RTU 3rd sem Electronics And Communication Engineering B.Tech. Syllabus Digital Electronics

3EC3A Digital Electronics

Unit I

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 II

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 III

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-Mc Klusky minimization techniques.

Unit IV

COMBINATIONAL SYSTEMS - Combinational logic circuit design, half and full
adder, subtractor. Binary serial and parallel adders. BCD adder. Binary multiplier.
Decoder: Binary to Gray decoder, 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 V

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.