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feedback

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feedback


  2  definitions  found 
 
  From  WordNet  r  1.6  [wn]: 
 
  feedback 
  n  1:  the  process  in  which  part  of  the  output  of  a  system  is 
  returned  to  its  input 
  2:  response  to  an  inquiry  or  experiment 
 
  From  The  Free  On-line  Dictionary  of  Computing  (13  Mar  01)  [foldoc]: 
 
  feedback 
 
    Part  of  a  system  output  presented  at  its  input. 
  Feedback  may  be  unintended.  When  used  as  a  design  feature, 
  the  output  is  usually  transformed  by  passive  components  which 
  attenuate  it  in  some  manner;  the  result  is  then  presented  at 
  the  system  input. 
 
  Feedback  is  positive  or  negative,  depending  on  the  sign  with 
  which  a  positive  change  in  the  original  input  reappears  after 
  transformation.  Negative  feedback  was  invented  by  Black  to 
  stabilise  {vacuum  tube}  amplifiers.  The  behaviour  becomes 
  largely  a  function  of  the  feedback  transformation  and  only 
  minimally  a  function  of  factors  such  as  transistor  gain  which 
  are  imperfectly  known 
 
  Positive  feedback  can  lead  to  instability;  it  finds  wide 
  application  in  the  construction  of  oscillators. 
 
  Feedback  can  be  used  to  control  a  system,  as  in  {feedback 
  control}. 
 
  (1996-01-02) 
 
 




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