1) A
combinational circuit that converts binary information from n input lines to a
maximum of 2n unique output lines
2) The decoder
can be represented as n*m
3) The best
example for decoder is 3*8.
4) In this
example there are 3 input lines and 8 output lines
5) Let us
consider that 3 input lines are A, B, C.
6) Let us
consider that 8 output lines are D0, D1, D2,D3,D4,D5,D6,D7
7) The circuit
diagram for 3*8 decoder is represented as shown below.
8) In the
decoder the 3 inverters are provided for compliment of the input and each
output is represented by using AND gate
9)The
application of the decoder is binary to octal conversion.
10)The input variables are represented as binary
numbers and the outputs are represented with 8 digits in the octal number
system.
11) In 3*8 decoder 3 input lines connected to 8 output
lines
12) The
input output combination for decoder is represented in the following truth
table.
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