III YEAR – VI SEMESTER
COURSE CODE: 7BPH6C2
CORE COURSE XIV – DIGITAL ELECTRONICS
Unit I FUNDAMENTALS
Codes and Number Systems–Decimal, Binary, Octal and Hexadecimal number systems–Inter conversions–8421BCD code–Other 4 bit BCD codes–Excess 3 code–Graycode
Basic LOGIC gates – AND, OR, NOT, NAND, EX-OR functions – their truth tables. NAND & NOR as Universal gates – De Morgan's theorem – Boolean Algebra - associative law, commutative law and distributive law.
Unit II COMBINATIONAL LOGIC
Binary Arithmetic Circuits – Half Adder – Full Adder– 8421 BCD Adder – Half Subtractor – Full Subtractor.
Simplification of Boolean functions – algebraic simplification – AND-OR logic – NAND-NAND net work – OR – AND logic – NOR-NOR network – Sum of Products & Product of Sums – Karnaugh mapping of two, three, four variables – Don't care conditions
Unit III SEQUENTIAL LOGIC
Flip-Flop – R-S Flip-Flop – Clocked R-S Flip-Flop – D Flip-Flop- J-K Flip-Flop.
Registers & Counters : Registers – Shift Registers – Shift Right, Shift Left Registers – Counters – Ring counter – Asynchronous (Ripple) Counter – Mod 10 counter – up counter – down counter – Synchronous Counter – Different modulli Counters.
Unit IV D/A AND A/D CONVERTERS
Introduction – Variable resistor network – Binary ladder – D/A Converter – D/A accuracy and resolution
A/D converter : Simultaneous conversion – counter method – successive approximation – A/D accuracy and resolution.
Unit V MEMORY CIRCUITS AND MICROPROCESSORS
Programming bipolar PROMS – MOS static RAM cell – MOS dynamic RAM cell.
Microprocessors: Introduction to microprocessor - internal architecture of Intel 8085 microprocessor - Block diagram – Registers - internal Bus organization- functional details of 8085 IC pins and Control signals.
Text Books:
1. Integrated Electronics – Millman and Halkias, International Ed., McGraw Book Co., New Delhi, 1972.
2. Digital Principles and Application – Malvino and Leach, , 4th Ed., Tata McGraw Hill, VI Edn, New Delhi, 2008.
3. Fundamentals of Digital Electronics and Microprocessor– Anokh Singh and A.K. Chabra, , S.Chand and Co Ltd, II Edn., New Delhi, 2005.
Books for Reference:
1. Digital Technology Principle and Practice – Virendra Kumar, New Age International Pvt. Ltd., New Delhi, 2005.
2. Digital Fundamentals – Floyd and Jain, Pearson Edn. Singapore, 2006
3. Digital Circuits and Logic Design – Samuel.C.Lee, Prentice Hall of India Pvt.Ltd, New Delhi, 2005