Chapter 5
Feedback Amplifiers
5.1 Introduction
In this age of automation, computation and control the feedback concept plays an important role. Suppose you are driving a car, the eyes sense the position and speed of the car. Based on this input, you can modify the input by steering the wheel, apply a brake or accelerate or decelerate the engine. By the feedback, the process of driving the car is controlled.
Suppose you want to control an electric motor that rotates an antenna, the process is called rotating an antenna. And, the controlled variable is the angle of position of the antenna, which is to be sensed, and based on the feedback of angular position; steering the antenna to the desired position can control the motor. Similarly, in the ...
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