Logic GatesLogic Gates

AND Gate

OR Gate

XOR Gate

BUFFER Gate

NAND Gate

NOR Gate

NOT Gate

XNOR Gate

SUMMARY

TRUTH TABLE

AND GateAND Gate

If both of the INPUT is high then the OUTPUT is high.

AA BB YY

0 0 0

0 1 0

1 0 0

1 1 1

INPUTINPUT OUTPOUTPUTUT

A

B

Y=A.B

TRUTH TABLE

OR GateOR Gate

If at least one of the INPUT is high then the OUTPUT is high.

AA BB YY

0 0 0

0 1 1

1 0 1

1 1 1

INPUTINPUT OUTPOUTPUTUT

A

B

Y=A+B

A

Y=A INPUTINPUT OUTPUTOUTPUT

AA YY

1

0

0

1

TRUTH TABLE

NOT GateNOT Gate

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

A

Y=A INPUTINPUT OUTPUTOUTPUT

AA YY

1

0

1

0

TRUTH TABLE

BUFFER GateBUFFER Gate

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

TRUTH TABLE

NAND GateNAND Gate

If at least one of the INPUT is low then the OUTPUT is high.

AA BB YY

0 0 1

0 1 1

1 0 1

1 1 0

INPUTINPUT OUTPOUTPUTUT

A

B

Y=A.B

TRUTH TABLE

NOR GateNOR Gate

If both of the INPUTs are low then the OUTPUT is high.

AA BB YY

0 0 1

0 1 0

1 0 0

1 1 0

INPUTINPUT OUTPOUTPUTUT

A

B

Y=A+B

TRUTH TABLE

XOR GateXOR Gate

If all the INPUTs aren’t equal then the OUTPUT is high.

AA BB YY

0 0 0

0 1 1

1 0 1

1 1 0

INPUTINPUT OUTPOUTPUTUT

A

B

Y=A+B

TRUTH TABLE

XNOR GateXNOR Gate

If all the INPUTs are equal then the OUTPUT is high.

AA BB YY

0 0 1

0 1 0

1 0 0

1 1 1

INPUTINPUT OUTPOUTPUTUT

A

B

Y=A+B

SUMMARYSUMMARYAND GateAND Gate

Y=A.B Y=A.B NAND GateNAND Gate

Y=A.BY=A.BXOR GateXOR Gate

Y=A+BY=A+B

OR GateOR Gate

Y=A+BY=A+BNOR GateNOR Gate

Y=A+BY=A+BXNOR GateXNOR Gate

Y=A+BY=A+B

BUFFER GateBUFFER Gate

Y=AY=ANOT GateNOT Gate

Y=AY=AWhere A & B are INPUTs Where A & B are INPUTs

and Y is OUTPUT. and Y is OUTPUT.

THE ENDTHE END

Designed by Rasika