Logic Gates

1. A logic gate is a physical device that performs a logical operation on one or more logical inputs, and produces a only one logical output.
2. The input is the signal or data that fed into a logic gate whereas the output is the result from processing the inputs by using the operation of the logic gate.
   
3. The input and output can be either high (denoted by 1) or low (denoted by 0).
4. Gates are identified by their function. The 5 basic logic gates that you need to know under SPM syllabus are
1. the AND gate
2. the OR gate
3. the NOT gate
4. the NAND gate
5. the NOR gate
5. Logic gates primarary work using diodes and transistors as switches.