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E1223 Pages: 3

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIFTH SEMESTER B. TECH DEGREE EXAMINATION(S), MAY 2019
Course Code: EC361
Course Name: DIGITAL SYSTEM DESIGN

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any two full questions, each carries 15 marks. Marks
1 a) Design a CSSN using T-FF having a single input line ‘x’ in which binary symbols (8)

b)

b)

1 and 0 are applied. The network is to produce an output ‘1’ coincident with the

first 0 input symbol if it is preceded by exactly one or three | input symbols. All
other times the output has to remain at 0. Write the proper sample sequence before
starting the design.

Differentiate between state transition graph and ASM chart. Draw the ASM chart (7)
of a 3-bit up/down counter. How many ASM blocks are there in the ASM chart?

There are two inputs x; and x2 and single output 7. The inputs x; and x2 never (8)
change simultaneously. The output is to be 1 if x1 was the last input variable to
change value. On the hand, the output is to be 0 if x2 was the last input variable to
change value. Design a fundamental mode ASC based on the above behaviour.

Analyse the below given fundamental mode ASC (7)

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