The op amp is a common type of chip. It's an analog, general-purpose amplifier configurable to do many different jobs, such as buffering, oscillating and signal filtering by connecting resistors and capacitors to its inputs and outputs.
The chips are marked with part numbers. (e.g LM358)
We can easily find op amps in audio circuits, radio circuits, motor controllers and power supplies.
Non-inverting op-amp
Inverting op-amp
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