Exercise: Code Converters And Multiplexers

Questions for: Code Converters And Multiplexers

How many inputs are required for a 1-of-10 BCD decoder?
A:
4
B:
8
C:
10
D:
1
Answer: A
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How many exclusive-NOR gates would be required for an 8-bit comparator circuit?
A:
4
B:
6
C:
8
D:
10
Answer: C
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One multiplexer can take the place of:
A:
several SSI logic gates
B:
combinational logic circuits
C:
several Ex-NOR gates
D:
several SSI logic gates or combinational logic circuits
Answer: D
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What control signals may be necessary to operate a 1-line-to-16 line decoder?
A:
flasher circuit control signal
B:
a LOW on all gate enable inputs
C:
input from a hexadecimal counter
D:
a HIGH on all gate enable circuits
Answer: B
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A principle regarding most IC decoders is that when the correct input is present, the related output will switch:
A:
active-HIGH
B:
to a high impedance
C:
to an open
D:
active-LOW
Answer: D
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