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  • INTERVIEW QUESTIONS ELECTRONICS AND COMMUNICATION (EC) ENGINEERING DETAILS
    Question :
    Explain advantages of negative feedback over positive feedback.
    Category Electronics and Communication (EC) Engineering Interview Questions
    Rating (0.2) By 266 users
    Added on 6/20/2011
    Views 477
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    Answers:

    Much attention has been given by researchers to negative feedback processes, because negative feedback processes lead systems towards equilibrium states. Positive feedback reinforces a given tendency of a system and can lead a system away from equilibrium states, possibly causing quite unexpected results.
    Example for negative feedback and positive feedback:
    Example for ?ve feedback is Amplifiers.
    Example for +ve feedback is Oscillators



    The big advantage over positive feedback is only gain of nagative feedback is high over it



    Posted by: Yagyang Dwivedi    

    Contact Yagyang Dwivedi Contact Yagyang Dwivedi

    1) -ve F.B. leads to more stable system at the cost of reduction in gain.
    2) it increases the useful bandwidth range.
    3) it reduces the non-linearity (noise, distortion and temperature effects).



    Posted by: Rahul    

    Contact Rahul Contact Rahul

    the negative feedback has more advantages.they are
    1.it has more stability.
    2.it increases the bandwidth.
    3.it reduces the noise.
    but only the disadantage of negative feed back over positive feed back is it decreases the gain.



    Posted by: y.n.gowthami    

    Contact y.n.gowthami Contact y.n.gowthami

    negative feedback gives us goood stability which is required by our system and also increased the bandwidth of the system with decreases the gain.



    Posted by: swaraj negi    

    Contact swaraj negi Contact swaraj negi

    Negative feedbaack is very much stable but it has less gain as compare to Positive Feedback.
    Negative feedback has high Bandwidth capability.
    Less Noise.



    Posted by: Mayur     

    Contact Mayur Contact Mayur

    The negative feedback increses stability and it has more bandwidth than positive feedback.Also negative feedback reduces noise.But negative feedback has less gain than positve feedback.



    Posted by: Kamlesh Srivastava    

    Contact Kamlesh  Srivastava Contact Kamlesh Srivastava

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