Chapter 4 :OP-AMP & IT'S APPLICATIONS.

1. By
Mr. C.R.Shinde
Electrical Engineering Department
Matoshri College of Engineering & Research centre, Nashik

2. Unit 04: Operational Amplifier Applications.
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1. Introduction to Op-Amp
2. Op-Amp as zero crossing detector (ZCD) and comparator.
3. Op-Amp as Schmitt trigger.
4. Op-Amp as V-I and I-V converters.
5. Op-Amp as Instrumentation amplifier.
6. Waveform generation using Op-Amp - sine, square, saw
tooth and triangular generator.

3. Op-Amp as zero crossing detector (ZCD)
and comparator.
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4. zero crossing detector (ZCD)
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Inverted ZCD Non-inverted ZCD
+Vsat for Vd < 0
-V sat for Vd > 0
+Vsat for Vd > 0
-V sat for Vd < 0

5. Inverted ZCD
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+Vsat for Vd < 0
-V sat for Vd > 0

6. Non-inverted ZCD
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+Vsat for Vd > 0
-V sat for Vd < 0
Draw input
output
waveform

7. Application of ZCD
1. Square wave generator
2. In the main supply synchronizing circuit.
3. Microprocessor based triggering circuit for thyristors.
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8. Comparator
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Non-Inverted Comparator Inverted Comparator

9. Non-Inverted Comparator
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+Vsat for Vin > Vref
-V sat for Vin < Vref

10. Inverted Comparator
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+ Vsat for Vin < Vref
- V sat for Vin > Vref

11. Thank you
Mr. C. R. Shinde
Electrical Engineering Department
Matoshri College of Engineering & Research centre, Nashik
If you have any query, ask me anytime on…… … .. . . .
cshinde58@gmail.com
chandrakant.shinde@matoshri.edu.in
9970031353
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