# output of simple logic circuit

#### sagar474

Joined Jul 22, 2010
16

what is the out put Y of this logic circuit?
those are nand and nor gates

#### 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
23,053
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.

#### raihanbd89

Joined Jul 30, 2010
2
Wht r d input of d right most nand and left most nor gate?? Actually i can't figure it out.

#### beenthere

Joined Apr 20, 2004
15,819
See post #3. Make a truth table:

A..B..C..Y
0..0..0..?
1..0..0..?
etc.