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B3C037S Pages: 2
PART D
Answer any two questions. Each carries 9 marks.
a) Describe the design and function table for a 4 to 1 line multiplexer. (5)
b) Draw the circuit and explain the working of Master Slave JK flip flop. (4)
Design a code converter for converting BCD to Excess 3 code. (Circuit not required).
. Explain how clocked sequential circuits can be designed with state equations, using an
example.

PART E
Answer any four questions. Each carries 10 marks.

. Design and implement a 4 bit binary synchronous up counter.
. Design a Johnson counter and explain its working.
. Draw and explain the flow chart for addition and subtraction of two binary numbers in

sign magnitude form.

. Describe the working of Programmable Logic Array (PLA) with a block diagram and a
simple example.

. a) Write notes on Read Only Memory. (5)
b) Explain how shift registers can be used for serial transfer. (5)

. a) Give the logic circuit for a BCD ripple counter. (5)
b) Write notes on Random Access Memory. (5)

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