M SHARJEEL MUGHAL

B

S(HONS)CS A

R

OLL NO F-12-1057

TOPICS

1

GATES

2

HALF ADDER

3

FULL EDDER

GATES

A

ND GATE

O

R GATE

N

OT GATE

N

OR GATE

N

AND GATE

X

OR GATE

LOGIC GATES

T

he logic gate is an

electronic circuit that

operates on one or more

input signal to produce

standard output signal.

AND GATEG

raphic Symbol

A

lgebraic Function

T

ruth Table

A

nd gates is an electronic circuit that

generate

an output signal of 1,

only if all

input signals are also 1

OR GATE

Graphic Symbol

Algebraic function

Truth Table

OR gate is an electronic circuit

that generates an output signal of

1,if any of the input signal is also 1

NOT GATEG

raphic table

A

lgebraic Symbol

T

ruth Table

N

OT gate is an electronic circuit that

generat

e the reverse of the input signal knows

as not

or inverter

NOR GATEG

raphic Symbol

A

lgebraic Symbol

T

ruth Table

T

he output of a NOR gate will be 1

only when

all input are 0 and it will be 0 if any

input is a

1.

NAND GATE

G

raphic symbol

A

lgebraic Function

T

ruth Table

T

he output of NAND gate will be 1

if

any one of the input is 0, and it will be 0 only when all

input are 1

XOR GATE G

raphic Symbol

A

lgebraic Function

T

ruth Table

T

he output of XOR gate will be 0 when

the two

input is same and it will be 1 if any

one is 0.

ADDER

T

here are two types of ADDER

H

ALF ADDER

F

ULL ADDER

HALF EDDER

The input produce the sum and carry bits. Let A and B be the two input and S (for sum) and C (for carry) be the two output.

S=A’.B+A.B’C=AB

FULL ADDER

A FULL ADDER forms the Arithmetic sum of three input

bits. And in the output one is S

(for sum) and C (for carry).S = A’.B’.D+A’.B.D’+A.B’.D’+A.B.DC = A.B+A.D+B.D