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:
Apr. 04, 2017
Filed:
Feb. 08, 2013
Applicant:
Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v., Munich, DE;
Inventors:
Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01R 27/26 (2006.01); G01D 5/24 (2006.01); H03M 3/00 (2006.01);
U.S. Cl.
CPC ...
G01R 27/2605 (2013.01); G01D 5/24 (2013.01); H03M 3/456 (2013.01); H03M 3/43 (2013.01);
Abstract
A capacity measuring circuit includes a measuring voltage source configured to feed a sinusoidal voltage signal to a first terminal of a capacity to be measured so as to cause a temporal change in a charge stored on the capacity to be measured. The capacity measuring circuit additionally includes a delta-sigma modulator. The delta-sigma modulator is configured to receive a charge from a second terminal of the capacity to be measured and to provide a digital output signal which is dependent on a quantity of the charge received from the capacity to be measured. The capacity measuring circuit may be employed in a sensor system.