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. 17, 2019
Filed:
Nov. 14, 2017
Applicant:
Nxp B.v., Eindhoven, NL;
Inventors:
Gernot Hueber, Linz, AT;
Ian Thomas Macnamara, Graz, AT;
Assignee:
NXP B.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 5/00 (2006.01); G06K 7/10 (2006.01);
U.S. Cl.
CPC ...
H04B 5/0062 (2013.01); G06K 7/10297 (2013.01); G06K 7/10316 (2013.01); H04B 5/0043 (2013.01);
Abstract
A near field communication (NFC) reader is disclosed. The NFC reader includes an antenna front-end that includes a low pass filter, a matching circuit and an antenna coil. The NFC reader also includes a NFC controller. The NFC controller includes an oscillator coupled to the antenna front-end and the NFC controller is configured to detect a presence of an object in proximity of the antenna front-end using one or more changes in an output of the oscillator. The antenna front-end creates a tank circuit for the oscillator.