Integrated circuit for measuring the distance

Details Integrated circuit for measuring the distance Integrated circuit for measuring the distance

1998-02-13

1999-09-07

Mis, David

Oscillators

With device responsive to external physical condition

331 68, 331 74, 331 96, 331117D, 331108D, 324236, 324327, 32420716, 345179, H03B 518, G01V 311, G01N 2700

Patent

active

059492937

ABSTRACT:
An integrated circuit for measuring the distance houses an oscillator in a package. Further, a plane inductor is provided on the surface of the package housing the oscillator. The plane inductor is connected to the oscillator so as to specify a frequency of the oscillator. If conductive material approaches the surface of the package, the frequency of the oscillator is varied by means of the plane inductor. The approaching distance of the conductive material is detected by detecting the frequency of the oscillator. The conductive material is mostly metal, however, the integrated circuit for measuring the distance can measure the approaching distance of non-metal conductive material such as conductive liquid.

REFERENCES:
patent: 4042876 (1977-08-01), Visioli, Jr.

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