A decoder is a combinational circuit that converts binary information from "n" i/p lines to a maximum of 2nd unique output lines.a decoder is similar to demultiplexer with one exception that is their is no data input.the only i/p's are control bit's A,B,C as an figure below,
Examples.
3 line to 8 lines decoder (3 to 8 line) or binary to octal decoder.
The logic circuit is called one of a decoder because only one of 8 o/p is high at a time.when A,B,C is 001 then, Y1 AND gate has all i/p's and 8 o/p lines.it is also known as 3 to 8 line or binary to octal decoder.
Truth table of 3 to 8 line Decoder:
A B C Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
0 0 1 0 1 0 0 0 0 0 0
0 1 0 0 0 1 0 0 0 0 0
0 1 1 0 0 0 1 0 0 0 0
1 0 0 0 0 0 0 1 0 0 0
1 0 1 0 0 0 0 0 1 0 0
1 1 0 0 0 0 0 0 0 1 0
1 1 1 0 0 0 0 0 0 0 1
;
No comments:
Post a Comment