A short description about Op-Amp. Here you know about all the related contents of op-amp.

1. Operational Amplifiers
Definition
Ideal op-amp
Pin configuration of op-amp
Ideal Voltage Transfer Curve Of
Op-amp
Open Loop Configuration
& Its Type
Differential op-amp
Inverting op-amp
Non-inverting op-amp
Summing op-amp
Integrator
Applications

2. What is an Op-Amp?
An Operational Amplifier (known as an “Op-Amp”) is a
device that is used to amplify a signal using an external
power source.
Op-Amps are generally composed of:
Transistors, Resistors, Capacitors
= + +

3. Ideal Operational Amplifier
Ideal op-amp is characterized by:
1. Infinite open loop gain;A
 
2. Zero output ohms; R 0
 

i
o
3. Infinite input ohms; R
4. Zero output voltage when input is voltage is zero.
5. Infinite CMRR.

4. Operational Amplifiers
The basic op amp with supply voltage included is shown
in the diagram below.
inverting input
noninverting input
output
V-V+
Figure : Basic op amp diagram with supply voltage.

5. Pin configuration of op-amp
A typical one is the eight pin dual package.
The inverting input, pin 2.
The non-inverting input, pin 3.
The output, pin 6.
The positive power supply V+, pin 7.
The positive power supply V-, pin 4.
Fig : Op-amp pin configuration and circuit symbol

6. Ideal versus Real Op-Amps
Parameter Ideal Op-Amp Real Op-Amp
Differential Voltage Gain ∞ 105 - 109
Gain Bandwidth Product (Hz) ∞ 1-20 MHz
Input Resistance (R) ∞ 106 - 1012 Ω
Output Resistance (R) 0 100 - 1000 Ω
Ideal
Real

7. Ideal Voltage Transfer Curve Of Op-amp

Fig: Ideal voltage transfer curve

8. Open Loop Configuration
There are three open loop configuration of op-amp.
They are :
i. Differential Amplifier
ii. Inverting Amplifier
iii. Non-inverting Amplifier

9. Differential Amplifier

A difference amplifier is a device that amplifies the
difference between two inputs but rejects any signals
common to the two inputs.
Fig: The differential amplifier

10. Inverting amplifier
In the inverting amplifier only one input is applied and that
is to the inverting input terminal.
Fig: The inverting amplifier

11. Non-inverting Amplifier
In this configuration, the input is applied to the non-inverting
input terminals, and the inverting terminal is connected with
ground.
It provides a positive voltage gain.
Fig: The non-inverting
amplifier

12. Summing Amplifier

The circuit shows a three-input summing amplifier circuit
which provided a means of algebraically summing three
voltages. Each multiplied by a constant gain factor.
For n inputs we will have, 푽ퟎ = −푹풇 ×
풊
푽풊
푹풊

13. 
푿푪 =
ퟏ
푱푾푪
=
ퟏ
푺푪
Integrator
It is the feedback component used is a capacitor the
resulting connection is called an integrator.
Fig: Integrator

14. Applications of Op-amp
 AC and DC signals application
Digital-to-Analog converters
 Analog computers
Active filters
 Oscillators
Regulators
 Rectifiers
 Clippers etc.

15. Thanks
To
ALL