[sdiy] Simple discrete Unity-Gain Follower ?

[Tim Ressel]

Yo,

My $0.02(US) worth,

--- Don Tillman <don at till.com> wrote:
>    > 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.

Feedback loops tend to make designers lazy. They will,
in theory, clean up any distortion in your amp. And
when you measure with steady-state signals, it does.

But music is not steady-state. Feedback always has a
delay because you are adjusting what is going to
happen next based on what happened last. This delay is
audible in real-time to the human ear.

Good to excellent designers make their amp designs as
clean as possible without feedback, then add in as
little feedback as possible. Note that DC feedback for
zero-point determination is usually nessessary.

I try to give as many words for $0.02(US) as possible.
I concider it 'value added'.   ;-)

--Tim

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