This document describes an electrical engineering student project to build a function generator circuit using operational amplifiers. The project is divided into four parts: an oscillator to generate a sine wave, a comparator to convert the sine wave to a square wave, an integrator to convert the square wave to a triangle wave, and an amplifier. The circuits were designed and simulated using Multisim software. Hardware prototypes were then constructed and tested to produce the desired sine, square, and triangle wave output signals. The document provides details on the circuit design and components used for each section, as well as the testing and results obtained from the completed project.

1. KINGDOM OF SAUDI ARABIA
Ministry of Higher Education
KING ABDULAZIZ UNIVERSITY
Faculty of Engineering at Rabigh
Electrical Engineering Department
‫برابغ‬ ‫الهندسة‬ ‫كلية‬
‫الكـهربائية‬ ‫الهندسة‬ ‫قسـم‬
 Acknowldgment.
 Abstract.
 Introduction .
 Part Of Project.
 Simulation In Multisim.
 Final Project.
 Date sheet of 741 & 1458
 Conclusion.
 Reference.

2. Acknowldgment
First of all , We would like to thank Dr. Farid Shawqi and Eng. Atif who has
been our supervisor during our project and provided us with much appreciated
help and advice .
Secondly , We would like to thank our families for their financial support of this
project.
Finally, We would like to give very special thank to our parents for their social
support and great encouragement during our project.

3. KINGDOM OF SAUDI ARABIA
Ministry of Higher Education
KING ABDULAZIZ UNIVERSITY
Faculty of Engineering at Rabigh
Electrical Engineering Department
‫برابغ‬ ‫الهندسة‬ ‫كلية‬
‫الكـهربائية‬ ‫الهندسة‬ ‫قسـم‬
Abstract
This Project covers the basis and design of the Function generator. The Function generator
will generate Sinsoudial , Square Wave and triangle wave . The project is divided into 4
parts: oscillator, Comparator , Integrator and amplifier . in this project will use two ICs all
741 & 1485 .This report includes all circuits that use in project.

4. Introduction
In this Project We use 4 parts :
 Oscillator
An Oscillator is a circuit that produces a periodic waveform on its output with only the dc
suplly voltage as input .
Oscillator Comparator Integrator
Amplifier

5. KINGDOM OF SAUDI ARABIA
Ministry of Higher Education
KING ABDULAZIZ UNIVERSITY
Faculty of Engineering at Rabigh
Electrical Engineering Department
‫برابغ‬ ‫الهندسة‬ ‫كلية‬
‫الكـهربائية‬ ‫الهندسة‬ ‫قسـم‬
Two major classifications for oscillators are:
1. feedback oscillators
2. relaxation oscillators.
Oscillators With RC Feedback Circuits
Three types of feedback oscillators that use RC circuits to produce sinusoidal outputs are:
1. Wien-bridge oscillator
2. phase-shift oscillator
3. twin-T oscillator.
We will use Wien-Bridge Osclillator to produce sinwave.
# The Wien-Bridge Osclillator .

6.  Comparator
One application of an op-amp used as a comparator is to determine when an input voltage
exceeds a certain level. ( to Convert Sinwave to Square wave)

7. KINGDOM OF SAUDI ARABIA
Ministry of Higher Education
KING ABDULAZIZ UNIVERSITY
Faculty of Engineering at Rabigh
Electrical Engineering Department
‫برابغ‬ ‫الهندسة‬ ‫كلية‬
‫الكـهربائية‬ ‫الهندسة‬ ‫قسـم‬
 Integrator
( to Convert Square wave to triangle wave)

8.  Amplifier .(Inverting Op-Amp)

9. KINGDOM OF SAUDI ARABIA
Ministry of Higher Education
KING ABDULAZIZ UNIVERSITY
Faculty of Engineering at Rabigh
Electrical Engineering Department
‫برابغ‬ ‫الهندسة‬ ‫كلية‬
‫الكـهربائية‬ ‫الهندسة‬ ‫قسـم‬
Parts Of Project.
PARTS No
IC 741 (OP-AMP) 3
IC 1458 (2 OP-AMP) 1
Resistors 9
Capacitors (0.1uF) 3
Power Supply 15V 1
Osclliscope 1
Potentiometer (100 k ohm) 2

10. Simulation on Multisim

11. KINGDOM OF SAUDI ARABIA
Ministry of Higher Education
KING ABDULAZIZ UNIVERSITY
Faculty of Engineering at Rabigh
Electrical Engineering Department
‫برابغ‬ ‫الهندسة‬ ‫كلية‬
‫الكـهربائية‬ ‫الهندسة‬ ‫قسـم‬
Osclliscope two channel (Channel A in Osclliator Channel B in Amp)
Osclliscope two channel (Channel A in Comparator Channel B in Amp)

12. Osclliscope two channel (Channel A in Integrator Channel B in Amp)

13. KINGDOM OF SAUDI ARABIA
Ministry of Higher Education
KING ABDULAZIZ UNIVERSITY
Faculty of Engineering at Rabigh
Electrical Engineering Department
‫برابغ‬ ‫الهندسة‬ ‫كلية‬
‫الكـهربائية‬ ‫الهندسة‬ ‫قسـم‬
Final Project
Project on test board
Output Of Osclliator

14. Output Of Comparator
Output Of Integrater and Oscillator

15. KINGDOM OF SAUDI ARABIA
Ministry of Higher Education
KING ABDULAZIZ UNIVERSITY
Faculty of Engineering at Rabigh
Electrical Engineering Department
‫برابغ‬ ‫الهندسة‬ ‫كلية‬
‫الكـهربائية‬ ‫الهندسة‬ ‫قسـم‬
Output Of Integrator and Comparator

16. Conclusion
Thanks god for blessing us in the end of this project , Our project give the reader some
information about uses of Op-Amp , In this Project We learend how do we design a finction
geanerator by op-amp .
Reference
1) Sedra, A.S. and Smith K.G, “Microelectronic Circuits”, 5th
Edit.
2) Floyd, “Electronics Devices”, 7th
Edit.