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:
Jan. 18, 2022
Filed:
Dec. 04, 2019
Applicant:
Stmicroelectronics Razvoj Polprevodnikov D.o.o., Ljubljana, SI;
Inventors:
Jernej Rozman, Ravne Na Koroskem, SI;
Tilen Svete, Preserje, SI;
Assignee:
STMICROELECTRONICS RAZVOJ POLPREVODNIKOV D.O.O., Ljubljana, SI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 5/00 (2006.01);
U.S. Cl.
CPC ...
H04B 5/0062 (2013.01); H04B 5/0068 (2013.01);
Abstract
A circuit includes an in-phase/quadrature down converter configured to be coupled to an antenna of a first NFC (near field communication) device. DC cancellation circuitry is coupled at outputs of the converter. Detection circuitry is configured to analyze DC signals output by the DC cancellation circuits to detect the presence of a second NFC device.