Test: Multiplexers
14 Questions MCQ Test GATE Computer Science Engineering(CSE) 2023 Mock Test Series | Test: Multiplexers
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Consider the following Boolean function of four variables:
The function is
The K-map would be
So, the minimized expression would
be x'z + xz'.
So, option B.
Consider the following Boolean function of four variables
The function is
The simplified SOP (Sum of Product) from the Boolean expression
1s
Consider the 4-to-1 multiplexer with two select lines S1 and S0 given below
The minimal sum-of-products form of the Boolean expression for the output F of the multiplexer is
S0 and S1 are used to select the input given to be given as output.
Consider the following Boolean expression for F:
The minimal sum of products form of F is
Hence, option A is correct.
Consider the following minterm expression F for :
The minterms 2, 7, 8 and 13 are 'do not care' terms. The minimal sum-of-products form for F is
While putting the terms to K-map the 3rd and 4th columns are swapped so do 3rd and 4th rows. So, term 2 is going to (0,3) column instead of (0,2), 8 is going to (3,0) instead of (2,0) etc..
Solving this k-map gives B) as the answer.
Consider the two cascade 2 to 1 multiplexers as shown in the figure .
The minimal sum of products form of the output X is
The output F of the below multiplexer circuit can be represented by
for n bit data select input
It is possible for an enable or strobe input to undergo an expansion of two or more MUX ICs to the digital multiplexer with the proficiency of large number of
It is possible for an enable or strobe input to undergo an expansion of two or more MUX ICs to the digital multiplexer with the proficiency of large number of inputs.
Consider a multiplexer with X and Y as data inputs and Z the as control input. Z = 0 selects input X, and Z = 1 selects input Y. What are the connections required to realize the 2-variable Boolean function F = T + R, without using any additional hardware?
Z'X + ZY..
Put Z = T, X = R, Y = 1 in Z'X + ZY..
= T'R + 1*T
= (T+T') (T+R)
= T + R
The circuit shown below implements a 2-input NOR gate using two 2 4 MUX (control signal 1 selects the upper input).
What are the values of signals x,y and z?
Suppose only one multiplexer and one inverter are allowed to be used to implement any Boolean function of variables.
What is the minimum size of the multiplexer needed?
2n - 1
We will map variables to select lines and variable to input line
The following circuit implements a two-input AND gate using two 2-1 multiplexers.
What are the values of X1,X2,X3?
F = (bX1' + aX1)X3 + X2X3'
Put X1 = b, X2 = 0, X3 = a to get F = ab.
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