- Logic gates can be combined to produce different outputs
- The combination of two or more logic gates forms a logic circuit
- A logic diagram is a visual representation of combinations of logic gates within a logic circuit
An example of Logic Circuit
- In this diagram, the inputs are represented by A and B
- P is the output of the OR gate on the left and becomes the input of the NOT gate. This is called an intermediary output
- Q is the final output of the logic circuit
An example of Logic Circuit
- This logic circuit contains three inputs (A, B and C)
- It contains a NAND gate, a NOT gate, a NOR gate and finally an OR gate
- X is the final output
- This logic circuit can be represented as a logic expression as
X=((NOT(A NAND B) OR (B NOR C
