This document discusses encoders and multiplexers. It begins with defining an encoder as a combinational circuit that performs the reverse operation of a decoder, taking in 2n inputs and outputting n bits. An example of a simple 2n to n binary encoder is provided. The key differences between encoders and decoders are outlined. Circuit diagrams and truth tables are shown for an octal-to-binary encoder. The document then defines a multiplexer as a circuit that selects one of several input signals to route to a single output. An example of implementing a Boolean function using an 8:1 multiplexer is given. Finally, some common applications of multiplexers in communication systems, telephone networks, computer memory, and satellite transmission

1. Submitted to :
MR. MD. DARA ABDUS SATTER
Assistant Professor & Associate Head
Department of electrical and electronics
engineering ,FE
Submitted by:
NAME ID
MEHEDI HASAN------------------143-33-2159
MD HASIBUL ALAM--------------143-33-2227
Sec: A
Department of electrical and electronics engineering,FE
Welcome to discussion on
“ENCODER & MULTIPLEXER”

2. WHAT IS ENCODER ?
The encoder is a combinational circuit that performs the reverse
operation of the decoder. The encoder has a maximum of input 2 𝑛
and outputs n.
The simplest encoder is a 2 𝑛
-to-n binary encoder
One of 2 𝑛 inputs = 1
Output is an n-bit binary number
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2n
inputs
n
outputs
Binary
encoder

3. Encoders vs. Decoders
Decoder Encoder
Binary decoders/encoders
 n-to- 2n
 Input code : Binary Code
 Output code :1-out-of- 2n.
 2n -to-n encoder
 Input code : 1-out-of- 2n.
 Output code : Binary Code

4. Logic circuit for octal-to binary encoder [8-
line- 3-line ]

5. Truth table for octal-to binary encoder [8-line- 3-line ]

6. WHAT IS 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.

7. Implement Boolean function using 8:1 MUX
FOR F(A,B,C,D)=m(0,1,2,4,6,9,12,14)

8. 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
1. Communication system
2. Telephone network
3. Computer memory
4. Transmission from the computer system of a
satellite

9. THANKS TO ALL