Morris Mano [COA]

Question

Design an arithmetic circuit with one selection variable S and two n-bit data inputs A and B. The circuit generates the following four arithmetic operations in conjunction with the input carry Cin. Draw the logic diagram for the first two stages.

S	Cin = 0	Cin = 1
0	D= A+B (add)	D= A+1 (increment)
1	D= A-1 (decrement)	D= A+B′+1 (subtract)

Answer 1

Solution:- there are also simple diagram. Comment if you want. 

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