ele341 project opamp

8/10/2019 ELE341 Project OPAmp

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American University of SharjahSchool of EngineeringDepartment of Electrical Engineering

ELE 341 - Electronics II Class Project

TITLE: Applications of Operational Amplifiers

GRADE: 10%

DUE DATE: Dec. 16, Full Report

INSTRUCTOR: Dr. Anas Al Tarabsheh

LAB INSTRUCTOR: Mr. Narayanan

OBJECTIVES:

This project is about the use of the operational amplifiers, covered in the class, in performingmathematical operations such as integration, summation, and differentiation. You are going toanalyze and design an op-amp circuit to solve a given differential equation. The analysis is based on

the "ideal" op-amp assumptions and performed in the time domain and the frequency domain.

Your task is to design, simulate and build an op-amp circuit to solve a given system. Your final

report should include the followings:

A) Your hand analysis (apply concepts covered in the class)

B) MATLAB simulation

C) PSPICE simulation

D) Hardware of your design

This project is split into two parts:

Part I

1) Calculate the gain (transfer function)in

ou t

v

vof the circuit, shown in Figure 1, for

kRRRRR 10254321 using the analysis techniques covered in the class.

2) Plot the maximum gain of the circuit (using MATLAB) as a function of 3R

kR 10003 , while kRRRR 102 5421 . Find the value of 3R at which

the gain becomes 50% of its maximum.


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3) Circuit simulation using PSPICE :

a. For kRRRRR 102 54321 ! plot tvin and tvout then record the

ratio between poutv (peak output-voltage) and pinv #peak input-voltage). (Compareit with 1) )

b. For kRRRR 102 5421 ! vary 3R until the ratiopin

pou t

v

v

falls down to

50% of your result of a) ( Compare your results with 2)).

Figure 1: Multiple feedback op-amp


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Part IIThe resistors R2and R5are replaced now by C2and C5, respectively, as shown in Figure 2.

"#$%&' ()Multiple feedback op-amp filter

4) Simulate, in PSPICE, the circuit shown in Figure 2 for kRRR 102 431 ,

FCC 152

! and record and store tvout $

5) Calculate and plot (using MATLAB) the gain (transfer function) svsv

in

out of the circuit

shown in Figure 2 for kRRR 102 431 and FCC 152 $ Write the transfer

function in the following form:

svasvbSbSb inout 00122 (1)

Where the variables b2, b1, b0, and a0are constant numbers and depend on the impedance

values of the elements. The last equation represents a second-order differential equation asfollows:

tvatvb

dt

tdvb

dt

tvdb inout

outout0012

2

2 (2)

6)

Design an op-amp circuit that produces the output voltage tvout of equation (2). Thecircuit may consist of inverting, non-inverting, summing, integrator, , amplifiers.7) Simulate your design circuitby PSPICE and compare the simulated output voltage tvout

with the simulated output voltage in step 4).

8) Implement your design circuit in the lab and compare the measured output voltage tvout with the simulated output voltage in step 7).


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!"#$%&' )%*&"+,'+#- .-/ 01'%*3

Multiple feedback op-amp filters can be used to solve second order differential equations. With

Multiple feedback op-amp filters, we do not need to have many resistors, inverting, summing,

integrator, and non-inverting amplifiers. This is important from integrated circuit manufacturing

point.

At the end of this project, you will be able to:

1. Design solutions for electrical engineering problems2. Utilize PSPICE and MATLAB to analyze and design electronic circuits

3. Apply teaming skills

4. Use written communications to document work and present design results.

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ele341 project opamp

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