design function generator

KINGDOM OF SAUDI ARABIA Ministry of Higher Education

KING ABDULAZIZ UNIVERSITY

Faculty of Engineering at Rabigh

Electrical Engineering Department

كلية الهندسة برابغ

قسـم الهندسة الكـهربائية

Acknowldgment.

Abstract.

Introduction .

Part Of Project.

Simulation In Multisim.

Final Project.

Date sheet of 741 & 1458

Conclusion.

Reference.

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 .







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.

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







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 .

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)







Integrator ( to Convert Square wave to triangle wave)

Amplifier .(Inverting Op-Amp)







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

Simulation on Multisim







Osclliscope two channel (Channel A in Osclliator Channel B in Amp)

Osclliscope two channel (Channel A in Comparator Channel B in Amp)

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







Final Project Project on test board

Output Of Osclliator

Output Of Comparator

Output Of Integrater and Oscillator







Output Of Integrator and Comparator

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”, 5

th Edit.

2) Floyd, “Electronics Devices”, 7th

Edit.