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. 19, 2013
Filed:
Apr. 13, 2010
Frank Winkens, Ludwigshafen, DE;
Frank Winkens, Ludwigshafen, DE;
Balluff GmbH, Neuhausen a.d.F., DE;
Abstract
The invention proposes a circuit arrangement for determination of a measuring capacitance (), comprising a reference circuit portion for defined periodic charging and discharging of a predefined reference capacitance (), and a measuring circuit portion for defined periodic charging and discharging of the measuring capacitance () to be determined, and at least one circuit portion () intended to determine at least one value (M) characteristic of the charging time curve of the reference capacitance () and for deriving at least one value (M) characteristic of the charging time curve of the measuring capacitance (), as well as a circuit portion () for comparing the at least one value (M) characteristic of the charging time curve of the reference capacitance () with the at least one value (M) characteristic of the charging time curve of the measuring capacitance (), and for deriving from that comparison the value of the measuring capacitance ().