Osmania University (OU) 2011 B.Sc Electronics -III model - Question Paper

BHARAT DEGREE COLLEGE FOR WOMEN
Pre-Final Examinations, January-2012
B.Sc-Electronics-Paper-III
Digital Electronics and Microprocessors.

Time:3 Hours Max.marks : 100

ans any 5 of the following: (5*4=20)

1. W.A.P. for multiplication of 2 numbers using counter method.
2. State and prove De-Morgans Theorem.
3. Explain the RTL Logic family.
4. Explain Successive approximation method of converter.
5. List out and discuss different addressing modes.
6. Explain Instruction, Machine, Fetch and Execute cycles.
7. Explain Decade Counter (7490).
8. Explain 7 Segment LED.

ans All questions: (4*20=80)

1. a) discuss all Boolean Identities. (14 M)
b) Convert the subsequent Hexa-decimals to Decimals. (06M)
i) 1A6 ii) 37FD iii) BABA

[OR]
c) discuss construction and working of DTL and RTL families (12M)
d) Solve F=?m(1,4,5,12,13,8,9,2,6,14). (08M)


2 a) Construct and discuss Master-Slave JK-Flip flop. (14M)
b) Explain Full-Adder circuit. (06M)

[OR]
c) define Shift register and its mode of functionality. (15M)
d) discuss Multiplexer circuit. (05M)


3 a) define Architecture of 8085/86 Microprocessor. (20M)

[OR]
b) discuss Instruction set of 8085/86 Microprocessor. (20M)


4. a) discuss the interfacing of programmable peripheral interface (8255). (20M)

[OR]
b) discuss Keyboard interfacing (8279) with microcontroller. (12M)
c) discuss Organisation of memory. (08M)

***ALL THE BEST***

Earning:   Approval pending.