Exercise: Digital Electronics

Questions for: Digital Electronics

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: B
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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: C
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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: C
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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: A
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The advantage of using dual slope ADC in digital voltmeter is that
A:
its conversion time is small
B:
its accuracy is high
C:
its output is in BCD
D:
it does not require a comparator
Answer: B
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