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Digital 101: Logic Gates

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Lazarus:
The Buffer,

A buffer is often used in digital logic to condition a signal, and also to buffer a signal up to the level needed to drive the next stage, basically you can think of it as simply a hopped up amplifier who's output is either all the way ON or completely OFF,



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Lazarus:
The NOT Gate,

also called an Inverter, or Inverting Buffer,

The NOT Gate does exactly the same thing as the Buffer except its output is inverted,

Lazarus:
The AND Gate,

The AND gate output goes high when both its inputs are high,   

Lazarus:
The NAND Gate,

the NAND Gate is simply an AND Gate with its output inverted, so its output goes low when both its inputs are high,

Lazarus:
The OR Gate,

The OR Gates output goes high when either or both its inputs are high,

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