Ron, that is an awesome explanation of what is going on. I actually
was able to fix the problem by swapping out the OA2 regulator. It
really settled down. I also had a continuing discussion about how
amplitude effects frequency in non SHO (simple harmonic oscillator)
with a physics professor friend of mine. A damped LC circuit (RLC) is
not a SHO, so if the amplitude of the oscillations change, the
frequency should change as well. This is also reflected as a
resistance term in the resonance equations for a RLC circuit. For
some reason this didn't show up with the FFT of the JFET Clapp I made
in LTSpice. Too much fun :D
Thanks,
Chris Maness
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On Thu, Dec 26, 2013 at 5:03 AM, John Woodgate <jmw@...> wrote:
In message <52BC2285.9070201@...>, dated Thu, 26 Dec 2013,
Winfield Hill <hill@...> writes:
Well, I always say check your model against bench measurements before
placing much reliance on any SPICE results
And vice-versa. I recently traced a difference between simulation and
real life to a fault in real life - a 10 ohm resistor where a 100 ohm
should have been.
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
Nondum ex silvis sumus
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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