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13. a. Differentiate Multiplexer and De-multiplexer, With simple examples, explain how

they are implemented. (5)
b. Differentiate SR and JK flip-flops, (5)
14. With the help of neat circuit and timing diagram, explain the functioning of a BCD
decade asynchronous counter (MOD10) (10)
PART D

Answer any two questions, each carries 10 marks.

15. Design a counter for the following irregular binary count sequence using 1-6 flip

flops

001501031015 111 > 001(recycles) (10)
16. a. Draw the truth-table and logic circuit diagram of a Ring counter (5)
b. What is the basic difference between PAL (programmable Array Logic) and PLA
(Programmable Logic Array). ۱ (5)
17. Explain the working of ⋅
(i) R-2R Ladder type DAC
(5+$)

(ii) Successive approximation ADC

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