DIGITAL CIRCUITS (CSE403)
UNIT 1-Number System:
Number Systems and Codes : Decimal, Binary, Octal, Hexadecimal number system and conversion from one number system to another, Arithmetic operations using these number systems, Representation of negative number in the different number systems, Complements and complement subtraction, Different codes (8421, Ex~3, 2421, Gray, Alphanumeric, BCD, Seven segment codes etc) and code conversions
UNIT 2-Boolean Algebra and Logic Gates:
Postulates and different theorems. SOP and POS forms of expression and their conversion.Simplification : using Boolean theorems and k-map (up to 4 variables). Basic logic gates - their symbols, truth table and logic ' expression for the output simple circuit realization using the logic gates. Realization of any expression either using all NAND or NOR gates
UNIT 3-Combinational Logic Circuits:
Arithmetic circuit (Adder/ Subtractor), Multiplexers and their uses, Decoder/demultiplexers and their uses, code converter, Encoder, parity generator/checkers
UNIT 4-Families of Logic Circuit :
TTL and CMOS family, open collector and tri-state logic gates.
UNIT 5-Storage Devices & Sequential Circuits :
Latches and Flip-flops, Timing diagrams of latches and flip flops, conversion of one flipflop to another, Counters - Binary ripple counters, Asynchronous module counters, UP/Down counter, Synchronous counters (binary, different modulo and UP/Down), Timing diagram of all types of counters. Brief introduction to a few commercially available counter ICs (asynchronous and synchronous). Shift-registers-Different types of shift registers and their functional details, A few applications of shift-registers.Memory -Memory types and terminology, Memory organization, Semiconductor memory, reading and writing, RAM, ROM, PROM cells and circuits, EPROM (Programming and erasing), Dynamic RAM, Memory expansion, PLA.
UNIT6-Data Converters :
Digital-to-Analog Conversion - Weighted resistor, R-2R ladder, DAC performance and their characteristics.Analog-to-Digital Conversion - Counter type ADC, dual slope type, successive approximation type, tracking type and flash type, ADC performance and their characteristics.
UNIT 7-Display and Display Drives:
Introduction to LED, LCD, 7-segment displays, Bar graph display and Dot matrix displays. Decoder drivers for 7-segment display, Bar graph display and LCD. Multiplexing of display.
PRACTICAL :
1.Verification of truth tables of different basic logic gates.
2.Realisation of logic expressions using different basic logic gates.
3.Realisation of logic expressions using either all NAND or all NOR gates.
4.Adder circuits (Half, Full-adder) design.
5.Design of a multiplexer using logic gates (4 to 1 Multiplexer)
6.Use of commercially available multiplexer ICs to realise two logic functions.
7.Design of a decoder using logic gates (2 to 4 decoder)
8.Use of commercially available decoder ICs to realise two logic functions.
9.Design of RS, JK, D latches using logic gates.
10.Design of master/slave JK flip-flop.
11.To study the functional behaviour of some commercially available flip-flop ICs (JK and D)
12.Counter design (modulo 6 and 10 asynchronous and synchronous counters) using flip-flop and to display the counts on 7-segment display units.
13.To study the performance of some commercially available counter ICs (asynchronous and synchronous), cascading of counter ICs, Different modulo (MOD-6 and MOD-10) counter design using counter ICs.
14.To design a shift register using flip-flops and to study its behaviour.
15.To study the different functional features of shift register ICs.
REFERENCE BOOKS :
Digital Systems – by Ronald J. Tocci, PHI
Digital Design – by Mano, PHI
Digital Logic & Comp. Design – by Mano, PHI
LIST OF EQUIPMENT
- Digital Trainer Kit
- Powered Project board containing
- Solderless breadboard with
- Power supply
- Power lead and connector plate
- Logic Trainer lab with
- DC power supply (+5V, 1A, 5V at 500 mA +/- 15V at 500 mA)
- Logic Switches (slide)
- Pulse generator 1Hz, 10Hz & 100 Hz sq. wave
- Logic gates (30 built in logic gates comprising dual input for each of AND, OR, NAND, NOR, XOR & NOT gates)
- Power supply
- Flip-flop trainer kit
- Counter trainer kit