[sdiy] Simple discrete Unity-Gain Follower ?

[Don Tillman]

   > Date: Thu, 01 May 2003 11:39:20 -0500
   > From: Grant Richter <grichter at asapnet.net>
   > 
   > Most of the "audiophile" distaste for feedback loops refers to
   > the failure of the feedback loop, not when it's working properly.

Grant, you didn't really mean to say that, did you?  

There are a number of serious problems with feedback loops, even when
they're working properly.  The most blatent is that the output is the
amplifier gain times the error.  That's just philosophically wrong at
a deep fundamental level.

And, of all the truly cherished pieces of audio equipment (hifi amps,
guitar amps, signal processors, etc.) it's really hard to name any
that use large amounts of feedback in the audio chain.  And of all the
truly despised pieces of audio equipment, most use a lot of feedback.
The correlation is pretty significant.

  -- Don

-- 
Don Tillman
Palo Alto, California, USA
don at till.com
http://www.till.com