**3EE3A DIGITAL ELECTRONICS (Common to EE, EX, EC, EIC, CS and IT)**

**Unit 1**

Number Systems, Basic Logic Gates & Boolean Algebra: Binary Arithmetic & Radix
representation of different numbers. Sign & magnitude representation, Fixed point
representation, complement notation, various codes & arithmetic in different codes & their inter
conversion. Features of logic algebra, postulates of Boolean algebra.Theorems of Boolean
algebra.Boolean function. Derived logic gates: Exclusive-OR, NAND, NOR gates, their block
diagrams and truth tables. Logic diagrams from Boolean expressions and vica-versa. Converting
logic diagrams to universal logic. Positive, negative and mixed logic.Logic gate conversion.

**Unit 2**

Digital Logic Gate Characteristics: TTL logic gate characteristics: Theory & operation of TTL
NAND gate circuitry. Open collector TTL. Three state output logic. TTL subfamilies.MOS &
CMOS logic families. Realization of logic gates in RTL, DTL, ECL, C-MOS & MOSFET.
Interfacing logic families to one another.

**Unit 3**

Minimization Techniques: Minterm, Maxterm, Karnaugh Map, K map upto 4 variables.
Simplification of logic functions with K-map, conversion of truth tables in POS and SOP form.
Incomplete specified functions. Variable mapping.Quinn-McKlusky minimization techniques.

**Unit 4**

Combinational Systems: Combinational logic circuit design, half and full adder, subtractor.
Binary serial and parallel adders.BCD adder.Binary multiplier. Decoder: Binary to Graydecoder,
BCD to decimal, BCD to 7-segment decoder. Multiplexer, demultiplexer, encoder.Octal to
binary, BCD to excess-3 encoder.Diode switching matrix.Design of logic circuits by
multiplexers, encoders, decoders and demultiplexers.

**Unit 5**

Sequential Systems: Latches, flip-flops, R-S, D, J-K, Master Slave flip flops. Conversions of
flip-flops. Counters: Synchronous & asynchronous ripple and decade counters, Modulus counter,
skipping state counter, counter design, state diagrams and state reduction techniques. Ring
counter. Counter applications. Registers: buffer register, shift register.

**Suggested Readings:**

1. Digital Integrated Electronics, By Herbert Taub, Donald L. Schilling, TMH

2. Digital Logic and Computer Design By M. Morris Mano, Pearson

3. Pulse Switching and Network By MillmanTaub, TMH

4. Fundamentals of Digital circuits By A. Anandkumar, PHI

5. Digital Funadamentals by Floyd, Pearson

6. Digital circuit design By S. Salivahanan, Sarivazhagan, Vikas publications

7. Leach, Digital Principles and Applications, ed. 7, TMH Mandal, Digital Electronics:
Principles and Applications, TMH