Operational Amplifiers (Op-amps)
Operational amplifiers, or op-amps, are a beautiful thing. They provide relatively high amplification with relatively low noise or distortion, are pretty darn cheap, flexible in their setups and applications, and they’re easy to use. These characteristics make op-amps extremely common in design and in real life.
A type of amplifier that has very high voltage gain, very high input impedance, very low output impedance, and good rejection of common-mode signals.
Electronic Devices : Conventional Current Version, 9th Edition by Thomas L. Floyd
An active circuit element designed to perform mathematical operations of addition, subtraction, multiplication, division, differentiation, and integration.
Fundamentals of Electric Circuits, 5th Edition by Charles K. Alexander and Matthew N. O. Sadiku