Gate2009

Question

What is minimum no of 2 to 1 MUX required to generate 2 input AND  gate and 2 input ExOR gate

A) 1& 2

B)1&3

C)1&1

D)2&2

Comments

AND Gate F = AB

A	B	F
0	0	0
0	1	0
1	0	0
1	1	1

Apply input B to selection line and apply data input line I₁ = A and I₀ = 0

1 MUX required

XOR Gate F = A'B + AB'

A	B	F
0	0	0
0	1	1
1	0	1
1	1	1

Apply  input  B to selection line and apply  I₁ = A'  and I₀ = A

1 MUX required

Option C

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ans is  A .
due to direct complement (input) is not given

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answer will be 1 mux for AND and 2 mux for exor.

Answer 1

For AND, we need 1 2X1 MUX

For XOR, we need 2 2X1 MUX ( we need 1 2X1 MUX  for complement of B )