Download 6-SIMULATION OF TRANSFER FUNCTION USING OP

6-1
6. SIMULATION OF TRANSFER FUNCTION USING OP-AMPS
AIM:
To simulate the transfer function using Op-Amps, by using the circuits Integrator,
Non inverting amplifier and summing amplifier.
APPARATUS:
Op- Amps IC -741 -3 NO’S
Capacitor 0.1μF -1 No.
Resistor 10 KΩ -5 No’s
2 KΩ- 2 No.’s
100KΩ- 1 No.
Function Generator, CRO & probes, connecting wires.
THEORY:
1. Op-amp is a operational amplifier, which performs arithmetic operations.
2. Op-amp pin configuration contains 8-pins, generally it is IC 741
3. In 741 second and third pins are inverting and non-inverting pins, it is operated in
conduction mode by giving biasing voltages - VEE and VCC to the 4th and 7th pins
respectively.
4. It is a high gain amplifier.
5. In inverting mode the phase shift between input and output is 1800, where as in
non-inverting mode the input and output signals are in phase.
6. In integrator circuit output is integration of input signal.
CIRCUIT DIAGRAM:
Fig (i)
6-2
PROCEDURE:
1. Connect the circuit as per the circuit diagram shown in fig (i).
2. A square wave input is given to both the integrator and non inverting amplifier
circuits.
3. +Vcc and –Vee are applied as +10v and -10v at 7 and 4 pins respectively for
every circuit shown in the circuit diagram.
4. Individual out puts V01 and V02 of integrator and non inverting amplifier are
summed by using a summing amplifier which is shown in figure.
5. The output waveform of integrator, non-inverting amplifier and summing
amplifier are observed and plotted on the graph
THEORITICAL CALCULATIONS:-.
For the integrator circuit,
R 
-  f 
R
K
10
T1   1   

1  sR f C  (1  sR f C ) (1  .01s)
For the Non- inverting amplifier,
T2  1  R f R1   2
For summing amplifier
T  T1  T2
 2-
10
(1  .01s)
6-3
MODEL GRAPH:
RESULT:
The transfer function of the op-amp was simulated.