Ppt Karan Gmg14190

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INDUSTRIAL TRAINING PRESENTATION

MULTI-PURPOSE OP-AMPS

Submitted by: Karan Gogna

College Roll No:14190Electronics and Communication Engineering(IIIrd year)

Dronacharya College of Engineering,Gurgaon

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Presentation Outline

Company Profile

Op-Amps

Single Ended-Input Distortions

Op-Amp Operations

Conclusion References

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Company Profile

The company I did my Summer Training Cum

Internship from GMG Engineers and

Contractors Pvt. Ltd, is a private Electronics

and Electrical based firm that specializes in

Transformers, manufacture of ICs and PCB

Designing. All the various projects undertaken

by the firm aim at power factor improvementtechniques by promoting energy and fuel

conservation.

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MY PROFILE

TRAINEEWork Fields

Op-Amps

PCBs

Transformers Other linear electric circuits

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Op-Amps

Introduction

Types

Applications

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Single-Ended Input

+

Vo

~Vi

+

Vo

~Vi

+ terminal : Source

terminal : Ground

0o phase change

+ terminal : Ground

terminal : Source

180o phase change

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Distortion

Vd

+

Vo

+Vcc=+5V

Vcc=5V0

+5V

5V

The output voltage never excess the DC voltage

supply of the Op-Amp

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Common-Mode Operation

+

Vo

Vi ~

Same voltage source is applied

at both terminals

Ideally, two input are equally

amplified

Output voltage is ideally zerodue to differential voltage is

zero

Practically, a small output

signal can still be measuredNote for differential circuits:

Opposite inputs : highly amplified

Common inputs : slightly amplified

Common-Mode Rejection

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Operational Amplifier

Noninverting Amplifier

(1) Kirchhoff node equation at V+yields,

(2) Kirchhoff node equation at V

yields,

(3) Setting V+ = V yields

or

+VinVo

Ra Rf

iVV

00

f

o

a R

VV

R

V

0

f

oi

a

i

R

VV

R

V

a

f

i

o

R

R

V

V1

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+

vi

Ra

vov-

v+

Rf

+

vi

Ra

vov-

v+

Rf

R2R1

+

vivo

v-

v+

Rf

+

vivo

v-

v+

Rf

R2R1

Noninverting amplifier Noninverting input with voltage divider

i

a

f

o v

RR

R

R

Rv ))(1(

21

2

Voltage follower

io vv

i

a

f

o v

R

Rv )1(

Less than unity gain

io vRR

Rv

21

2

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Inverting Amplifier



yields,


0

V

0_

f

o

a

in

R

VV

R

VV

a

f

in

o

R

R

V

V

Notice: The closed-loop gainVo/Vin is

dependent upon the ratio of two resistors,and is independent of the open-loop gain.

This is caused by the use of feedback

output voltage to subtract from the input

voltage.

+

~

Rf

Ra

VinVo

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Multiple Inputs



yields,


0V

0_

c

c

b

b

a

a

f

o

R

VV

R

VV

R

VV

R

VV

c

aj j

j

f

c

c

b

b

a

afo

R

VR

R

V

R

V

R

VRV

+

Rf

Va

VoRb

Ra

RcVb

Vc

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Inverting IntegratorNow replace resistors Ra and Rfby complex

componentsZa

andZf, respectively,

therefore

Supposing

(i) The feedback component is a capacitor C,

i.e.,

(ii) The input component is a resistor R,Za = R

Therefore, the closed-loop gain (Vo/Vin) become:

where

What happens ifZa = 1/jCwhereas,Zf= R?

Inverting differentiator

in

a

f

o VZ

ZV

CjZf

1

dttvRC

tv io )(1

)(

tjii eVtv

)(

+

~

Zf

Za

VinVo

+

~

R

VinVo

C

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Ref:080114HKN Operational Amplifier

Op-Amp IntegratorExample:

(a) Determine the rate of change

of the output voltage.

(b) Draw the output waveform.

Solution:

+

RVoVi

0+5V

10 k

0.01FC

Vo(max)=10 V

100s

(a) Rate of change of the output voltage

smV/

Fk

V

50

)01.0)(10(

5

RC

V

t

V io

(b) In 100 s, the voltage decrease

VssmV/ 5)100)(50( oV

0

+5V

0-5V

-10V

Vi

Vo

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Op-Amp Differentiator

RCdt

dVv io

+

R

C

Vo

Vi

0to t1 t2

0

to t1 t2

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Conclusion

In the end I would like to conlude by saying

this Summer training cum Internship that I got

to do helped me gain a lot of knowledge and

practical experience as well as exposure invarious conceps in electronics, what I believe

would play a very imperative role in the

subjects and concepts that I will be studying inthe subsequent semester too.

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References

I would like to thank the staff @GMG Engineers and

Contractors for their keen support and guidance in every

milestone of my internship experience.

Following websites were referred for the compilation of

the presentation:-

1. en.wikipedia.org/wiki/Operational_Amplifiers

2. Op-AMP_Guide Vol 2010, 11, 12, 133.https://www.google.co.in/?gws_rd=cr&ei=TN5HUp_BHMqE

rgeh_IHQDg#q=op+amp+ppt&safe=off

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Ppt Karan Gmg14190