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:
Feb. 23, 2010
Filed:
Dec. 13, 2005
Bruno Charrat, Aix en Provence, FR;
Michael Martin, Rognes, FR;
Olivier Carron, Roquevaire, FR;
Inside Contactless, Aix en Provence Cedex, FR;
Abstract
The present invention relates to a method for supplying a power supply voltage (Vccr) to a contactless integrated circuit reader (RD) that is in a passive operating mode, in the presence of an external alternating magnetic field (FLD), the reader comprising an antenna circuit (ACT) substantially tuned to a working frequency (F). According to the present invention, the method comprises the steps of taking off in the antenna circuit (ACT) an alternating voltage (Vcd) induced in the antenna circuit by the external magnetic field (FLD), and rectifying the induced voltage to supply an auxiliary supply voltage (Vccr).