UNIT 5 ADC

What is a multiplexer?

• It is a type of decoder which decodes several inputs and gives one output

• A multiplexer is a device which converts many signals into one

• It takes one input and results into many output

• It is a type of encoder which decodes several inputs and gives one output

Multiplexers are also called__________

• Decoders

• encoders

• data selectors

• comparators

If the number of  selected input lines is equal to 2,  then it requires _____ selector lines.

• 2

• 1

• n

•  2n

4 to 1 MUX would have

• 2 inputs

• 3 inputs

• 4 inputs

• 5 inputs

In a multiplexer the output depends on its

• data inputs

• select inputs

• select outputs

• enable pins

The four inputs MUX would have

• 1 select line

• 2 select line

• 4 select line

• 3 select line

Demultiplexers are also called

• Decoders

• encoders

• data distributors

• comparators

In 1-to-4 demultiplexer ,how many select lines are required?

• 2

• 3

• 4

• 5

The word demultiplexer means

• one into many

• many to one

• data selectors

• none of the above

Which of the following circuits can be used as parallel to serial converter

• Multiplexer

• Demultiplexer

• Decoder

• digital counter