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. 21, 2010
Filed:
Mar. 09, 2007
Applicants:
Olaf Roesch, Munich, DE;
Ralf Schledz, Zolling, DE;
Inventors:
Olaf Roesch, Munich, DE;
Ralf Schledz, Zolling, DE;
Assignee:
Infineon Technologies AG, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D 7/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A sensor circuit has a first input terminal, a second input terminal and an output terminal, a capacitive sensor connected between the first input terminal and the output terminal, a field-effect transistor coupled to the output terminal at one of a source and a drain terminal and coupled to the second input terminal at the other one of the source and drain terminals, and a driver implemented to set a potential at a control terminal of the field-effect transistor such that in sensor operation the field-effect transistor is operated in a sub-threshold voltage range.