Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.

Lecture

Multistage OTA: Stability and Compensation

In course

EE-423: Low power electronics: analog mixed signal design

This course deals with the analyze, design and optimization of CMOS analog circuits, emphasizing low-power solutions required in a broad range of applications (e.g. IoT, wearables, Biosensors ...). Some examples of mixed-signal design are also addressed. ...

Description

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.

This video is available exclusively on Mediaspace for a restricted audience. Please log in to MediaSpace to access it if you have the necessary permissions.

Watch on Mediaspace

Instructor

Adil Koukab

Official source

Related concepts (32)

Frequency compensation

In electronics engineering, frequency compensation is a technique used in amplifiers, and especially in amplifiers employing negative feedback. It usually has two primary goals: To avoid the unintentional creation of positive feedback, which will cause the amplifier to oscillate, and to control overshoot and ringing in the amplifier's step response. It is also used extensively to improve the bandwidth of single pole systems.

Frequency response

In signal processing and electronics, the frequency response of a system is the quantitative measure of the magnitude and phase of the output as a function of input frequency. The frequency response is widely used in the design and analysis of systems, such as audio and control systems, where they simplify mathematical analysis by converting governing differential equations into algebraic equations.

Stability theory

In mathematics, stability theory addresses the stability of solutions of differential equations and of trajectories of dynamical systems under small perturbations of initial conditions. The heat equation, for example, is a stable partial differential equation because small perturbations of initial data lead to small variations in temperature at a later time as a result of the maximum principle. In partial differential equations one may measure the distances between functions using Lp norms or the sup norm, while in differential geometry one may measure the distance between spaces using the Gromov–Hausdorff distance.

Multistage rocket

A multistage rocket or step rocket is a launch vehicle that uses two or more rocket stages, each of which contains its own engines and propellant. A tandem or serial stage is mounted on top of another stage; a parallel stage is attached alongside another stage. The result is effectively two or more rockets stacked on top of or attached next to each other. Two-stage rockets are quite common, but rockets with as many as five separate stages have been successfully launched.

BIBO stability

In signal processing, specifically control theory, bounded-input, bounded-output (BIBO) stability is a form of stability for signals and systems that take inputs. If a system is BIBO stable, then the output will be bounded for every input to the system that is bounded. A signal is bounded if there is a finite value such that the signal magnitude never exceeds , that is For discrete-time signals: For continuous-time signals: For a continuous time linear time-invariant (LTI) system, the condition for BIBO stability is that the impulse response, , be absolutely integrable, i.

Related lectures (32)

System Identification and Stability

Explores system identification, stability criteria, and challenges in stabilizing cameras on moving platforms.

Control Systems: Stability and Gain Analysis

Explores the application of final value theorem and static gain in control systems.

Bode Diagram: Oscillatory System Synthesis

Covers the synthesis of an oscillatory system using the Bode diagram and MATLAB.

Bode Gain-Phase Relationship

Covers the Bode Gain-Phase Relationship and design of lead compensators.

Robustness Metrics