Digital Electronics — What This Subject Is About
To expose students to the design process of combinational and sequential logic circuits, giving a strong foundation for all modern electronic devices and digital systems, and a profile for work in hardware and process industries.
Subject 3.2 (Theory) + 3.6 (Lab) • Total 200 Marks • 5 Credits • 3rd Semester — Electronics Engineering • Session 2026–27
About this document: Digital Electronics appears twice in the 3rd semester — as a theory paper (3.2) and as a lab (3.6). Both are covered here, completely, in the official order.
What You Will Study
Unit 1 — Number Systems & Boolean Algebra (8 Periods, 19%)
Introduction to different number systems – Binary, Octal, Decimal, Hexadecimal. Conversion between the number system, 1’s complement and 2’s complement, Binary Addition and Subtraction. Special Codes: BCD, Gray Codes, ASCII codes. Boolean Algebra: Basic Boolean laws, De-Morgan’s Theorem, SOP and POS representation
How computers count (binary, octal, hexadecimal), how negative numbers are stored, and the algebra that describes logic.
Unit 2 — Logic Gates (8 Periods, 19%)
Logic Gates – NOT, AND, OR, NAND, NOR, XOR, XNOR: Symbol, Logical expression and truth table. Implementation of Boolean expressions and Logic Functions using gates; Simplification of Boolean expressions using Karnaugh Maps (up to 4 variables).
The seven basic gates, their symbols and truth tables, and K-maps — a visual shortcut for simplifying logic.
Unit 3 — Combinational Logic Circuits (8 Periods, 19%)
Half Adder, Full Adder, Half Subtractor, Full Subtractor, Multiplexer – 2 to 1 MUX, 4 to 1 MUX, 8 to 1 MUX., Demultiplexer – 1 to 2 DEMUX, 1 to 4 DEMUX, Decoder, Encoder. Parity generator and checker.
Circuits whose output depends only on the present inputs: adders, subtractors, multiplexers, decoders, and error-checking parity circuits.
Unit 4 — Sequential Logic Circuits (10 Periods, 24%)
Basic Latches using NAND and NOR gates, Triggering and types of triggering. Flip Flops – SR, JK, T, D Flip Flops, JK-MS Flip Flops. Counters – Definition and types of counters, difference between asynchronous and synchronous counters, logic diagram, truth table and operation of Decade Counter, Johnson Counter and Ring Counter, applications of counters. Registers –: Types of register, Serial in Serial Out, Serial in Parallel Out, Parallel in Serial Out, Parallel in Parallel Out, applications of registers
Circuits with memory: flip-flops that store one bit, counters that count pulses, and registers that hold and shift data.
Unit 5 — Memory Devices (8 Periods, 19%)
Classification of Memories – RAM Organization, Address Lines and Memory Size, SRAM, DRAM, Read Only memory – ROM organization, PROM, EPROM, EEPROM, Flash memory. Data Converters – Introduction: Digital to Analog converters, Analog to Digital Converters.
How digital systems store data (RAM, ROM and their variants) and how the digital world talks to the analog world through ADCs and DACs.
Practical Work
- Verification of Demorgan’s Theorems.
- To verify the truth tables for all logic Gates– NOT,OR,AND,NAND,NOR, X-OR, X-NOR Gates.
- Realization of Logic Gates using universal Gates.
- Design and verification of the truth tables of Half and Full Adder circuits.
- Design and verification of the truth tables of Half and Full Subtrator circuits.
- Design and verification of the truth tables of 4 to 1 Multiplexer (74150) and 1 to 4 De-Multiplexer (74154) circuits.
And more — the complete list of 15 practicals is inside the PDF.
Complete Syllabus
The full examination scheme, the complete practicals list and the reference books from the official syllabus. The unit-wise topics are in the "What You Will Study" section above.
Examination Scheme
| Code | Paper | Type | L – P | Credits | Internal | External | Total |
|---|---|---|---|---|---|---|---|
| 3.2 | Digital Electronics | Theory | 3 – 0 | 3 | Theory 40 | Theory 60 (3 hrs) | 100 |
| 3.6 | Digital Electronics (Lab) | Practical | 0 – 4 | 2 | Practical 60 | Practical 40 (3 hrs) | 100 |
| Digital Electronics Total | 5 | 100 | 100 | 200 | |||
Units at a Glance
| Unit | Topic | Periods | Marks Share |
|---|---|---|---|
| 1 | Number Systems & Boolean Algebra | 8 | 19% |
| 2 | Logic Gates | 8 | 19% |
| 3 | Combinational Logic Circuits | 8 | 19% |
| 4 | Sequential Logic Circuits | 10 | 24% |
| 5 | Memory Devices | 8 | 19% |
Complete Practicals List
This is the complete list of practicals from the official syllabus.
