A decoder is a digital circuit that converts binary inputs into decimal outputs, with n inputs producing 2n outputs. It transforms digital input signals into an equivalent decimal code, exemplified by common types such as the 2-to-4 line decoder. The document discusses the truth tables and functioning of a 3-to-8 line decoder.

2. DECODER

3. BY: Adeel Rasheed

4. What is decoder?
 Is binary input convert to decimal outputs

5. What is decoder
 A digital circuit.
 Have n number of inputs.
 And 2n number of outputs.

6. DECODER
 The name decoder means to translate or
decode coded information from one format
into another ,so a digital decoder transforms
a set of digital input signals into an equivalent
decimal code at its output.

7. DECODER
 A common type of decoder is the line
decoder which takes an n-digit binary
number and decodes it into 2n data lines

8. DECODER
 The simplest is the 2to 4 line decoder.
The truth table

9. DECODER
 “A” is the address
 “D” is the data line
 “D1” is “A”
 “D0” is NOT of “A” (NOT Gate)
The circuit looks like

10. Circuit 3 to 8

11. Truth Table of a 3-to-8-line
Decoder