Magnetic Resonance Spectroscopy (MRS)

I'm looking to build a simple feedback type oscillator circuit where the 'XTAL' is a sample of a substance to be located. The idea is to "spike" a vibratory mode to induce a resonance coupling between the sample in the device and samples to be located via electromagnetic coil. This coupling can easily pin-point where the object is trough the signal amplitude intensity. Any Schematics?	by Utopea 3 hours, 25 minutes ago
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