B4C082S Pages: 2

PART C
Answer any two questions; each question carries 10 marks

. Design a MOD-12 asynchronous counter (ripple counter) using JK flip flop. Explain

the working with truth table and timing diagram. (10)

. 8) Draw the block diagram of a 4 bit ALU, and explain it, showing its inputs and

outputs. (5)
b) Design a BCD to decimal decoder. (5)
. What are fast adders? Design a 4 bit, carry look ahead adder, showing the logical
diagram. (10)
PART 0

Answer any two questions; each question carries 10 marks

. Design a counter to obtain the count sequence 2, 4, 3, 6, 2, 4, 3, 6... using JK flip

flop. (10)
. a) Compare the Moore and Mealy state machine models. (5)
b) Compare PAL and PLA. (5)
. With a neat block schematic, describe the working of a successive approximation
ADC and illustrate it with a suitable example. (10)
ie a ‏بد باد‎

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