AN165 Integrated operational amplifier theory
Integrated operational amplifier theory
The operational amplifier was first introduced in the early 1940s. Primary usage of these vacuum tube forerunners of the ideal gain block was in computational circuits. They were fed back in such a way as to accomplish addition, subtraction, and other mathematical functions. Expensive and extremely bulky, the operational amplifier found limited use until new technology brought about the integrated version, solving both size and cost drawbacks. Volumes upon volumes have been and could be written on the subject of op amps. In the interest of brevity, this application note will cover the basic op amp as it is defined, along with test methods and suggestive applications. Also, included is a basic coverage of the feedback theory from which all configurations can be analyzed.
DEFINITION OF |