Hello all,

I'm trying to detect the frequency of an oscillating cantilever. I've
found a couple of possible methods whereby the end of the cantilever
and a conductor under the cantilever combine to create a capacitor.

As the cantilever oscillates the capacitance will oscillate in
magnitude, with a particular frequency, that of the resonant frequency
of the cantilever.

The problem I'm having is finding a circuit that will use this varying
capacitor and produce a signal of a decaying sinusoidal wave with a
particular frequency; again equal to that of the cantilever.

Any help would be greatly appreciated on this matter.

Many thanks in advance,

Frank