Feedback | Chapter 11

Описание: In this video, we explore Chapter 11 of Microelectronic Circuits by Sedra and Smith, where the focus shifts to negative feedback in amplifier circuits and why it is one of the most powerful ideas in analog electronics.

This chapter brings together amplifier gain, feedback networks, and system behavior to show how feedback dramatically improves performance—enhancing gain accuracy, linearity, bandwidth, input/output resistance, and robustness to device variations.

Using clear visuals and intuitive explanations enhanced by modern presentation techniques, we walk through how feedback works at a conceptual level, how loop gain governs performance, and why feedback allows real amplifiers to behave predictably despite non-ideal devices.

We examine the four basic feedback topologies and show how each configuration affects gain, input resistance, and output resistance. Along the way, we develop intuition for how feedback trades raw gain for stability, accuracy, and repeatability—a trade-off that underpins nearly all modern analog design.

Rather than focusing on heavy mathematical derivations, the discussion centers on engineering intuition: how designers think about feedback paths, how sensitivity is reduced, how bandwidth is extended, and how feedback shapes real circuit behavior.

This chapter builds essential understanding for op-amp design, control systems, signal conditioning, and integrated circuit design, preparing you for stability analysis, frequency compensation, and advanced feedback-based architectures in later chapters. Whether you’re learning feedback for the first time or revisiting it from a system-design perspective, this video provides a clear and intuitive explanation grounded in real engineering practice.