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Logical Electronic

The NAND Gate

The NAND Gate

The NAND gate is the-most difficult to understand. All the-others are English words, so they-are easier to understand.  thething about NOR & NAND gates is that-they are like OR or AND gates, followed-immediately by a NOT gate. .So if you find them just to difficult, you can always remember them like that.

 

Output Q 0 if and only if   A=B=1.

 

 

A

B

Q

0

0

1

0

1

1

0

0

1

0

1

0

 

When asked to find a truth table for a circuit, it can-sometimes be helpful to use extra letters. These are usually X & Y, but any-letters can be used. The easiest way-would be to  look at the gate below.

 

The gates above are the-only gates you need to-know for the NEAB syllabus. But there is one other gate that is very useful. It is-called the eXclusive OR (XOR). You can buy-this in a chip, or you can build-your own. It can be constructed in the following way.


Keywords : NAND, Gate, NOR Gate, Gate, Decimal, Binary, Hexodecimal, Logic Gates
Writer : delon  |
17 Mar 2006 Fri   
|  6.364 Views
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