Digital electronics miscellaneous
- Which of the following statement is not correct?
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Given X + XY = X
But X + XU = X + U
Hence option (A) is not correct.
X ( X + Y) = XX + XY = XY → correct
X + XY = X (1 + Y) = X → correct
ZX + ZXY = Z [X + Y] = ZX + ZY → correctCorrect Option: A
Given X + XY = X
But X + XU = X + U
Hence option (A) is not correct.
X ( X + Y) = XX + XY = XY → correct
X + XY = X (1 + Y) = X → correct
ZX + ZXY = Z [X + Y] = ZX + ZY → correct
- Mark the incorrect statement—
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NA
Correct Option: A
NA
- The characteristic equation of an R-S flip-flop with activeHIGH inputs is given by—
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The characteristic equation of an RS flip-flop with active-HIGH inputs is given by
Qn + 1 = S + R′QnCorrect Option: C
The characteristic equation of an RS flip-flop with active-HIGH inputs is given by
Qn + 1 = S + R′Qn
- Consider a multiplexer with X and Y as data inputs and Z 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?
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Given that multiplexer input X and Y Z as a control line
By the defination of 2 × 1 Mux, we get
f = ZX + ZY.... (i)
and required output
f = T + R.... (ii)
on comparing equations (i) and (ii) we get
R = X, Y = 1 and T = Z
Correct Option: A
Given that multiplexer input X and Y Z as a control line
By the defination of 2 × 1 Mux, we get
f = ZX + ZY.... (i)
and required output
f = T + R.... (ii)
on comparing equations (i) and (ii) we get
R = X, Y = 1 and T = Z
- For the circuit shown below the counter state (Q1 Q0) follow the sequence—
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NA
Correct Option: B
NA
