output of simple logic circuit

beenthere

Joined Apr 20, 2004
15,819
Have you tried to determine the states of A & B that will produce Y? After that, it's simple to work in the C input. It's helpful if you label the gates, too (U1, U2, etc.).
 

Georacer

Joined Nov 25, 2009
5,182
Start from the list with all possible combinations of A, B and C. Then work your way from the left to the right of the circuit. For given A and B find the output of the first gate. Then use it along with B to find the output of the second gate and so on.
 

Wendy

Joined Mar 24, 2008
22,580
Basically what has been said previous. Just make and use a truth table. If you need visual assistance draw the circuit 8 times, and use a red or green magic marker to record the output of each gate to fill the truth table.
 
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