DISTANCE EDUCATION
B.C.A. DEGREE EXAMINATION, MAY 2018.
ELECTRONIC DEVICES AND DIGITAL CIRCUITS
(2003 Onwards)
Time Three hours Maximum 100 marks
Answer any FIVE questions.
All questions carry equal marks.
x 20 100)
1. Explain XOR operation. Give truth tables for 2
inputs XOR gate.
Discuss how the transistor acts as a switch.
3. Explain the half-adder and full adder functions with
truth table and circuit diagram.
4. Discuss the working principle of synchronous counter
with its block diagram. List out its advantages.
Sub. Code
11
DE-3574
2
Sp 2
5. With a neat diagram, explain the working function
of SCR.
Explain the working function of JFET with suitable
diagram.
6. Describe the operations of R-S flip flop with logic
diagram and truth table.
Explain the applications of operational amplifier.
7. State and prove the basic axioms of Boolean algebra with
the help of logic circuits.
8. Explain the working of Asynchronous counter.
Discuss in detail about shift registers.