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# Amrita Vishwa Vidyapeetham 2007 B.C.A Computer Application Electronic Devices Ciruits - Question Paper

Wednesday, 16 January 2013 06:55Web

B.C.A. Dec 2007.
Electronic Devices Ciruits
Time : 3 hours Maximum : 100 marks
ans any 5 ques..
1. (a) Convert every of these hexadecimal numbers to its decimal equivalent. (10)
(i) FF (ii) A4
(iii) 9B (iv) 3C.
(b) Convert the subsequent hexadecimal numbers to their decimal equivalents : (10)
(i) 0FFF (ii) 3FFF
(iii) 7FE4 (iv) B3D8.
2. (a) Draw a 1-of-10 binary to decimal decoder circuit. What is the Boolean formula for every Y output? (10)
(b) Draw a four input X-OR gate circuit with 2 input X-OR gates and verify its truth table. (10)
3. (a) Draw the circuit diagram of Half-subtractor and verify its truth table. (10)
(b) Output 1’s appear in the truth table for these input conditions ABCD = 0001, ABCD = 0110 and ABCD = 1110 what is the sum of products formula. (10)
4. (a) Define the subsequent : (10)
(i) Don’t care condition
(ii) Karnaugh map
(iii) Octet
(iv) Redundant group.
(b) Define the subsequent : (10)
(i) Decoder
(ii) Demultiplexer
(iii) Multiplexer
(iv) Parity generator.
5. (a) Draw the circuit diagram of D-flip-flop and discuss the timing diagram. (10)
(b) Draw the circuit diagram of JK master-slave flip flop and discuss the timing diagram. (10)
6. (a) Draw a circuit diagram of Ripple counter built with JK flip flop and discuss how the counter works. (10)
(b) Draw the circuit diagram of down counter and discuss how a down counter counts from 1111 to 0000. (10)
7. (a) Draw the circuit diagram of op-amp as inverting summing amplifier and derive the formula. (10)
(b) Draw the circuit diagram of Op-amp as adder-subtractor and arrive at the equation . (10)
8. (a) Explain any 2 op-amp non-ideal dc characteristics. (10)
(b) Explain any 2 op-amp ac characteristics. (10) 