web enotes



Feedback is used to reduce the error between the reference input and the system output. Feedback also has effects on such system performance characteristics as stability, bandwidth, overall gain, impedance, and sensitivity. Feedback affects the gain G of a non-feedback system by a factor of 1 + GH.

The system of Fig. given below is said to have negative feedback because a minus sign is assigned to the feedback signal. The quantity GH may itself include a minus sign, so the general effect of feedback is that it may increase or decrease the gain G. In a practical control system, G and H are functions of frequency, so the magnitude of 1 – GH may be greater than 1 in one frequency range but less than 1 in another. Therefore, feedback could increase the gain of the system in one frequency range but decrease it in another. Feedback may increase the gain of a system in one frequency range but decrease it in another.

Related Topic – click here
What Is A Diode? Working Principle & Types | Different Types Of Resistors
What Is Synchronous Speed? | Types & Advantages Of DC Motors
Working Principle Of Linear Variable Differential Transformer | Construction & Piezoelectric Transducers
Three-Phase Induction Motor | 3-Phase Induction Motor Principle
Introduction To Electrical Transformer | Definition, Construction & Parts Of  A Transformer | Types Of Transformers
DC Generator | Principle Of Operation, Construction, Types Of Generators & Application
What Is DC Motor? | Principle Of DC Motor & Types Of DC Motors
Diode-Circuits |Diode Convention, Transformer Rectifier & Objective Questions With Answer

Aanchal Gupta

Welcome to my website! I'm Aanchal Gupta, an expert in Electrical Technology, and I'm excited to share my knowledge and insights with you. With a strong educational background and practical experience, I aim to provide valuable information and solutions related to the field of electrical engineering. I hold a Bachelor of Engineering (BE) degree in Electrical Engineering, which has equipped me with a solid foundation in the principles and applications of electrical technology. Throughout my academic journey, I focused on developing a deep understanding of various electrical systems, circuits, and power distribution networks.

Leave a Reply