# circuit diagram

• Feb 27th 2011, 10:38 PM
Phrass
circuit diagram
I NEED HELP!!!

Derive the Boolean expression for the following circuit diagram. Draw the Truth Table of the resulting circuit diagram.

[IMG]http://img191.imageshack.us/img191/80/circuit1.jpg

Write the function expression for the following circuit diagram:

[IMG]http://img580.imageshack.us/img580/2391/circuit2s.jpg

AB+C? far as i got
• Feb 27th 2011, 10:40 PM
topsquark
Quote:

Originally Posted by Phrass

Either the link is down or you have done it wrong.

-Dan
• Feb 27th 2011, 11:01 PM
Phrass
it's live now
• Feb 28th 2011, 06:00 AM
emakarov
Starting from the left, look at each logic gate's inputs. For the leftmost gates, these inputs are labeled by variables (A, B, or C). Over the line that leaves the gate on the right-hand side, write the inputs joined by the gate's operation.

For example, in the first picture, the top-left gate is AND. Its inputs are A, B, and C. So, over the line that leaves the gate on the right, write A AND B AND C, or A + B + C, depending on your notation. Repeat this moving from left to right.
• Mar 1st 2011, 01:53 AM
Phrass
so therefore the 1 diagram would be something like A+B+C(B'C')A+A'B'=F
• Mar 1st 2011, 02:20 AM
emakarov
In diagram 1, I get F = ABC + (A' + B') + AB'C'.