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. 03, 2012
Filed:
Sep. 15, 2008
Applicants:
Peter Fasshauer, Neubiberg, DE;
Hans Schwaiger, Munich, DE;
Inventors:
Peter Fasshauer, Neubiberg, DE;
Hans Schwaiger, Munich, DE;
Assignee:
Ident Technology AG, Wessling, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 27/00 (2006.01); G01R 27/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A circuit for generating an indicative signal regarding the approach of an object to an observation area has a send electrode device, a generator circuit for supplying alternating voltage to the send electrode device, a receive electrode device which extends in or along the observation area, and an output circuit for generating an output signal correlating with the field at the receive electrode device. A compensation circuit is provided to add a compensation current ito a signal current iflowing from the receive electrode device.