Electronics and Communication Engineering - Digital Electronics

21. 

Which multivibrator can be used as a clock timer?

A. Astable multivibrator
B. Bistable multivibrator
C. Any of the above
D. None of the above

Answer: Option A

Explanation:

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

22. 

T-flip-flop is commonly used as

A. a delay switch
B. a digital counter only
C. a digital counter and frequency divider
D. any of the above

Answer: Option C

Explanation:

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23. 

In the NMOS inverter

A. the driver and achieve load are enhancement type
B. the driver is enhancement type and load depletion type
C. both driver and load are depletion type
D. the driver and load are depletion type

Answer: Option B

Explanation:

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24. 

For the switch circuit, taking open as 0 and closed as 1, the expression for the circuit is Y. Y is given by

A. A + (B + C) D
B. A + BC + D
C. A(BC + D)
D. none of these

Answer: Option C

Explanation:

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25. 

Assuming accumulator contain A 64 and the carry is set (1).What will register A and (CY) contain after RAR?

A. 4 DH, 0
B. D 3H, 0
C. 4 DH, 1
D. 53 H, 0

Answer: Option B

Explanation:

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