Electronics and Communication Engineering - Digital Electronics
Exercise :: Digital Electronics - Section 14
| 26. |
A master slave flip-flop has the characteristics that |
| A. |
change in the I/P immediately reflected in the O/P | | B. |
change in the O/P occurs when the state of the master is affected | | C. |
change in the output occurs when the state of the slave is affected | | D. |
both the master and the slave states are affected at the same time |
Answer: Option C
Explanation:
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| 27. |
Which of the following flip-flops is used as latch? |
| A. |
JK flip-flop | | B. |
D flip-flop | | C. |
RS flip-flop | | D. |
T flip-flop |
Answer: Option C
Explanation:
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| 28. |
Least expensive logic |
Answer: Option A
Explanation:
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| 29. |
The circuit show in the figure has 4 boxes each described by inputs P, Q, R and outputs y, z with
Y = P ⊕ Q ⊕ R, Z = RQ + PR + QP The circuit act as a
 |
| A. |
4 bit adder giving P + Q | | B. |
4 bit subtractor P - Q | | C. |
4 bit subtractor Q - P | | D. |
4 bit adder P + Q + R |
Answer: Option B
Explanation:
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| 30. |
Logic pulser |
| A. |
generates short duration pulses | | B. |
generates long duration pulses | | C. |
generates sinusoidal voltage | | D. |
generates ideal pulses |
Answer: Option A
Explanation:
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