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    Question :
    What is a feedback? And explain different types of feedback.
    Category Electronics and Communication (EC) Engineering Interview Questions
    Rating (0.2) By 259 users
    Added on 6/18/2011
    Views 531
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    Feedback is a process whereby some proportion of the output signal of a system is passed (fed back) to the input. This is often used to control the dynamic behaviour of the system.
    Types of feedback:
    Negative feedback: This tends to reduce output (but in amplifiers, stabilizes and linearizes operation). Negative feedback feeds part of a system's output, inverted, into the system's input; generally with the result that fluctuations are attenuated.
    Positive feedback: This tends to increase output. Positive feedback, sometimes referred to as "cumulative causation", is a feedback loop system in which the system responds to perturbation (A perturbation means a system, is an alteration of function, induced by external or internal mechanisms) in the same direction as the perturbation. In contrast, a system that responds to the perturbation in the opposite direction is called a negative feedback system.
    Bipolar feedback: which can either increase or decrease output.

    feedback is a process of some part of output is feed in the input that is known as feed back.
    two type of feedback:

    Posted by: anchal verma    

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    feedback is the process in which taking some fraction of output and feed it in input for getting stabilized,noise free output

    Posted by: ravindra satpute    

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    Feedback is the process in which some portion of output inject in the input through resister are of two types : 1)negative feedback
    2)positive feedback

    Posted by: Hariom dubey     

    Contact Hariom dubey Contact Hariom dubey

    Feedback is the injection of output signal to part of the system input.

    It is positive when output signal is fed without inverting its polarity.

    Feedback is negative when output signal is flipped before being added to input

    Posted by: abu    

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    The output signal is connected(fed) to the input signal is called geedback....................They are two types of feedback. 1)Positive feedback 2)Negative feedfack...

    Posted by: A.Mohamed Imran khan    

    Contact A.Mohamed Imran khan Contact A.Mohamed Imran khan

    Feedback: When the some proportion of the output get injected into the input is called feedback.
    Two types of feedback:
    1. Positive feedback- increases output
    2. Negative feedback- decreases output.

    Posted by: Mantu singh    

    Contact Mantu singh Contact Mantu singh

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