|Aug13-12, 07:59 PM||#1|
Logic Gates/ Truth Tables Trouble
Hey guys im having todo a resit paper for a maths module i failed and ive come up against a question on my paper where im stomped and dont know if im down the right road or not. Its truth tables from Boolean equations.
K = ( X + Y) . (X . Y)
I Came up with:
K X Y | X Y K | K 1 0 0 1 1 1 1 1 1 1 0 0 0 0 1 0 1 1 0 0 0 0 1 0 0 1 0 0
|Aug14-12, 03:11 AM||#2|
Hey Diearduk and welcome to the forums.
Your table is wrong: you need to use the same x and y values for each operation. I will create a new table and create an extra variable corresponding to the inverted X.
X Y Z = NOT X | Z OR Y | X AND Y | (Z OR Y) AND (X AND Y) 0 0 1 1 0 0 0 1 1 1 0 0 1 0 0 1 0 0 1 1 0 1 1 1
(NOT X + Y) . (X . Y) = (NOT X).X.Y + Y.X.Y = X.Y which is what we got above.
You should use these kinds of simplifications to give another check of whether you get something symbolic that matches up with your truth table.
|Aug14-12, 09:37 AM||#3|
Thanks Chiro, This forum and community looks great. Glad i could find it and thanks for your help :) Quick question tho was the Z meaning K? or was that the extra variable you made? i had a lecturer who really didnt educate anyone and just rambled on without explaining things :( meaning my whole class is pretty much as stomped as me.
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