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"Aleksandr Timofeev" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > "George Dishman" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > > "Sergey Karavashkin" <[EMAIL PROTECTED]> wrote in message > > news:[EMAIL PROTECTED] > > [snip] > > > > I can hardly judge what Aleksandr means saying the nonlinear > > > transformer necessary, > > > > I believe he was saying that the blackbody spectrum of > > heat radiated by a resistor is not linear but that, > > although true, is not the usual criteria for defining > > a system as non-linear, it is based on the equation > > that defines the motion. > > If the system changes a frequency spectrum of absorbed > electromagnetic radiation, on definition such system is > nonlinear in relation to absorbed electromagnetic radiation. That may be the case in your line of work but not in mine. A "Simple Harmonic Oscillator" is one in which the restoring force is linearly related to the displacement and that relation is what is being described as "linear". > The generator electromagnetic oscillations always is nonlinear > system, since this one converses one sort of energy in other. > For example - resistor. The voltage is what tries to restore the quiescent conditions and is linearly related to the current hence in normal terminology it is linear. > Even the amplifier electromagnetic oscillations almost always > is nonlinear system, since this one imports nonlinear > distortions to a signal. >;o) I know that only too well :-( > Now problem for you: > > how the REVERSIBILITY of the generator in the amplifier > and on the contrary is interlinked to NONLINEARITY of SYSTEM? Sorry Aleksandr, I am not taking any more exams this week, I think I have established my credentials adequately. best regards George
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