1. Operational amplifier
PREPARED BY
V.Thamizharasan,AP/ECE
Erode Sengunthar Engineering College

2. Basic information of op-amp
Op-amp is a direct coupled high gain amplifier
Used to amplify dc and ac input signals
To perform mathematical operation
It can be used as active filters, amplifiers, oscillators, comparators, regulators and etc.
Symbol of op-amp:
Non inverting input terminal
Output terminal
Inverting input terminal

3. Packages Metal can (TO) package The dual in line package(DIP)
Flat package or flat pack

4. Dual in line welded seal ceramic package
Cont.,
ceramic flat package
To-5 style package with straight leads.
dual in line plastic package
Dual in line welded seal ceramic package

5. Power supply connection

6. Manufacturers for linear ICs

7. 741 versions

8. Equivalent circuit of op-amp

9. Ideal/Practical characteristics of op-amp

10. Features of op-amp 741
No external frequency compensation(internally frequency compensated)
Short circuit protection
Offset-null capability
Large common mode and differential mode voltage range three different packages
Available various operating temperature ranges
Low power consumption
No latch up problem

11. General operational amplifier stages
1 & 2 stages provide high gain and high input resistance
3buffer and level shifter provide high input impedance and adjust d.c voltage.
4provide low output impedance

12. Basic differential amplifier
Suppress any undesired noise signal
CMRRbetter for high
4 different configuration
1.Differential input and differential output (or)
Dual innput and balanced output
2.Differential input and signle ended output
3.Sigle input ,differential output
4.Single input single ended output.
Mode of operation:
1.Common mode operation
2.Differential mode operation

13. Cont.,

14. Cont.,

15. Differential input signal applied

16. Improvement of CMRR

17. Internal circuit diagram of UA 741 op-amp

18. Motorola MC1530 op-amp