Decoder
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Transcript of Decoder
GREEN UNIVERSITY OF BANGLADESHDepartment: EEE (Eve)
Prepared For:
Chayan MondalLecturer, GUB
Prepared By:
Md. Sahed DewanID# 143010021
Course Title: Digital Electronics
DecoderX0
X1
D0
D1
D2
D3
Decoder
A Decoder is a logic circuit that accepts a set
of inputs that represents a binary number and
activates only the output that corresponds to
the input number.
What is Decoder
If a Decoder has n bits input data then the
output data will be 2n bits.
X0
X1
D0
D1
D2
D3
DECODER
n = 22n = 4
X0
X1
D0
D3
D6
D7
DECODERX2
D1
D2
D5
D4
n = 32n = 8
Block Diagram
DecimalDigit
Inputs LogicFunction
Outputs
X2 X1 X0
D0 D1 D2 D3 D4 D5 D6 D7
0 0 0 0 X2 X1 X0 1 0 0 0 0 0 0 0
1 0 0 1 X2 X1 X0 0 1 0 0 0 0 0 0
2 0 1 0 X2 X1 X0 0 0 1 0 0 0 0 0
3 0 1 1 X2 X1 X0 0 0 0 1 0 0 0 0
4 1 0 0 X2 X1 X0 0 0 0 0 1 0 0 0
5 1 0 1 X2 X1 X0 0 0 0 0 0 1 0 0
6 1 1 0 X2 X1 X0 0 0 0 0 0 0 1 0
7 1 1 1 X2 X1 X0 0 0 0 0 0 0 0 1
Truth Table
Circuit DiagramX2
X1
X0
D0D1D2D3D4D5D7 D6
Thank you