Digital position sensor including L/C sensing oscillator

Details Digital position sensor including L/C sensing oscillator Digital position sensor including L/C sensing oscillator

1979-12-19

1982-01-12

Grimm, Siegfried H.

Oscillators

With device responsive to external physical condition

324327, 331117R, 331167, 331181, G01V 311, H03K 3023

Patent

active

043108075

ABSTRACT:
A position sensing element forms a reactance (inductive or capacitive) in the L/C tuning circuit of an oscillator. The reactance varies as a function of the position of the sensing element relative to a predetermined object. This causes the resonant frequency of the oscillator to vary as a function of the position of the sensing element. The output of the oscillator is squared to provide a square wave signal, the frequency of which is a direct function of the position of the sensing element relative to the predetermined object.

REFERENCES:
patent: 3891918 (1975-06-01), Ellis
patent: 4241317 (1980-12-01), Breitling

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