センサ・コイルを持つ非線形素子の発振器における発振機構の挙動

Abstract

The relaxation oscillations, which would always occur in the oscillators using nonlinear elements such as ESAKI-diode (E.D) and U.J.T, is basically important in studying the oscillating mechanisms so that there have been many research reports in this field in this past. However, in those research papers, the researchers have rather intended to escape that they have utilized inductors as an element in the relaxation oscillators if possible, because the oscillators that have inductors as the elements of the oscillator's circuits have great tendency to increase the distortion of the output waveforms and/or to decrease the degree of the stabilities in oscillation. In this paper, we will rather intend to challenge to study the relaxation oscillator having sensor coils, that are a kind of inductors, as nonlinear elements, because we have purposes of detecting the positions and displacements of bodies at the proximity of the sensing coil. As a result, in the paper, we will report that the outputs in those oscillator's output waves would take the forms of P.W.M (in the case of E.D circuits) or P.N.M (in the case of U.J.T circuits) according to the distance between the sensor and the bodies at the proximity.