Electronics and Communication Engineering - Digital Electronics

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:

No answer description available for this question. Let us discuss.

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

A. RTL
B. DTL
C. TTL
D. ECL

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:

No answer description available for this question. Let us discuss.

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:

No answer description available for this question. Let us discuss.