Experiment 3 - The AND-Transistor Logic (RTL)
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 can be build using a transistor circuit.
The truth table shows you the AND logic...
| A |
B |
Q |
| 0 |
0 |
0 |
| 0 |
1 |
0 |
| 1 |
0 |
0 |
| 1 |
1 |
1 |
Truth table of the AND logic.
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AND symbol in circuit diagrams.
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Transistor circuit of an AND logic.
(Enlarge)
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Circuit diagram of the AND logic with transistors.
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Use to the transistor circuit shown as the logic unit...
-
If one or both push-button switches
S1 and S2 is open,
the corresponding transistor blocks.
Due to the resistor R3a
there is 0 Volt at the output
(Q = 0).
-
If the push-button switches S1
AND S2
are closed, both transistors switch through
and a voltage applies to the output
(Q = 1).
