Invention Grant
- Patent Title: Inductive evaluation of the coupling factor of an electromagnetic transponder
- Patent Title (中): 电磁应答器耦合因子的感应评估
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Application No.: US12815681Application Date: 2010-06-15
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Publication No.: US08395485B2Publication Date: 2013-03-12
- Inventor: Luc Wuidart
- Applicant: Luc Wuidart
- Applicant Address: FR Roussey
- Assignee: STMicroelectronics (Rousset) SAS
- Current Assignee: STMicroelectronics (Rousset) SAS
- Current Assignee Address: FR Roussey
- Agency: Wolf, Greenfield & Sacks, P.C.
- Priority: FR0954147 20090619
- Main IPC: H04Q5/22
- IPC: H04Q5/22 ; G08B13/14 ; H04B5/00 ; H04B1/04 ; H01Q11/12
Abstract:
A method for evaluating the current coupling factor between an electromagnetic transponder and a terminal, wherein a ratio between data representative of a voltage across an oscillating circuit of the transponder and obtained for two pairs of inductive and capacitive values of this oscillating circuit is compared with one or several thresholds, the two pairs of values preserving a tuning of the oscillating circuit to a same frequency.
Public/Granted literature
- US20100321164A1 INDUCTIVE EVALUATION OF THE COUPLING FACTOR OF AN ELECTROMAGNETIC TRANSPONDER Public/Granted day:2010-12-23
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