)
(2
.
Experiment No
logic Gates
:
Objective
To
study
(
NAND, NOR, AND, OR, NOT, X-OR, X-NOR)
Gates
and
to
realize
the Boolean
equation
for
the
Gates
Introduction:
Logic Gates:
Logic gate is an electronic circuit manufactured mainly as integrated
circuit
(IC)
unit
by
employing
transistors,
diodes,
and
other
solid
state
components.
The
Primary
Logic
gates
(AND ,
OR
and
NOT )
are
used
to
implement
different
Boolean
equations
as
well
as
the
constructing
of
other
logic
gates.
Logic
gates
have
one
or
more
input
terminals
and
only
one
output
terminal.
33002
-
Module
KL
Equipments required
:
Procedures
(a) NAND Gate (Module KL-33002 block b)
1.
Module
KL-33002
block
b
will
be
used
in
this
section.
2. Connect the inputs
(A,
A1)
to
data
switch
SW0,
SW1
on
the TTL
level.
3
.
Connect
the
output
F2
to
the
logic
indicator
L0,
then
follow
the
input
sequences
in
table
(1-1) to
record
the
output
.
KL-31001 Base unit
Table(1-1)
INPUT
OUTPUT
SW1(A1) SW0(A)
F2
0
0
0
1
1
0
1
1
(b)
NOR
Gate
(Module
KL-33002
block
a)
1.
Module
KL-33002
block
a
will
be
used
in
this
section.
2.
Connect
the
inputs
A1,
B1
to
the
data
switch
SW0, SW1
on
the
TTL
level.
3. Connect the output F3 to the logic indicator L0, then follow the input sequences in
table(1-2)
to
record
the
output
F3.
Table(1-2)
INPUT
OUTPUT
SW1(A1) SW0(B1)
F3
0
0
0
1
1
0
1
1
(c). NOT Gate (Module KL-33002 block c)
1. U4c of Module KL-33002 block c will be used in this section.
2. Connect input F3 and output F4 of U3c to SW0 and L0 respectively. Follow
the input sequences in table(1-3) and record outputs.
Table(1-3)
INPUT
OUTPUT
F4
0
1
SW0(F3)
(d) AND Gate (Module KL-33002 block b & c)
1. Block b and c of module KL-33002 will be used in this section.
2. Connect the
inputs A, A1 (block b) to the
data
switch
SW0,
SW1
on
the
TTL
level.
3
. Connect the output F2 (block b) to the Not gate input F3 (block c). Then connect the
output F4 (block c) to logic indicator L0, then follow the input sequences in table (1-4) to
record the output.
Table(1-4)
INPUT
OUTPUT
SW1(A1) SW0(A)
F4
0
0
0
1
1
0
1
1
(e) OR Gate (Module KL-33002 block
a & c
)
1. block
a
and
c of
module
KL-33002 will be used in this section.
2. Connect the inputs A1, B1 (block
a)
to data switch SW0, SW1 on the TTL level.
3.
Connect
the
output
F3
(block
a)
to
the
Not
gate
input
F3
(block
c).
Then
connect
the
output
F4
(block
c)
to
logic
indicator
L0,
then
follow
the
input
sequences
in
table
(1-5)
to
record
the
output.
Table(1-5)
INPUT
OUTPUT
SW1(A1) SW0(B1)
F4
0
0
0
1
1
0
1
1
(f) XOR Gate (Module KL-33002 block c)
1. block c of module KL-33002 will be used in this section.
2. Connect the inputs A, B (block c) to data switch SW0, SW1 on the TTL level.
3.
Connect the output F5 to logic indicator L0, then follow the input sequences in
table (1-6) to record the output.
Table(1-6)
INPUT
OUTPUT
SW1(A) SW0(B)
F5
0
0
0
1
1
0
1
1
(g) X-NOR Gate (Module KL-33002 block
c
)
1. block c of module KL-33002 will be used in this section.
2. Connect the inputs A, B (block c) to data switch SW0, SW1 on the TTL level.
3. Connect the output F5 to the Not gate input F3. Then connect the output F4 to
logic indicator L0, then follow the input sequences in table (1-7) to record the output.
Table(1-7)
INPUT
OUTPUT
SW1(A1) SW0(B1)
F4
0
0
0
1
1
0
1
1
:
Discussion
1. What is a logic gate?
2. When does the AND
gate produce
a
high
output?
3. When does the OR gate
produce
a
low
output?
4. List one
application for using X-OR gate.
5. Design a logical
circuit
that
satisfies
the
following
equation
before and after
simplifying
it
6. Design a 5-input OR gate by using 2-input OR gates?