- Published in issue 2/1995 on page 64
Operational amplifiers revisited
The operational amplifier (often abbreviated to op amp) is an extremely stable, usually direct-coupled, linear amplifier originally developed for performing mathematical operations. Nowadays, it is widely used in computers, although it is not always realized that this is but one of its many applications. It comes in many shapes with varying specific parameter: one, two or even four in one enclosure.