81. Consider the multiplexer based logic circuit shown in the figure
Which one of the following Boolean functions is realized by the circuit?
Which one of the following Boolean functions is realized by the circuit?
82. Simplify the Boolean function F(w, x, y, z) = Σ(1, 3, 7, 11, 15) And the don't care conditions: d(w, x, y, z) = Σ(0, 2, 5)
83. A Boolean function f of two variables x and y is defined as follows:
f(0, 0) = f(0, 1) = f(1, 1) = 1; f(1, 0) = 0
Assuming complements of x and y are not available, a minimum cost solution for realizing f using only 2-input NOR gates and 2-input OR gates (each having unit cost) would have a total cost of
f(0, 0) = f(0, 1) = f(1, 1) = 1; f(1, 0) = 0
Assuming complements of x and y are not available, a minimum cost solution for realizing f using only 2-input NOR gates and 2-input OR gates (each having unit cost) would have a total cost of
84. Two's complement of the binary number 10010100 is
85. What is dual of A + [B + (AC)] + D
86. A 4 : 1 multiplexer requires . . . . . . . . data selection line.
87. In the 8421 BCD code the decimal number 125 is written as
88. In figure below, U1 is a 4-bit binary synchronous counter with synchronous clear. Q0 is the LSB and Q3 is the MSB of the output.
The circuit shown in figure represents a:
The circuit shown in figure represents a:
89. D flip-flop can be made from J-K flip-flop by making:
90. The decimal equivalent of binary 1101.11 is
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