Passivity, Stability and Circle Criterion

This lecture covers the concepts of passivity, stability, and the circle criterion in the context of control systems. It explains how to transform an input signal in a specific sector, the associated input-output operators, and the realization of transfer functions. The lecture also discusses the realization of loops and closures, as well as the importance of passive systems in control theory. It delves into the mathematical expressions related to passivity, stability, and angle criteria, providing insights into system behavior and design considerations.