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It is a high gain direct coupled amplifier with very high input impedance and very low impedance

Circuit Symbol Of Operational Amplifer:

The circuit schematic of an operational amplifier is a triangle with two input terminals called as non-inverting (+), inverting (-) terminals.

There are 3 popular packages available. They are : 

  1. Metal in line package
  2. Dual in line package 
  3. Flat package
The typical operational amplifier (op-amp) has 8-terminals, 10-terminals, 14-terminals in DIP/ Flat package.
The following figures show the different IC packages with 8 and 14  respectively:
8- pin mini DIP
14 pin Dual in-line Package

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