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:
Dec. 09, 2014
Filed:
Mar. 31, 2009
Applicants:
Walter Kargl, Graz, AT;
Edmund Ehrlich, Graz, AT;
Matthias Emsenhuber, Graz, AT;
Inventors:
Assignee:
Infineon Technologies AG, Neubiberg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 7/00 (2006.01); G06K 7/10 (2006.01); H04B 5/00 (2006.01); G06K 19/07 (2006.01);
U.S. Cl.
CPC ...
H04B 5/0081 (2013.01); G06K 7/10346 (2013.01); G06K 19/0723 (2013.01); G06K 7/10178 (2013.01);
Abstract
A contactless device including a transmission antenna configured to transmit a transmission signal; a pickup antenna configured to detect a field generated by a pickup signal, which comprises a response signal transmitted from another contactless device and the transmission signal; and a cancellation circuit configured to subtract a voltage of the transmission antenna from a voltage of the pickup antenna.