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Digital Electronics (EC2203) Scanned Lecture Notes (All Units) - THENMOZHI Edition
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Anna University , Chennai
Department of B.E-Electronics and Communication Engg
Third Semester
EC2203 Digital Electronics 
Scanned Lecture Notes
(Regulation 2008)

UNIT-1

MINIMIZATION TECHNIQUES AND LOGIC GATES
  • Laws of Boolean algebra
  • Basic theorems and properties of Boolean algebra
  • Demorgan’s theorems
  • Consensus theorem
  • M-notification
  • Karnaugh map minimization: (k-map)
  • Quine-mccluskey method of minimization
  • Logic gates
  • Comparison of CMOS-TTL families
UNIT-2

COMBINATION CIRCUITS
  • Introduction
  • Design procedure
  • Multiplexers
  • De multiplexers
  • Decoders
  • Encoders
  • Priority encoder
  • Code converters
  • 1. Binary to BCD converter
  • 2. BCD to binary converters
  • 3. BCD to excess-3
  • 4. Excess-3 to BCD
  • 5. Binary to gray
  • 6. Gray to binary
  • Magnitude comparator
UNIT-3

SEQUENTIAL CIRCUITS
  • Introduction
  • Latches
  • Types
  • Edge triggering
  • Conversion of flip-flops
  • Application of flip-flops
  • Counters
  • Sequence generators
  • Shift register counter
  • Ring counter
  • Universal shift register
  • Synchronous counters
  • Shift registers
  • Types 
  • Application
Unit-4

MEMORY DEVICES
  • Introduction
  • Memory unit
  • Memory operation
  • Write operation
  • Read operation
  • Classification of memories
  • RAM: (random access memory)
  • SRAM (static RAM)
  • RAM organization
  • Static RAM cell
  • MOSFET RAM cell
  • Dynamic RAM cell
  • ROM cell
  • PROM: (programmable ROM)
  • EPROM (erasable PROM)
  • EEPROM
  • Memory cycle
  • 1. Read cycle
  • 2. Write cycle
  • Memory decoding
  • 1. Absolute decoding
  • 2. Linear decoding
  • Memory expansion
  • Advantages of RAM, ROM
  • Disadvantages of RAM, ROM
  • PLD-Programmable Logic Devices
  • Classification of PLDs
  • Types
  • Implementation of combinational circuit using PLA
  • Field programmable GATE array (FPGA)
UNIT-5

SYNCHRONOUS AND ASYNCHRONOUS SEQUENTIAL CIRCUITS
  • Introduction
  • Moore model
  • Melay model
  • Analysis of synchronous sequential circuits
  • Design with JK flip flops
  • Algorithm state machine chart
  • Asynchronous sequential circuits
  • Types
  • Design of pulse mode asynchronous sequential circuits
  • Problems in asynchronous circuits

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