We were doing digital comparators in class given conditions A : An-1 An-2..... A

Question

We were doing digital comparators in class given conditions

A : An-1 An-2..... A1 A0

B : Bn-1 Bn-2.... B1 B0

And if A > B G = 1 L = 0

B > A, G = 0, L =1

A = B, G = L = 1

However I am confused as to why on the truth table my teacher put columns for A2, B2 , G2, L2, G3 , L3

Then made dont care conditions as well. Could someone please tell me how to set up the truth table for this?

I have shown the picture of the three comparators and the first two rows of the truth table, and I am confused as to what variables we will include on our truth table.

Explanation / Answer

Please follow the steps like this by putting values of A0, B0 so as to get the O/P and tabulate the same

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