ABSTRACT
Perhaps the most common and important power modulators are the various kinds of electronic amplifiers which show up in so many dynamic systems, even those that are mainly mechanical, fluid, or thermal. We want to describe three main types of amplifiers and show how to simulate their behavior in a larger system of which they are a part. As usual, we take the system engineer's viewpoint and give only enough detail to allow basic understanding, definition of measurable parameters, and simulation. We definitely do not explore the design of the amplifiers themselves, a task certainly reserved to electrical engineering specialists.
