Logic Gates

Logic Gates

1. They represent digital switches in the CPU

2. A U represent an OR Gateand a upside down U represents and AND Gate

3. For an AND Gate, both inputs must be on for the output to be on.

4. For an OR Gate, only one input or both need to be turned on for the output to be on.

5. For a NOT Gate, if the input is on then the output is off.

6. Logic gates can be represented by notation such as Q = A U B would represent Q = A or B

7. Make sure that all logic gates are clearly drawn differently from each other

8. When drawing logic gates, whats in brackets goes first in the sequence

9. Always label inputs and outputs

10. Always draw the circle on the not gate

11. A circle after an AND / OR makes it a NAND / NOR

12. Always use BIDMAS for logic gates

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