Content deleted Content added
m remove Erik9bot category,outdated, tag and general fixes |
No edit summary |
||
Line 1:
{{Unreferenced stub|auto=yes|date=December 2009}}
{{Otheruses2|AFC}}
'''Automatic Frequency Control''' (AFC), also called "Automatic Find Channelf", is a method (or device) to automatically maintain a [[Tuner (electronics)|tuning]] of [[electromagnetic radiation]] (radio or [[microwave]]) signal to desired [[frequency]].
Assuming that a receiver is nearly tuned to the desired frequency, a [[electrical network|circuit]] in the receiver develops an error [[voltage]] proportional to the degree to which the receiver is mistuned. This error voltage is then fed back to the tuning circuit in such a way that the tuning error is reduced. In most [[frequency modulation]] (FM) detectors an error voltage of this type is easily available. See [[Negative feedback]].
| |||