Op Amp History - The Operational Amplifier - From Abstraction to Reality

Welcome to the video series The Operational Amplifier - From Abstraction to Reality.

Operational amplifiers are the workhorse of the analog industry. It is straightforward for the engineer to design circuits by using a set of assumptions about the device, and therefore using simple formulas to calculate the values of the surrounding components. However, in the real world, there are limitations and errors that must be understood. This is where reality sets in.

00:00 Introduction
00:31 Invention of Negative Feedback
03:20 Inherent Gain Variation Fixed By Negative Feedback
04:10 Control Theory Model of Negative Feedback
05:43 Closed Loop Gain
06:38 Throwing Away Gain is CRAZY
07:10 Gain Stabization
09:06 Philbrick K2-W Vacuum Tube Operational Amplifier
11:16 Philbrick K2-W General Specifications
14:15 1st Monolithic Op-Amps
16:45 Today's Availability of Op-Amps is Daunting