Digital Electronics - Code Converters and Multiplexers

Exercise :: Code Converters and Multiplexers - General Questions

36. 

How can the active condition (HIGH or LOW) or the decoder output be determined from the logic symbol?

A. A bubble indicates active-HIGH.
B. A bubble indicates active-LOW.
C. A square indicates active-HIGH.
D. A square indicates active-LOW.

Answer: Option B

Explanation:

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

37. 

If two inputs are active on a priority encoder, which will be coded on the output?

A. the higher value
B. the lower value
C. neither of the inputs
D. both of the inputs

Answer: Option A

Explanation:

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38. 

A circuit that responds to a specific set of signals to produce a related digital signal output is called a(n):

A. BCD matrix
B. display driver
C. encoder
D. decoder

Answer: Option C

Explanation:

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39. 

How many 74184 BCD-to-binary converters would be required to convert two complete BCD digits to a binary number?

A. 8
B. 4
C. 2
D. 1

Answer: Option C

Explanation:

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40. 

How many select lines would be required for an 8-line-to-1-line multiplexer?

A. 2
B. 3
C. 4
D. 8

Answer: Option B

Explanation:

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