DISTANCE EDUCATION
B.C.A. DEGREE EXAMINATION, DECEMBER 2017.
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. Discuss the use of complements to represent
negative numbers in the Decimal number system.
Add (1011)2 with (1101)2
Subtract 29 10 using complement
Convert into signed binary number
Subtract (0110)2 from (1011)2.
2. Describe how the NAND and NOR gates can act as
universal building blocks.
3. Design the circuit diagram of a full subtractor and
explain.
Explain Quine-McKluskey tabulation method for
simplification of digital circuit.
4. Explain about J-K flip flop with truth table.
Elucidate the function of ring counter.
Sub. Code
11
DE-2474
2
Sp 1
5. Discuss in detail about the working principle of P-N
Diode and its characteristics.
6. What is Gray code? Write its importance. Give
examples.
State and prove the De Morgans' theorems.
7. Draw the three variable Minterm Karnaugh map
and explain it.
Explain the function of controlled shift register.
8. Discuss in detail the working function of photo
diode.
Describe the process of achieving breakdown in
Zener diode.