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:
Nov. 30, 2010
Filed:
Aug. 14, 2006
Wilfried Klopfer, Regensburg, DE;
Wilfried Klopfer, Regensburg, DE;
BSH Bosch und Siemens Hausgeraete GmbH, Munich, DE;
Abstract
A capacitive proximity switch has an electrically conductive sensor surface, which is covered by an electrically non-conductive covering plate and which serves as a part of a capacitor having a capacitance that varies with proximity. The sensor surface is connected to a control input of a semiconductor switch that has a signal input with a clock signal and a signal output. A household appliance is equipped with the capacitive proximity switch. The signal output of the semiconductor switch has an output signal, which follows the clock signal and which has signal portions that are proportional to the capacitance of the capacitor formed with the sensor surface.