6.302 Electronic Feedback Systems - Lecture 01

Massachusetts Institute of Technology
Department of Electrical Engineering

Feedback Systems

Everything needs feedback. You will never design an electronic or an electromechanical system that does not include a feedback loop, either explicitly or implicitly.

Every interface to the real world --- whether you are building a robot arm, a temperature control system, an audio power amp, or an RF synthesizer (the list goes on and on) --- needs to drive some kind of actuator --- a motor, a heater, a power transistor, or an oscillator. To make sure that actuator is doing the right thing, you need to measure the output (its position, its temperature, its voltage, or its frequency) and compare that measurement to what you meant to do. In other words, you need feedback.

Course Content: Introduction to design of feedback systems. Properties and advantages of feedback systems. Time-domain and frequency-domain performance measures. Stability and degree of stability. Root locus method. Nyquist criterion. Frequency-domain design. Compensation techniques. Application to a wide variety of physical systems. Internal and external compensation of operational amplifiers. Modelling and compensation of power coverter systems. Phase lock loops.

Read more: http://web.mit.edu/6.302/www/



Electronic Feedback Systems: James K. Roberge, Professor of Electrical Engineering