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EX-403 Digital Electronics Logic Design Notes

5 notes for Digital Electronics Logic Design, unit by unit.

Unit 1 · Short notes Number Systems and Codes Digital number systems, base conversion, binary, decimal, octal, hexadecimal, number system with radix r, Gray codes · Alphanumeric codes – ASCII code and BCD codes, concept of parity, complement r's & (r‑1)'s, subtraction with complements, signed binary numbers, error detecting & correcting codes · Basic theorems and properties of Boolean algebra: AND, OR, NOT operators, Boolean algebra laws, De Morgan’s theorem, Boolean expression & logic diagram · Negative logic, alternate logic‑gate representation (bubbled gates), canonical and standard forms (minterms & maxterms), sum‑of‑minterms and product‑of‑maxterms conversion · Truth tables and Karnaugh maps for 2‑, 3‑, 4‑, 5‑ and 6‑variable functions, solving digital problems using maps, don’t‑care conditions, tabular minimisation · Sum‑of‑products and product‑of‑sums reduction, exclusive‑OR & exclusive‑NOR circuits, parity generator & checker design
Unit 2 · Short notes Combinational Circuits Design procedure for combinational logic · Half‑adder, full‑adder, half‑subtractor, full‑subtractor and code‑converter designs · Analysis of design using universal building blocks · Implementation of any logic function using only NAND gates or only NOR gates · Binary serial adder, parallel adder, serial/parallel adder, look‑ahead carry generator, BCD adder · Binary multiplier and magnitude comparator designs
Unit 3 · Short notes Sequential Logic Circuits Latches: SR latch (NAND & NOR), D latch, edge‑triggered flip‑flops, JK flip‑flop, T flip‑flop, master‑slave flip‑flop · Analysis of clocked sequential circuits: state tables, state diagrams, state reduction, state equations, state assignments · Flip‑flop excitation tables and characteristic equations · Design procedure for sequential circuits using state reduction · Applications of flip‑flops in sequential logic design
Unit 4 · Short notes Registers and Counters Asynchronous and synchronous counters, modulus counters, down counters, up/down counters, ripple‑counter propagation delay · Programmable counters, presettable counters, BCD counters, cascading counters, counter applications and decoding glitches · Ring counter, Johnson counter, rotate‑left and rotate‑right counters · Registers: buffer register, shift‑left, shift‑right, bidirectional shift registers, parallel‑in‑parallel‑out, serial‑in‑serial‑out, parallel‑in‑serial‑out, serial‑in‑parallel‑out registers
Unit 5 · Short notes Memory and Converters Random Access Memory (RAM): timing waveform, memory decoding, internal construction, coincident decoding, address multiplexing · Read‑Only Memory (ROM) implementation, types of ROMs, combinational PLDs, Programmable Logic Array (PLA), Programmable Array Logic (PAL), sequential programmable devices · Analog‑to‑Digital conversion techniques: ramp, dual‑slope, integrating, successive‑approximation, parallel, serial, converter specifications · Digital‑to‑Analog conversion techniques: binary‑weighted and R/2R DACs

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