How to determine the type of feedback in the ciruit?

 

How to determine the type of feedback in the ciruit?

Regeneative exalts the input, while degenative attenuates it.

 

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.

 

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

ak

 

And it looks like some of the feedback you are getting is of the tongue-in-cheek variety.

 

Feedback is the title of the last Forum on the Forums page.

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. 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.

 

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.

 

Quoting Donovan? Really?

ak