What are Opamps?

Oprational Amplifier ＜What are Opamps and Comparators?＞
Opamps are differential amplifiers that amplify the differential voltage between the positive/negative input pins.
Op Amp/Comparator Circuit Configurations
Generally, opamps are broken up into 3 stages: Input, Gain, and Output.
Types of Operational Amplifier
Op amps can be classified into 3 main types based on the input/output voltage range: Dual Supply, Single Supply, and Rail-to-Rail.
Noise Characteristics (EMI/EMS)
Noise is commonly referred to as EMC, but when used in certain fields it is broken up into two types, EMI and EMS.
Typical Parameters of Opamps ＜Amplification Factor and Voltage Gain＞
When a voltage is supplied to the input of the amplifier circuit it is multiplied by the amplification factor and appears at the output.
Supply Voltage ＜Absolute Maximum Ratings＞
The absolute maximum rated supply voltage is the maximum voltage that can be supplied between the positive supply (VCC) and negative supply (VEE) pins.

Basic