Explore Common Op-Amp (Operational Amplifier) Circuits, Configurations and Schematics. Plus, Find Helpful Resources and Examples. Visit To Learn More.

The op amp — short for operational amplifier — is a packaged differential amplifier. The ideal op amp — which we can’t get — has infinite gain and infinite input impedance.

Andy recommends favorite resources for basic op amp circuits and includes a portion of TI's AN-20. Test your knowledge with our op amp quiz; answer explanations are included.

The differential amplifier uses both op-amp inputs. A voltage divider (R 1 and R 2 ) and an inverting circuit precede the differential amplifier's noninverting circuit.

Design analysis of the K2-W Vacuum Tube Op Amp’s design and operation reveals the mad science that created a commercial revolution in 1950s and 1960s analog computing.

He used this knowledge to design a device called Op Art which generates Spirograph shapes on your oscilloscope using just a handful of op amps.