Experiment No. 5 bsc.3rd semester
To
study and verify the truth table g basic logic gates (NOR, AND, OR)
Apparatus Required
Prototyping board (Bread board) DC power
supply connecting wires .
Theory
AND,
OR and NOT are basic logic gates in electronic circuits because they are made
up and no .and electronic devices. in pats and out puts & logic gates can
occur only in two levels . These two levels are tern High and Low or truth and
false or ON and OFF or simply 1 and o .we use ally express values into truth
table. Logic gates are mainly based on Boolean
funcation .
NOT GATE
A
NOT gate is also known as inverter has only one input and only one output It is
a device whose output is always the complement & its input when the input
is 1 (one) the output is o and vice – versa .
With input variable A, the Boolean expression
for output can be written as .
Y
= Ᾱ
AND GATE
An
AND gate has two or more inputs but only
one output when all the inputs are 1 the output I there gate is 1 AND gate is
also called an all or nothing gate with input variables A and B the Boolean
expression for output is .
Y
= A . B
OR Gate
OR
gate may have two or two or more inputs but only one output if at least one I
the input is 1 the output will be 1 With input variables ‘A’ and ‘B’ the
Boolean expression for output is
Y
= A + B
Observation
1.
Truth table for NOT Gate .
|
Input |
Output |
|
A |
Y = Ᾱ |
|
0 |
1 |
|
1 |
0 |
2.
Truth table for AND gate
|
Input |
|
Output |
|
|
A |
B |
Y = A . B |
|
|
0 |
0 |
0 |
|
|
0 |
1 |
0 |
|
|
1 |
0 |
0 |
|
|
1 |
1 |
1 |
|
3.
Truth table for OR Gate.
|
Input |
|
Output |
|
A |
B |
Y = A .B |
|
0 |
0 |
0 |
|
0 |
1 |
1 |
|
1 |
0 |
1 |
|
1 |
1 |
1 |
Result
Truth
table for NOT , AND , OR gate are &
tained .
Precautions
1.
All the contacts should be tight
enough
2.
Since the components applied in the
circuit are semi – conductor materials the applied voltage should not be high.
Experiment No . 1 .4semester
Object
To
study the we in bridge oscillator and visualize effect on output frequency with
variation in RC combination .
Apparatus Used
2
mm patch card , oscilloscope .
Formula Used
.f
= 1/2π . √R₁.√R₂.√c₁.√c₂
If R₁ = R₂ = R
& C₁ = C₂ = C
Then
, f = 1/2π . √RC
Observation table
|
S . No |
Resistance value |
Theoretical value of resource frequency |
Practical value of resource frequencies |
|
1. |
R₄ = R₈ = 10K |
1.592 |
1.635 |
|
2. |
R₅ = R₉ = 20K |
0.796 |
0.820 |
|
3. |
R₆ = R₁ₒ = 39K |
0.408 |
0.419 |
|
4. |
R₇ = R₁₁ = 100K |
0.159 |
0.164 |
Result
Theoretical
value of resonance frequency = 0.738
Experimental value of resonance frequency =
0.759
Precautions
1. Make
the connection carefully .
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Note.
(Please note: if a particular experiment is not visible, please search for it using the search box—for example, Experiment No. 2. (To study the transistor bias stability.)
कृपया ध्यान दीजिये अगला एक्सपेरिमेंट न दिख रहा हो वो आप सर्च बॉक्स में सर्च कर लीजिये . जैसे , एक्साप्रिमेंट नंबर.2 या फिर (To study the transistor bias stability.)
