Nand gate, Computer Engineering

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The NAND gate.

The NAND gate is equivalent to an AND gate followed by a NOT gate so that the output is 0 when all of the inputs are high, otherwise the output is 1. There may be any number of inputs. The circuit symbol for a three input NAND gate is

863_nand Gate.png

The truth table for a three input NAND gate is

A

B

C

X

0

0

0

1

0

0

1

1

0

1

0

1

0

1

1

1

1

0

0

1

1

0

1

1

1

1

0

1

1

1

1

0

 

The Boolean algebra equivalent is

1483_nand Gate1.png


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