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Sumit Verma @sumitverma added a Short note13 Oct 2016
Magnitude Comparator
Magnitude Comparator :
A combinational circuit that compares two input bits is called magnitude comparator.It consists of two input bits and three output bits.
If the input bits are X and Y then the output bits are corresponding to one of the case, X>Y, X=Y or X<Y.
We can write a table for magnitude comparator as :
| X | Y | F1 (X=Y) |
F2 (X<Y) |
F3 (X>Y) |
| 0 | 0 | 1 | 0 | 0 |
| 0 | 1 | 0 | 1 | 0 |
| 1 | 0 | 0 | 0 | 1 |
| 1 | 1 | 1 | 0 | 0 |
F1 =X'Y'+XY = X (Ex-NOR)Y
F2=X'Y
F3=XY'
The logic diagram for this implementation is as below:
