The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 27, 2021
Filed:
Oct. 25, 2019
Applicant:
Pepperl+fuchs Gmbh, Mannheim, DE;
Inventors:
Assignee:
Pepperl + Fuchs GmbH, Mannheim, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01N 27/00 (2006.01); G08B 19/00 (2006.01); G08B 21/00 (2006.01); G08B 23/00 (2006.01); H03K 17/95 (2006.01); H03K 17/955 (2006.01);
U.S. Cl.
CPC ...
H03K 17/9547 (2013.01); H03K 17/955 (2013.01);
Abstract
An oscillating sensor device, particularly for a proximity sensor, for sensing a dynamic change of attenuation caused by a measurable physical effect includes an oscillator including a resonance circuit and an amplifier fed back to the resonance circuit and configured to maintain oscillation of the oscillator, and a control unit configured to control the open loop gain of the oscillator. The amplifier comprises a non-linear gain characteristics defining an operating point at a preset amplitude of oscillation. The control unit is configured to control the open loop gain of the oscillator so that the operating point is set to a preset amplitude of the oscillation.