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Morris Mano Edition 3 Exercise 5 Question 11 (Page No. 198)
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Construct a 4-digit BCD adder-subtractor using 4 BCD adders. Use the Block diagram for each component, showing only inputs and outputs.
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Morris Mano Edition 3 Exercise 5 Question 9 (Page No. 198)
How many Unused Combinations are there in BCD adder?
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Morris Mano Edition 3 Exercise 5 Question 8 (Page No. 198)
Derive the two-level Boolean expression for the output carry $C _5$ shown in the look-ahead carry generator of the figure
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Morris Mano Edition 3 Exercise 5 Question 6 (Page No. 198)
Assume that the EXCLUSIVE-OR gate has a propagation delay of 20ns and that the AND and OR gates have a Propagation delay of 10ns. What is the total Propagation delay time in the four-bit adder of the figure given below?
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Morris Mano Edition 3 Exercise 5 Question 6 (Page No. 198)
(a) Redefine the carry propagate and carry generate as follows: $P _i = A _i + B _ i$ $G _i = A _iB _i$ ... circuit for this IC. [Hint: use the equation substitution method and AND-OR-INVERT funtion given in part (a) for $C _{i+1}$
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