ppt karan gmg14190
TRANSCRIPT
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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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Operational Amplifier
+
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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Operational Amplifier
Inverting Amplifier
(1) Kirchhoff node equation at V+yields,
(2) Kirchhoff node equation at V
yields,
(3) Setting V+ = V 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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Operational Amplifier
Multiple Inputs
(1) Kirchhoff node equation at V+yields,
(2) Kirchhoff node equation at V
yields,
(3) Setting V+ = V 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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Operational Amplifier
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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Operational Amplifier
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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