Logic Gates Ppt

  • May 2020
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  • Pages: 13
Logic Gates

AND Gate

NAND Gate

XOR Gate

OR Gate

NOR Gate

XNOR Gate

BUFFER Gate

NOT Gate

SUMMARY

AND Gate If both of the INPUT is high then the OUTPUT is high. TRUTH TABLE

INPUT OUTP UT A

A B

Y=A.B

B

Y

0

0

0

0

1

0

1

0

0

1

1

1

OR Gate If at least one of the INPUT is high then the OUTPUT is high. TRUTH TABLE

INPUT OUTP UT A

A B

Y=A+B

B

Y

0

0

0

0

1

1

1

0

1

1

1

1

NOT Gate If INPUT is high then the OUTPUT is low .If INPUT is low then the OUTPUT is high.

TRUTH TABLE

A

Y=A

INPUT

OUTPUT

A

Y

0

1

1

0

BUFFER Gate If INPUT is high then the OUTPUT is high .If INPUT is low then the OUTPUT is low.

TRUTH TABLE

A

Y=A

INPUT

OUTPUT

A

Y

0

0

1

1

NAND Gate If at least one of the INPUT is low then the OUTPUT is high. TRUTH TABLE

INPUT OUTP UT A

A B

Y=A.B

B

Y

0

0

1

0

1

1

1

0

1

1

1

0

NOR Gate If both of the INPUTs are low then the OUTPUT is high. TRUTH TABLE

INPUT OUTP UT A

A B

Y=A+B

B

Y

0

0

1

0

1

0

1

0

0

1

1

0

XOR Gate If all the INPUTs aren’t equal then the OUTPUT is high. TRUTH TABLE

INPUT OUTP UT A

A B

Y=A+B

B

Y

0

0

0

0

1

1

1

0

1

1

1

0

XNOR Gate If all the INPUTs are equal then the OUTPUT is high. TRUTH TABLE

INPUT OUTP UT A

A B

Y=A+B

B

Y

0

0

1

0

1

0

1

0

0

1

1

1

SUMMARY AND Gate Y=A.B

OR Gate Y=A+B

BUFFER Gate Y=A

NAND Gate Y=A.B

XOR Gate Y=A+B

NOR Gate Y=A+B

XNOR Gate Y=A+B

NOT Gate Y=A Where A & B are INPUTs and Y is OUTPUT.

THE END

Designed by Rasika

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