Inductive proximity switch with slight temperature dependency

Details Inductive proximity switch with slight temperature dependency Inductive proximity switch with slight temperature dependency

1991-06-19

1992-06-02

Pascal, Robert J.

Oscillators

With device responsive to external physical condition

331117R, 324327, G01N 2700, H03B 100

Patent

active

051190443

ABSTRACT:
An inductive proximity switch with adjustable switching hysteresis includes a presence indicator having an oscillator with an oscillating circuit and oscillator amplifier, a switch amplifier connected downstream of the presence indicator, an electronic switch controllable by the presence indicator through the switch amplifer, and a demodulator assigned to the oscillator. The presence indicator has an electronic circuit with a temperature dependency compensating for a temperature dependency of the switching point of the inductive proximity switch. The temperature dependency of the switching point of the inductive proximity switch is dictated by the temperature dependency of the quality of the oscillating circuit.

REFERENCES:
patent: 4609882 (1986-09-01), Gehring et al.
patent: 4806882 (1989-02-01), Gehring et al.
patent: 4942372 (1990-07-01), Heimlicher
patent: 4949054 (1990-08-01), Briefer
patent: 5043679 (1991-08-01), Kriz et al.

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