New type of self-excited oscillator.
Using a novel feedback technique an oscillator generates nonresonant LC oscillations whose frequency increases with increasing damping of the circuit. Applications for contactless measurement of the conductivity, permeability, diameter, and thickness of materials, and displacement measurements are discussed.
Lambeck
M
M
Fachbereich Physik, Sekr. P11, Technische Universitat, D 1000 Berlin 12, Federal Republic of Germany.