Rajiv Gandhi Proudyogiki Vishwavidyalaya 2010 B.E Computer Science and Engineering cs-304 digital electronics s - Question Paper

R.G.P.V. Bhopal (MP)
B.E. (4th Semester) EXAM, JUNE-2010
DIGITAL ELECTRONICS [ EC-403(N) ]
Time:3 Hrs Max Marks:100 Min Marks:35
Note:- Attempt any 5 ques. .All ques. carry equal marks.

UNIT-I
Q.1.(a) define the weighted and non-weighted codes? 10
(b) Do the subsequent as directed: 10
(i) (235)7 = (?) eight = (?) BCD
(ii) (235) BCD + (432) BCD in Ex-3

OR

Q.2.(a) discuss the fault detecting and Error-correcting codes with the suitable example? 10
(b).Minimize the subsequent expression using K-Map and realize with NAND gates? 10
F(A,B,C,D)=? m(2,3,6,7,8,9,10,11,12,13,14,15)

UNIT-II

Q.3.(a)Explain the working of Modulo-5 counter with state diagram and truth table? 10
(b) Draw and discuss the BCD adder circuits? 10

OR
Q.4.(a)Convert JK Flip-Flop to SR and SR to JK Flip-Flop? 10
(b)Explain the Operation of look ahead carry generator? 10

UNIT-III

Q.5.(a)Write short notes on Astable multivibrator using transistor? 10
(b)Draw the circuit of TTL with totem-pole output and verify that it performs NAND operation?10

OR

Q.6.(a)Write short notes on bistable multivibrator using transistors? 10
(b)Write short notes on MOS logic family?also discuss PMOS,NMOS,and CMOS? 10

UNIT-IV

Q.7(a).Expalin the working of Master-slave JK Flip-Flop? 10
(b)Write short notes on semiconductor memories? 10
OR

Q.8(a)Write short notes on(any two) every 5
(i). PLAs
(ii) PALs
(iii) EEPROM
(iv) Multipxer Tree
(b)Design the circuit using 4:1 multiplexer? 10
F(A,B,C,D)= ?m (0,2,4.,56,8,,9,11,12,13,14)

UNIT-V

Q.9.(a).Write short notes on edged triggered SR-flip flop ? 10
(b) Differantiate ranging from latch and flip-flop? 10
OR

Q.10 (a).Write short notes on? 10
(i) Fan-In-Fan-Out
(ii) Noise Margin
(iii) Speed of Operation
(iv) Power dissipation
(b) discuss the working of CMOS NAND and CMOS-NOR ? 10

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Earning:   Approval pending.