Electronics and Communication Engineering - Digital Electronics

6. 

7483 is a TTL binary adder. It can add

A. two 4-bit binary numbers
B. four 6-bit binary numbers
C. four 8-bit binary numbers
D. any number of 4-bit numbers

Answer: Option A

Explanation:

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7. 

A 12 bit ADC is operating with 1 μs clock period. Total conversion time is 14 μs. ADC is

A. flash type
B. counting type
C. integrating type
D. successive approximation type

Answer: Option C

Explanation:

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8. 

An 8156 has A15 connected to its CE input. A14 to A8 are unconnected, and AD7 to AC0 are connected ignoring shadows, what are the RAM locations?

A. (4000)H - (40FF)H
B. (8000)H - (80FF)H
C. (8000)H - (40FF)H
D. Any of the above

Answer: Option B

Explanation:

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9. 

D/A converters are generally

A. weighted resistor network
B. binary ladder network
C. either (a) or (b)
D. neither (a) nor (b)

Answer: Option B

Explanation:

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10. 

Is the interrupt-enable flag?

A. Low
B. High
C. Never
D. None

Answer: Option B

Explanation:

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