Op Am Panalog DeviceAN-A The Monolithic Operational Amplifier: A Tutorial Study
OPERATIONAL AMPLIFIER (OP-AMP)****
Transcript of OPERATIONAL AMPLIFIER (OP-AMP)****
Presented by:
Anamika
OPERATIONAL AMPLIFIER
1. INTRODUCTION 2. AMPLIFIER 3.WHAT IS OP AMP 4. CIRCUIT SYMBOL 5.OP-AMP PICTURES 6.PIN DIAGRAM 7. BLOCK DIAGRAM 8. IMPORTANT TERMS AND EQUATIONS 9. IDEAL OP AMP 10. VOLTAGE TRASFER CHARACTERSTICS 11. APPLICATIONS 12. ADVANTAGES AND DISADVANTAGES 13.CONCLUSION
TOUR GUIDE
INTRODUCTIONThe term “operational amplifier” denotes a special type of amplifier of amplifier that, by proper selection of its externalcomponents, could be configured for a variety of operations.
HISTORY First developed by John R. Ragazzine in 1947In 1960 at FAIRCHILD SEMICONDUCTOR CORPORATION, Robert Widlor fabricated op-amp with the help of IC fabrication technology.In 1968 FAIRCHILD introduces the op-amp that was to become the industry standard.
AMPLIFIER
Virtual Ground
WHAT IS OP-AMP 1) DC-coupled high gain amplifier
2) Output voltage is proportional to the difference of two input voltage
3) It performs arithmetic operation
CIRCUIT SYMBOL
Op-amp pictures
IC- 627
IC-741
OP-AMP PIN DIAGRAM
FIG: IC-741
PIN 1: Offset Null
PIN 2: Inverting input terminal
Pin 3: Non-Inverting input terminal
Pin 4: -VCC
Pin 5: Offset Null
Pin 6: Output
Pin 7: +VCC
Pin 8: NC (no connection)
BLOCK DIAGRAM OF OP-AMP
INPUT STAGE
INTERMEDIATESTAGE
LEVELSHIFTINGCIRCUIT
OUTPUT STAGE
Non-InvertingI/P
InvertingI/P
OUTPUT
Input Stage
Intermediate Stage
Level Transistor/ Shifting Stage
Output Stage
Important terms & equation
IDEAL OP-AMPIdeal OP-AMP characters
1) Infinite input impedance2) Zero output impedance3) Infinite bandwidth4) Infinite open-loop gain5) Infinite CMRR
VOLTAGE TRANSFER CHARACTERISTICS
applications1. ADDER
2. SUBTRACTOR
Vout=(V2-V1) ; If R1=R2=R3=R4
3. DIFFERENTIATOR
4. INTGRETER
MORE APPLICATIONS
Voltage Follower
Comparator
ADVANTAGES & DISADVANTAGES
ADVANTAGES
1) It has high reliability ,2) Small in size, 3) Cheap in cost,4) Low power consumption, 5) It can performs arithmetic
operation,6) It can be used as filter, oscillator etc.
DISADVANTAGES
1) Designed for lower power operation,
2) Shuts off when the load resistance is below a certain level etc.
CONCLUSION Op-Amps are often used for
Sensor amplification Mathematical operations (sums, difference, inverse) Filters (High/Low/Band pass) Measurement devices
Current in –> Voltage out