Electronics and Communication Engineering - Digital Electronics

26. 

If tp is the pulse width, Δt is the propagation delay, T is period of pulse train then the following condition can avoid the race around condition

A. tp = Δt = T
B. 2tp > Δt > T
C. tp < Δt < T
D. tp < Δt < T

Answer: Option C

Explanation:

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27. 

In a Karnaugh map for an expression having 'don't care terms' the don't cares can be treated as

A. 0
B. 1
C. 1 or 0
D. none of the above

Answer: Option C

Explanation:

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28. 

Which of the following pairs of octal and binary numbers are not equal?

A. 111 110112 = 7678
B. 1101101012 = 6658
C. 110102 = 38
D. 10101.112 = 25.68

Answer: Option C

Explanation:

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29. 

With a JK master-slave flip-flop the master is clocked when the clock is __________ , and the slave is triggered when the clock is __________ .

A. low, low
B. high, low
C. low, high
D. high, high

Answer: Option B

Explanation:

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30. 

The communicating capacitor reduces turn on time because

A. it acts as an open circuit
B. it allows maximum base circuit to flow
C. it aids in removing the excess carrier from the base region
D. none of these

Answer: Option B

Explanation:

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