# output of simple logic circuit

Discussion in 'Homework Help' started by sagar474, Jul 22, 2010.

1. ### sagar474 Thread Starter New Member

Jul 22, 2010
16
0

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

2. ### beenthere Retired Moderator

Apr 20, 2004
15,815
283
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.).

3. ### Georacer Moderator

Nov 25, 2009
5,151
1,266
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.

4. ### Wendy Moderator

Mar 24, 2008
20,772
2,540
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.

5. ### raihanbd89 New Member

Jul 30, 2010
2
0
Wht r d input of d right most nand and left most nor gate?? Actually i can't figure it out.

6. ### beenthere Retired Moderator

Apr 20, 2004
15,815
283
See post #3. Make a truth table:

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