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It is used in the control logic and for representing controlled data.

Basically a transistor has two inputs where one of the inputs decides whether or not to output the other.

Imagine you have a vacuum cleaner. If the vacuum cleaner is on then the following two conditions are met:

1. The cable is connected to the wall.

2. You have the switch in on position.

These two conditions represent the two inputs in the transistor (both being "on" if you can hear your vacuum cleaner).

The output is represented by whether or not the vacuum cleaner is on.

The switch decides whether or not to let whatever electrical signal you may have through to the vacuum cleaners engine.

If switch is on then it outputs the signal from the cable. If the cable is not connected there will still be an output but it will be an "off".

Sorry about the potentially confusing analogy.

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15y ago

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