The Catch-22 of Negative Feedback aka NFB
Stewart Pinkerton wrote:
On Fri, 24 Mar 2006 17:57:12 +0100, "Ruud Broens"
wrote:
"Stewart Pinkerton" wrote in message
.. .
: On Fri, 24 Mar 2006 12:59:37 +0100, "Ruud Broens"
: wrote:
:
: "Arny Krueger" wrote in message
: ...
: : "Ruud Broens" wrote in message
: :
: :
: : we've been through this 'linearity contest' before, here.
: : whereas you define it in terms of current amplification,
: : i define it in terms of voltage amplification.
: : as real-world interfacing in audio is with *voltages*,
: : doesn't seem unreasonable...
: :
: :
: : Negative feedback is generally used to make amplifiers more linear in the
: : voltage domain. It's a highly sucessful strategy. We sent men to the moon,
: : partially based on amplifiers that were linearized with negative feedback.
: :
: : Where's the beef?
: :
: they 'beef' is, your banana needs 1K more straightening' than my banana -
: why keep claiming it is "superior" ?
:
: Because what matters is the output of the *final* circuit - the banana
: is perfectly straight in the opamp, but your tube circuit is still
: bendy.
yeah, right, as in 0.007 % distortion kinda bendy.
must be what they call 'the scottish bend',
then
Be more specific about the tubed circuit you claim has this level of
distortion.
--
It's there in the RAT thread Hybrid circuit-CQ something or other.
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