Feedback and Stability: General Structure and Analysis

This lecture covers the fundamental concepts of feedback and stability in amplifier design. It starts by explaining the basic principles of negative feedback and its advantages, such as desensitizing gain, reducing distortion, and controlling noise. The lecture then delves into the general feedback structure, including signal-flow diagrams and closed-loop gain calculations. It further explores the loop gain, its significance, and how it affects amplifier performance. The systematic analysis of feedback voltage amplifiers is discussed, focusing on input and output resistances, as well as the impact of loading effects. Practical examples, like the noninverting amplifier, are used to illustrate the concepts and analysis methods.