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Multiplexers

Multiplexer

For a decoder, If the input is a N bit binary number, then the output will be one the lines of the 2^N output lines.

So, for a 2-bit binary input, there will be 2^2 output lines and only one of the output lines will be active according to the binary combination of the inputs. This type of decoder is known as 2 to 4 decoder.

A

B

Q0

Q1

Q2

Q4

0

0

1

0

0

0

0

1

0

1

0

0

1

0

0

0

1

1

1

0

0

0

1

Consider a 8:1 multiplexer that takes 8 two-bit inputs (T8 to T1), three-bit control signal (S) and has an output (Out). This Type of multiplexer is known as a 8 to 1 multiplexer. The truth table is given below:

S2

S1

S0

OUT

0

0

0

T1

0

0

1

T2

0

1

0

T3

0

1

1

T4

1

0

0

T5

1

0

1

T6

1

1

0

T7

1

1

1

T8

This is a circuit design for 4:1 Multiplexer

Coursework for CPE111 course.

Fork the project to test the circuit.

Coursework for CPE111.

Fork the project to test the circuit.

Multiplexer made from NOT and 2-Input OR gates

Instructions

Set both buttons to off (RED). Now reset the sequencer and turn on button 1 and 2 (set to GREEN). 

Button 1 controls the data fed to the displays.

OFF = Clear all displays ON = Programmed message

Button 2 controls the clock.

To change the message, dump the core or reset the EEPROM and rewrite the suitable data for the 16-Segment Displays. If the new message contains lesser or more letters/numbers to show, make suitable changes to the Sequencer and change the number of displays used.

Abdul Muthalib

Roll no: 2

Reg no: 20919002

4-1 Multiplexer

4-input

2-data selector

1-data channel (output)

Implementation of a MUX using Basic Gates

Classification of Combinational circuit

Multiplexer - It is a combinational digital circuit that forward data from one of the 2ⁿ input lines to a single output line on the base of n selection lines.

D.L.F experiment 03(d) 

Minesweeper: The game

Class lab project

4:1 MUX