multiplexer & de multiplexer
TRANSCRIPT
“MULTIPLEXER & DE-MULTIPLEXER”
PREPARED BY :
DISHANT PATEL 140123109009
VISHAL GOHEL 140123109003
KULDEEP THAKKAR 130120109058
GUIDED BY : Prof. shweta khakhakhar
Multiplexer and De-Multiplexer
A multiplexer is a circuit that accept many input but
give only one output.
A de-multiplexer function exactly in the reverse of a
multiplexer, that is a de-multiplexer accepts only one
input and gives many outputs.
Generally multiplexer and de-multiplexer are used
together.
Multiplexer
Multiplexer means many into one. A multiplexer
is a circuit used to select and route any one of
the several input signals to a signal output.
An simple example of an non electronic circuit of
a multiplexer is a single pole multi position
switch.
Uses of Multiplexers
Multi-position switches arewidely used in manyelectronics circuits.
However circuits that operateat high speed require themultiplexer to be automaticallyselected.
A mechanical switch cannotperform this task satisfactorily.Therefore, multiplexer used toperform high speed switchingare constructed of electroniccomponents.
Multiplexer
Types of Multiplexer
• Multiplexer handle two type of data that is analogand digital. For analog application, multiplexerare built of relays and transistor switches. Fordigital application, they are built from standardlogic gates.
• The multiplexer used for digital applications, alsocalled digital multiplexer, is a circuit with manyinput but only one output. By applying controlsignals, we can steer any input to the output. Fewtypes of multiplexer are 2-to-1, 4-to-1, 8-to-1, 16-to-1 multiplexer.
4-to-1 Multiplexer
The 4-to-1 multiplexer has 4input bit, 2 control bits, and 1output bit. The four input bitsare I0,I1,I2 and I3.
only one of this is transmittedto the output y.
The output depends on thevalue of S0 and S1 which is thecontrol input.
The control input determineswhich of the input data bit istransmitted to the output. 4-to-1 multiplexer
4-to-1 Multiplexer
S1 S0 F
0 0 I0
0 1 I1
1 0 I2
1 1 I3
Applications of Multiplexer
Multiplexer are used in various fields where
multiple data need to be transmitted using a
single line. Following are some of the
applications of multiplexers
Communication system
Telephone network
Computer memory
Transmission from the computer system of a
satellite
De-multiplexer
De-multiplexer means oneto many. A de-multiplexer is acircuit with one input andmany output.
By applying control signal,we can steer any input to theoutput. Few types of de-multiplexer are 1-to 2, 1-to-4,1-to-8 and 1-to 16 de-multiplexer. 1-to-4
De- multiplexer
1-to-4 De-MultiplexerA B Y0 Y1 Y2 Y3
0 0 1 0 0 0
0 1 0 1 0 0
1 0 0 0 1 0
1 1 0 0 0 1
Applications of De-Multiplexer
De-multiplexer is used to connect a single
source to multiple destinations. The main
application area of de-multiplexer is
communication system where multiplexer are
used.
Communication System
ALU (Arithmetic Logic Unit)
Serial to parallel converter
Comparison of Multiplexer and De-
MultiplexerSr. no. Parameter Multiplexer De-multiplexer
1 Type of logic circuit Combinational Combinational
2 No. of data inputs n 1
3 No. of select inputs m m
4 No. of data output 1 n
5 Relation between input/output
lines & select lines
n=2m n=2m
6 Operation principle Many to 1 or as data
selector
1 to many or data
distributor
7 Application •As a universal logic
cikt we can
implement any
combinational ckt
using a MUX.
We can implement
some combinational
ckt
Refrences
• J.S.Katre