I think you're right on this Paul, however you're unnecessarily rude as usual.
Anyway I don't think that rectifying the hot resistor noise with a diode breaks 2LoT. Does a photovoltaic cell (which is a diode too) break 2LoT when converting the thermal energy radiated by a 6000°C black body to electricity? In both cases there is a cold source somewhere, not everything is at the temperature of the hot source. Michel ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <vortex-l@eskimo.com> Sent: Wednesday, February 28, 2007 3:14 PM Subject: Re: [Vo]: Quantum Thermodynamics > Nick Palmer wrote: > > Paul wrote:- > > <<You should read about different types of noise --> > > > > http://www.aikenamps.com/ResistorNoise.htm >> > > > > Well, I read this webpage. Maybe you misunderstand. When they say > > > > <<The thermal noise of a resistor is equal to: > > Vt = SQRT(4kTBR) > > > > where: > > > > Vt = the rms noise voltage > > k = Boltzmann's constant > > T = temperature(Kelvin) > > B = noise bandwidth > > R = resistance >> > > > > you are taking this to mean that the noise voltage is generated solely > > by the temperature of the resistor whether or not there is a current > > flow and this is what the equation seems to suggest; however, this is a > > sound engineer's equation, not a physicist's. I think it means that if > > the resistor is ACTUALLY resisting current, then the noise voltage is > > dependent upon temperature and the "shot noise" depends upon the > > current. I put it to you that when there is no current though the > > resistor, there is no electrical noise at all. Still no free lunch. > > > I will bet you ***any*** amount of money you are wrong, that thermal noise > does > indeed generate a voltage noise without applying any external voltage to > generate current. Hopefully that will put an end to this silly conversation. > :-) Any *real* EE or physicists knows for fact thermal noise generates > voltage > noise due to thermal vibrations. > > If you want to see thermal noise then get a low noise amp and connect it to a > large resistor. > > There is free lunch for *intelligent* thinking beings. :-) > > > Regards, > Paul Lowrance >
