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Subject: Re: Audio noise in diff amps
Date: 19 Dec 2002 12:19:29 GMT
References: <email@example.com> <firstname.lastname@example.org> <7a9M9.6086$jM5.email@example.com>
User-Agent: tin/1.4.5-20010409 ("One More Nightmare") (UNIX) (CYGWIN_NT-4.0/1.3.17(0.67/3/2) (i686))
Phil Allison wrote:
> ** If you can supply me some of those energy delivering resistors I
> have a few small projects that I can power with them.
Bad news, I'm afraid...I'm only half way there: Sadly those energy
-delivering resistors all also absorbing energy. All the time.
It's what being in thermal equilibrium is all about.
I'd love to hear what you think is inside this clever Fluke meter that
measures noise voltage WITHOUT drawing any current whatsoever. It would
have to be a non-inverting follower with infinite input impedance,
which is rumoured to be a tricky one to construct!
Noise is a form of signal, and to my knowledge, there's yet to be
invented the physics that would allow signal flow without any associated
transference of energy. If you can detect the noise, energy has moved.
> I also need some zero foward drop diodes for the rectifier - any ideas ??
Look up where your sourced your "stasis resistors" from and flick to
the "impossible semiconductors" section of the catalogue.
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