Author Topic: Digital 101: Logic Gates  (Read 4682 times)

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Offline Lazarus

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Digital 101: Logic Gates
« on: December 16, 2014, 04:59:23 PM »
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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Offline Lazarus

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Re: Digital 101: Logic Gates
« Reply #1 on: December 16, 2014, 05:05:51 PM »
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,


Offline Lazarus

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Re: Digital 101: Logic Gates
« Reply #2 on: December 16, 2014, 05:11:54 PM »
The AND Gate,

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


Offline Lazarus

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Re: Digital 101: Logic Gates
« Reply #3 on: December 16, 2014, 05:20:43 PM »
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,


Offline Lazarus

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Re: Digital 101: Logic Gates
« Reply #4 on: December 16, 2014, 05:26:29 PM »
The OR Gate,

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


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Re: Digital 101: Logic Gates
« Reply #5 on: December 16, 2014, 05:30:18 PM »
The NOR Gate,

The NOR Gate is simply an OR Gate with its output inverted, so its output goes low when either or both its inputs are high,


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Re: Digital 101: Logic Gates
« Reply #6 on: December 16, 2014, 05:35:07 PM »
The Exclusive OR Gate,

The Exclusive OR Gate output goes high when either of its inputs are high, but not both,


Offline Lazarus

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Re: Digital 101: Logic Gates
« Reply #7 on: December 16, 2014, 05:38:47 PM »
The Exclusive NOR Gate,

The Exclusive NOR Gate is simply an Exclusive OR Gate with its output inverted, so its output goes low when either of its its inputs are high, but not both,