Electronics and Communication Engineering - Digital Electronics

31. 

In a flip-flop with a NAND latch, a low R and a low S produces

A. active condition
B. inactive condition
C. race condition
D. dead condition

Answer: Option C

Explanation:

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32. 

ECL can be used to high frequencies in the order of

A. 500 kHz
B. 1 MHz
C. 100 MHz
D. 500 MHz

Answer: Option D

Explanation:

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33. 

The output Y of the circuit shown in the figure is

A. (A + B) C + DE
B. AB + C(D + E)
C. (A + B) C + D + E
D. (AB + C) . DE

Answer: Option A

Explanation:

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34. 

Status register in the 8156 is read with

A. IN 20 H
B. OUT 20 H
C. either (a) or (b)
D. none of the above

Answer: Option A

Explanation:

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35. 

Binary 1111 when subtracted from binary 11111 is

A. 101110
B. 10110
C. 10000
D. 100010

Answer: Option A

Explanation:

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