How to determine the type of feedback in the ciruit?

Discussion in 'General Electronics Chat' started by PranjalIES, Jun 28, 2016.

  1. PranjalIES

    Thread Starter New Member

    Jun 28, 2016
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    How to determine the type of feedback in the ciruit?
     
  2. EM Fields

    Member

    Jun 8, 2016
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    Regeneative exalts the input, while degenative attenuates it.
     
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  3. crutschow

    Expert

    Mar 14, 2008
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    If the feedback back to the input is in-phase with the input, the feedback is positive, and if it's out-of-phase, the feedback is negative.
     
  4. AnalogKid

    Distinguished Member

    Aug 1, 2013
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    On the lecture circuit, feedback usually is in the form of a questionnaire.

    ak
     
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  5. crutschow

    Expert

    Mar 14, 2008
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    And it looks like some of the feedback you are getting is of the tongue-in-cheek variety. :rolleyes:
     
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  6. #12

    Expert

    Nov 30, 2010
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    Feedback is the title of the last Forum on the Forums page.:D

    But seriously, most circuits with feedback use negative feedback. It controls gain, and controls gain across frequency ranges. Negative feedback diminishes distortion (if you do it right). The usual way to design is with more than enough gain and then control how much gain with negative feedback. In the other direction is oscillators. They use positive feedback. I've built a few unintentional oscillators myself.:p Another place for positive feedback is called hysteresis. You can change the switching point voltage of a comparator with positive feedback, but not turn it into an oscillator.
     
  7. ScottWang

    Moderator

    Aug 23, 2012
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    If you try to ask a EE question, please name a practical circuit or attach a circuit, it is more easy to discuss, otherwise that is just like using your hand to catch the wind.
     
  8. AnalogKid

    Distinguished Member

    Aug 1, 2013
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    Quoting Donovan? Really?

    ak
     
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