Encoders and Decoders in Digital Electronics Encoders and decoders are fundamental components in digital electronics, crucial for data manipulation and communication within digital systems. An encoder is a device that converts information from one format or code to another, typically from analog or human-readable data into a digital format. It compresses multiple input lines into fewer output lines, enabling the representation of data in a more compact form. For instance, a 4-to-2 binary encoder takes 4 input lines and encodes them into 2 binary output lines, reducing the number of required bits. Conversely, a decoder performs the opposite function of an encoder. It takes the encoded data and converts it back into its original format. This process involves expanding the compressed data into its initial multiple-line form. A common example is the 2-to-4 binary decoder, which takes 2 binary input lines and decodes them into 4 distinct output lines, effectively reconstructing the original data. Both encoders and decoders are essential for efficient data handling, storage, and communication in digital systems. They are widely used in applications such as data multiplexing, memory addressing, and digital display systems. By facilitating the conversion between different data formats, encoders and decoders ensure the proper functioning and optimization of digital circuits and systems, making them indispensable in the field of digital electronics.

1. ENCODERS
&
DECODERS
Exploring the components of a circuit
Presented By
Reduan Ahmad: 232-35-016
Abdullah Al Noman: 232-35-003
Asraful Alam: 232-35-214
Mohammad Ali Nayeem: 232-35-022

2. Section : A
ID : 232-35-016
Reduan Ahmad

3. Today we’ll Focus
Encoders
Decoders
Importance in digital electronics

4. What is Encoders & Decoders?
An encoder is a device
that converts data from
one format to another.
A decoder is a logic
circuit that converts
coded inputs into
coded outputs.

5. Importance in digital
electronics
Digital electronics are more important than analog
electronics because they are more accurate, reliable,
and energy efficient. Digital signals are less capable to
noise and interference, making them more reliable in
transmission mediums like satellite TV and cell phone
networks. Digital data is also more compact and less
likely to be corrupted, making it easier to store and
maintain over time.

6. Section : A
ID : 232-35-003
Md. Abdullah Al Noman

7. Encoder’s

8. Decimal to BCD
Encoder
There are many types of Encoders
Octal To Binary
Encoder
Hexadecimal to
Binary Encoder
4 to 2 Encoder
Types Of Encoders

9. Decimal To Binary Coded
Decimal (BCD) Encoder
It converts Decimal Number (0-9)
input to BCD Output.

10. Decimal To BCD Truth Table

11. Logic Circuit
The logical expression of the
term A0, A1, A2, and A3 is as
follows:
A3 = Y9 + Y8
A2 = Y7 + Y6 + Y5 +Y4
A1 = Y7 + Y6 + Y3 +Y2
A0 = Y9 + Y7 +Y5 +Y3 + Y1

12. Section : A
ID : 232-35-214
Asraful Alam

13. Decoder’s

14. Binary to Octal Decoder
A
B
C
Figure : Block Diagram
A Binary-to-Octal decoder has three input
lines and eight output lines. When a 3-bit
input code is applied to the decoder, one of the
8 output lines corresponding to that input
code is activated. This decoder is also called a
3-line-to-8-line decoder or 1-of-8 decoder. Its
truth table is given below.

15. 3 to 8 Decoder Truth-Table

16. 3 to 8 Decoder Circuit
D0
D1
D2
D3
D4
D5
D6
D7
C
A B
If the input is A = B = C = 0(LOW) Output D0
will be HIGH. So, the output expression for
D0 = A’B’C’ Similarly,
2. D1 =A’B’C . 3. D2 =A’BC’.
4. D3 = A’BC. 5. D4 =AB’C’.
6. D5 =AB’C . 7. D6 =ABC’ .
8. D7 = ABC

17. Section : A
ID : 232-35-022
Mohammad Ali Nayeem

18. Encoders and Decoders in Communication
Systems

19. Encoders and Decoders in Memory Systems
Memory Address Decoding
Purpose: Translates a
memory address (provided by
the CPU) into a specific
location within the memory
chip where data is stored or
retrieved.
Decoder's Role: A decoder
circuit selects one particular
memory location out of many
based on the address bits.

20. RAM and ROM Access Control
Encoders: In some systems, encoders
may be used to generate control
signals that enable or disable access
to specific memory chips or regions.
Decoders: Primarily responsible for
decoding memory addresses, but they
can also be involved in generating
timing and control signals for memory
access.

21. Conclusion
The Future of Encoders and Decoders
As technology advances, so too will the
complexity and sophistication of the
encoding and decoding schemes
employed.
Look for continued innovation in areas
like error correction, data compression,
and encryption, as we strive to achieve
faster, more reliable, and more secure
communication and data storage
systems.

22. THANK YOU!
FOR YOUR TIME