexer,
Demultiplexer circuits
UNIT 3:
Sequential circuits: Introduction to Sequential circuits, flip-flops, RS, D, T, JK, M/S
JK-flipflops, truth tables, excitation tables and characteristic equations, clocked and edge
triggered flipflops, Registers- Definition, serial, parallel, shift left/right registers, Johnson
counter, asynchronous and synchronous counters.
UNIT 4:
Digital logic families: Bipolar and unipolar logic families, Digital IC specifications,
RTL, DTL, All types of TTL circuits, ECL, IIL, PMOS, NMOS & CMOS Logic.
UNIT 5:
Clocks and timing circuits: Bistable, Monostable & Astable multivibrator, Schmitt
trigger circuit, Introduction of Analog to Digital & Digital to Analog converters, Display
devices, 7 and 16 segment LED display, LCD.
NOTES
- Unit 1
- Unit 2
- Unit 3
- Unit 4
- Unit 5
Course Outcomes
On the completion of this course
1 Students will be able to perform number base conversions, use Boolean logic to create digital
circuits.
2. Student can understand use of encoders, decoders, multiplexers and demultiplexers in
communication systems.
3 By learning design of combinational and sequential circuits student can understand its use in
digital systems such as computers, communication systems and other modern technologies.
4 Study of ADC and DAC along with display devices will enable students to understand signal
conversion and its display and their applications in digital devices.
Reference Books:
1. M. Morris Mono, “Digital logic design”, Pearson Education Pvt. Ltd.
2. A Anand Kumar, “Fundamentals of digital circuits“, PHI Learning Pvt Ltd.
3. A K Maini, “Digital Electronics Principles and Integrated Circuits, Wiley India Pvt Ltd.
4. R P Jain, “Modern Digital Electronics”, Tata McGraw-Hill publishing company Ltd.
5. D P Kothari and J S Dhillon, "Digital Circuits and Design", Pearson Education Pvt. Ltd.
List of Experiments:
1. Study and verify the operation of AND, OR, NOT, NOR and NAND logic gates.
2. Design all basic logic gates using NOR universal gate.
3. Design all basic logic gates using NAND universal gate.
4. Verification of Demorgan’s theorem.
5. Construction and verification of half adder andfull adder circuits.
6. Construction and verification of half subtractor and full subtractor circuits.
7. Design of Binary to Grey & Grey to Binary code Converters .
8. Design of BCD to excess-3 code converter.
9. Design and verification of Multiplexer circuit
10. Design and verification of De-multiplexer circuit.
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