From: phil_a@tpg.com.au   
      
   "Paul G."   
   >   
   >   
   >  To conclude from Baxnadall's paper:   
   > 1- feedback doesn't create distortion where there wasn't already some.   
   > 2- new harmonics are created from existing 2nd harmonic   
   > 3- the new harmonics are much smaller than each preceding harmonic   
   > 4- they are smaller by roughly the 2nd harmonic distortion figure   
   > 5- the effect is more pronounced in bipolar junction transistors than   
   > FETs   
   > 6- reducing 2nd harmonic (ie, push-pull) will nearly eliminate the   
   > effect   
      
      
   ** Another way of summing up the article is to conclude that NFB should be   
   applied around an *amplifier stage* free of gross amplitude non-linearity   
   and with sufficient excess gain to obtain the result needed.   
      
   A square law mixer is simply not an amplifier.   
      
   Which is stating the bleeding obvious  -  really.   
      
   This article, from my friend Rod, covers the same territory and is worth a   
   read:   
      
   http://sound.westhost.com/articles/distortion+fb.htm   
      
      
      
   ....  Phil   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)