On 7/19/06, Dave Tweed <pic@dtweed.com> wrote:
>
> Because the gain on the two paths (inverting vs. noninverting) isn't
> anywhere close to being equal.
>
> Isn't that obvious?
>

Ah, not to me.

If you can make the noise at the mic half the noise at the supply
(with judicious selection of R6, perhaps Jinx's trimpot) then the
noise at the output is still half the noise at the supply.  It doesn't
get amplified at all.

Regards,
Mark
markrages@gmail
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