Experiment 2 - The AND Gate
The AND gate combines two inputs with the AND logic.
With the AND logic the result Q
can only be equal to 1 if the inputs A AND
B are equal to 1.
This logic is the same logic as in the language usage:
" The house is closed (Q),
if the window (A)
and the door (B) are closed".
- If the window and the door are open (A = 0,B = 0),
the house is open (Q = 0).
- If the window is open (A = 0) and the door is closed (B = 1),
the house is open (Q = 0).
- If the window is closed (A = 1) und the door is open (B = 0),
the house is open (Q = 0).
- If the window and door are closed (A = 1, B = 1),
the house is closed (Q = 1).
This is shown in the truth table...
| A |
B |
Q |
| 0 |
0 |
0 |
| 0 |
1 |
0 |
| 1 |
0 |
0 |
| 1 |
1 |
1 |
Truth Table of the AND logic.
|
AND symbol in circuit diagrams.
|
A AND circuit.
(Enlarge)
|
With one of the four AND gates on the C-MOS IC 4081
you can build an AND logic circuit as shown in the picture.
The AND logic is not the only way to logically combine two inputs ...
|
