题目内容

Assume the clock for a 4-bit binary counter is 80 kHz. The output frequency of the fourth stage (Q3) is ().

A. 5 kHz
B. 10 kHz
C. 20 kHz
D. 320 kHz

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The 74138 decoder can also be used as ()

A. an encoder
B. a DEMUX
C. a MUX
D. none of the above

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The device used to convert a binary number to a 7-segment display format is the ()

A. multiplexer
B. encoder
C. decoder
D. register

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If you expand two 4-bit comparators to accept two 8-bit numbers, the output of the least significant comparator is ()

A. equal to the final output
B. connected to the cascading inputs of the most significant comparator
C. connected to the output of the most significant comparator
D. not used

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Adjacent cells on a Karnaugh map differ from each other by ()

A. one variable
B. two variables
C. three variables
D. None of above

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Assume the clock for a 4-bit binary counter is 80 kHz. The output frequency of the fourth stage (Q3) is ().

A. 5 kHz B. 10 kHz C. 20 kHz D. 320 kHz

The 74138 decoder can also be used as ()

The device used to convert a binary number to a 7-segment display format is the ()

If you expand two 4-bit comparators to accept two 8-bit numbers, the output of the least significant comparator is ()

Adjacent cells on a Karnaugh map differ from each other by ()

A. 5 kHz
B. 10 kHz
C. 20 kHz
D. 320 kHz