Chapter 6
Feedback and Stability Theory
Abstract
Real-world considerations of op amps involve, among other things, stability. A lot of designers get into trouble by trying to operate an op amp outside of its stable operating region. A review of feedback theory is applied to op amps and used to show how feedback circuits can become unstable. Bode plots are a useful and simple way of visualizing the stable operating region of op amps.
Keywords
Bode plots; Feedback theory; Phase margin; Stability
6.1. Introduction to Feedback Theory
With this chapter, we begin a quest for understanding. There is a specific question that comes up over and over again in interaction with customers and other engineers: “Why can't I make an inverting attenuator by making R ...
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