Digital Electronics
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SYLLABUS (Detailed Contents):
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Module 1:
NUMBER SYSTEMS: Binary, Octal, Decimal, Hexadecimal. Number base
conversions, 1’s, 2’s complements, signed Binary numbers. Binary Arithmetic, Binary
codes: Weighted BCD, Gray code, Excess 3 code, ASCII.
LOGIC GATES: AND, OR, NOT, NAND, NOR, Exclusive-OR and Exclusive-NOR.
Implementations of Logic Functions using gates, NAND-NOR implementations.
Module 2 :
BOOLEAN ALGEBRA: Boolean postulates and laws – De-Morgan’s Theorem,
Principle of Duality, Boolean expression – Boolean function, Minimization of Boolean
expressions – Sum of Products (SOP), Product of Sums (POS), Minterm, Maxterm,
Canonical forms, Conversion between canonical forms, Karnaugh map Minimization,
Don’t care conditions, Quine-McCluskey method
Module 3:
COMBINATIONAL CIRCUITS: Design procedure – Adders, Subtractors, BCD
adder, Magnitude Comparator, Multiplexer/Demultiplexer, encoder/decoder, parity
checker, code converters. Implementation of combinational logic using MUX, BCD to
7 segment decoder.
SEQUENTIAL CIRCUITS: Flip flops SR, JK, T, D and Master-slave, Excitation table,
Edge triggering, Level Triggering, Realization of one flip flop using other flip flops.
Asynchronous/Ripple counters, Synchronous counters, Modulo-n counter, Ring
Counters. Design of Synchronous counters: state diagram, a Circuit implementation.
Shift registers.
Module 4:
MEMORY DEVICES: Classification of memories, RAM organization, Write operation,
Read operation, Memory cycle. ROM organization, PROM, EPROM, EEPROM,
Programmable logic array, programmable array logic, complex Programmable logic
devices (CPLDS), Field Programmable Gate Array (FPGA).
A/D & D/A CONVERTORS : Analog & Digital signals. sample and hold circuit, A/D
and D/A conversion techniques (Weighted type, R-2R Ladder type, Counter Type,
Dual Slope type, Successive Approximation type).
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