Electronics and Communication Engineering - Digital Electronics

11. 

Which of the following is the least important consideration while selecting a logic technology?

A. Power dissipation
B. Noise immunity
C. Number of pins
D. Cost

Answer: Option C

Explanation:

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12. 

The logic circuit of the given figure realizes the function

A. (A + B + C)(D)(E)
B. (A + B + C) (D)(E)
C. (A + B = C) (D)(E)
D. (A + B + C)(D)(E)

Answer: Option A

Explanation:

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13. 

Is Schottky TTL, Schottky diode is used primary to

A. prevent saturation of the transistor
B. saturate the transistor
C. act as a switch
D. act as a controlling switch

Answer: Option A

Explanation:

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14. 

What is the maximum output voltage from the 741 op-amp?

A. Zero
B. Approximately 1 V
C. Approximately 3 V
D. Approximately 5 V

Answer: Option D

Explanation:

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15. 

A full adder is to be implemented using half adders and OR gates. A 4 bit parallel adder without any initial carry requires

A. 8 half adders and 4 OR gates
B. 8 half adders and 3 OR gates
C. 7 half adders and 3 OR gates
D. 7 half adders and 4 OR gates

Answer: Option C

Explanation:

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