APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY Previous Years Question Paper & Answer

Course : B.Tech

Semester : SEMESTER 3

Year : 2020

Term : DECEMBER

Scheme : 2019 Full Time

Course Code : ECT 203

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0800ECT203122004

(a) Reduce the Boolean expression F=[]TM(1,2,3,4,10,11,15) using K-Map
(b) Write Verilog code for implementing the above function
Module 3
(a) Design a BCD adder circuit.
(b) Write Verilog code for full subtractor circuit.
(a) Design a 3-bit magnitude comparator.
(0) Implement the logic function F(A,B,C,D)= © m(1,3,4,11,12,13,14,15) using
8:1 MUX
Module 4
(a) Explain the operation of a 4-bit Johnson counter with truth table and
waveforms.
(b) Design a mod-10 asynchronous counter using T flip-flop.
Design a mod -16 synchronous counter using JK flip-flop.
Module 5
(a) Explain the working of a transistor level TTL NAND gate.
(b) Draw and explain the working of a transistor level CMOS inverter.
(a) Explain the working of a transistor level CMOS NOR gate.
(b) Compare TTL & CMOS logic families in terms of fan-in, fan-out, supply

voltage, power supply and propagation delay and power dissipation.

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