- Verification of Demorgan’s Theorems.
- To verify the truth tables for all logic Gates– NOT,OR,AND,NAND,NOR, X-OR, X-NOR Gates.
- Realization of Logic Gates using universal Gates.
- Design and verification of the truth tables of Half and Full Adder circuits.
- Design and verification of the truth tables of Half and Full Subtrator circuits.
- Design and verification of the truth tables of 4 to 1 Multiplexer (74150) and 1 to 4 De-Multiplexer (74154) circuits.
- To convert a given octal input to the binary output and to study the LED display using 7447 7-segment decoder.
- Construct and test the performance of parity generator.
- Design and test of an S-R flip-flop using NOR/NAND gates.
- Design and test of an J-K flip-flop using NOR/NAND gates.
- Design and test of an T flip-flop using NOR/NAND gates.
- Construct and test the performance of Decade counter.
- Design a Programmable Up-Down Counter with a 7 Segment Display.
- Design of 4-bit shift register.
- To conduct an experiment to store a set of data in a RAM using IC 2114 starting from location ……..to location …… and retrieve the same data.
Reference Books
As listed in the syllabus:
- Digital principles & Applications Albert Paul Malvino& Donald P. Leach McGraw Hill Education; Eighth edition ISBN: 978-9339203405
- Digital Electronics Roger L. Tokheim Macmillian McGraw-Hill Education (ISE Editions); International 2 Revised edition ISBN: 978-0071167963
- Digital Electronics – an introduction to theory and practice William H. Gothmann Prentice Hall India Learning Private Limited; 2 edition ISBN: 978-8120303485
- Fundamentals of Logic Design Charles H. Roth Jr. Jaico Publishing House; First edition ISBN: 978-8172247744
- Digital Electronics R. Anand Khanna Publications, New Delhi (Edition 2018) ISBN: 978-93-82609445
- Rahul Wadhwa, Digital Electronics, Asian Publishers, Muzaffarnagar. ISBN: 978-93-91541-21-7
Frequently Asked Questions
How many marks is Digital Electronics worth in the 3rd semester?
Digital Electronics (3.2) is 100 marks; Digital Electronics (Lab) (3.6) is 100 marks. Total: 200 marks, 5 credits. The full scheme table is in the Complete Syllabus section above.
Which units carry the most weightage in Digital Electronics?
Sequential Logic Circuits, 24% each. The full unit-wise weightage table is in the Complete Syllabus section above.
What practical work is there in Digital Electronics?
15 practicals/experiments, including: Verification of Demorgan’s Theorems.; To verify the truth tables for all logic Gates– NOT,OR,AND,NAND,NOR, X-OR, X-NOR Gates.; Realization of Logic Gates using universal Gates.. The complete list is in the Complete Syllabus section above.
Which books should I refer to for Digital Electronics?
The syllabus lists Digital principles & Applications Albert Paul Malvino& Donald P. Leach McGraw Hill Education; Eighth edition ISBN: 978-9339203405, and Digital Electronics Roger L. Tokheim Macmillian McGraw-Hill Education (ISE Editions); International 2 Revised edition ISBN: 978-0071167963, among others. The full list is in the Complete Syllabus section above.
Is Digital Electronics a theory subject or a practical subject?
It is assessed as practical and theory — see the examination scheme in the Complete Syllabus section above.
How can I download the Digital Electronics syllabus PDF?
The PDF is free to download — use the download link in the Download section below. It is prepared by KAMALDNP Academy from the official BTEUP syllabus.
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Download the Digital Electronics Syllabus PDF
Download the complete Digital Electronics syllabus PDF below — prepared by KAMALDNP Academy, with the full topic list, practicals and reference books.
Download the Digital Electronics Syllabus PDF
Source: BTEUP 2nd Year curriculum (folder2627), approved in C.D.C. meeting held on 16.07.2026. Topic lists follow the official syllabus; short explanations are the author's own plain-English summaries, not syllabus text. Please confirm with your own polytechnic for any local changes.
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