DE (Diploma Electrical Engineering 3rd)

1. Introduction To Digital Techniques 10 hrs

Digital circuit., Digital signal, Use of digital circuit and digital signal, Advantages

and Disadvantages of Digital circuits, Number System - Introduction to Binary,

Octal, Decimal, Hexadecimal number system. Conversion of number systems,

1’s complement and 2’s complement, Binary arithmetic (addition, subtraction).

BCD code, BCD arithmetic (addition, subtraction).

 Introduction to A/D and D/A Converters.

2. Logic Gates And Boolean Algebra 09 hrs

Logical symbol, logical expression and truth table of AND, OR, NOT, NAND,

NOR, EX- OR and EX-NOR gates, Universal gates – NAND and NOR gate,

Logical circuits of basic gates using universal gates, Basic laws of Boolean

algebra, Duality theorem, De Morgan’s theorems.

3. Combinational Logic Design / Circuits 16 hrs

Simplification of Boolean expression using Boolean algebra. Construction of

logical circuits forms Boolean expressions. Boolean expressions using Sum of

products and product of sums forms. K-map representation of logical functions.

Minimization of logical expressions using K-map ( 2, 3, 4 variables).

Standardization of SOP & POS equations. Concept of Adders / Subtractors.

Truth table, K-map, Simplified logical expression and logical circuit using basic

gates and universal gates of:

 (a) Half adder and full adder.

 (b) Half subtractor and full subtractor.

Block diagram, Truth table, Logical expression and logic diagram of

Multiplexers (4:1 and 8:1), Multiplexer IC. Block diagram and Truth table of

Demultiplexer (1:4; 1:8; 1:16), Demultiplexer IC. Block diagram, Truth table,

working principle of Encoders & Decoders

4. Flip Flops And Sequential Logic Design 24 hrs

One-bit memory cell, clock signal, Symbol and Logic diagram using NAND

gates, working and truth table of R S flip- flop. Symbol and Logic diagram using

NAND gates, working, truth table and timing diagram of Clocked R S flip flop.

Triggering: edge triggering and level triggering, Symbol and Logic diagram using

NAND gates, working, truth table and timing diagram of J-K flip flop.Block

diagram and truth table of Master slave J-K flip flop. Symbol, working and truth

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table of D- flip flop and T-flip flop. Applications of flip flops, Concept, Modulus,

Working, truth table, timing diagram of a counter. Asynchronous counter (3 bit, 4

bit); Design of mod N-counter: working, truth table and timing diagram, 3-bit

Synchronous counter: working, truth table and timing diagram, Block diagram,

Working, Truth Table and waveforms of Shift register: SISO, SIPO, PISO, PIPO

(4-bit) and Universal Shift register (4-bit). Applications of Counters and

Registers.

5. Memories 05 hrs

Classification of memories RAM, ROM, PROM, EPROM, E2PROM.Circuit

diagram and working of Static and dynamic RAM