Multistage OTA: Stability and Compensation

This lecture covers the comparison between single and multistage OpAmps, discussing gain boosting techniques like cascode and folded-cascode, low swing considerations, compensation networks, and stability techniques. It delves into the design of two-stage Op-Amps for wide swing, emphasizing the importance of compensation for stability and frequency response. The lecture also explores AC behavior models, frequency compensation objectives, and Miller compensation techniques for stability enhancement, including the analysis of positive and negative zeros. The instructor explains the impact of positive zeros on stability and presents solutions to mitigate their effects, such as feedforward cut and pole-zero cancellation techniques.