August 1997
LD201: LOGIC DESIGN

QUESTION 1 (Compulsory)

Total Marks: 20 Marks

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SUGGESTED SOLUTIONS
for Question 1

1. (a) Express the decimal number -0.187510 in the floating point format M(6) E(4), with both mantissa and exponent in 2's complement. [4]
(b) Perform the following addition :
1000 1001BCD + 0111 11012 [3]
Convert the answer into hexadecimal representation. [1]
(c) Derive a simplified POS (product of sums) expression from the following K map: [4]
(d) Give the truth table for the block diagram shown below: [4]
(e) Consider the circuit shown below [4]
and complete the waveform for output Q, as input A varies as shown over four clock cycles: