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:
Sep. 13, 2016
Filed:
Jan. 03, 2012
Holger Erkens, Düsseldorf, DE;
Holger Erkens, Düsseldorf, DE;
MICROCHIP TECHNOLOGY GERMANY GMBH, Gilching, DE;
Abstract
A capacitive proximity sensor has a first sensor electrode and a second sensor electrode, a signal generator for providing a first and a second electric alternating signal, a first load element which comprises a first and a second electric load, in which the first alternating signal by the first load can be fed to the first sensor electrode and the second alternating signal by the second load to the second sensor electrode, and wherein the electric loads each together with the capacitive load to be measured at the respective sensor electrode form a lowpass filter, and a signal processing device, which is coupled with the first sensor electrode and with the second sensor electrode, and which is adapted to form a first measurement value from the push-pull portion of a first electric parameter tapped at the first sensor electrode and a second electric parameter tapped at the second sensor electrode.