Invention Grant
- Patent Title: Evaluation of the coupling factor of an electromagnetic transponder by capacitive detuning
- Patent Title (中): 通过电容失谐评估电磁应答器的耦合因子
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Application No.: US13151622Application Date: 2011-06-02
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Publication No.: US08798533B2Publication Date: 2014-08-05
- Inventor: Luc Wuidart
- Applicant: Luc Wuidart
- Applicant Address: FR Rousset
- Assignee: STMicroelectronics (Rousset) SAS
- Current Assignee: STMicroelectronics (Rousset) SAS
- Current Assignee Address: FR Rousset
- Agency: Wolf, Greenfield & Sacks, P.C.
- Priority: FR1054355 20100603
- Main IPC: H04B5/00
- IPC: H04B5/00
Abstract:
A method for evaluating the current coupling factor between an electromagnetic transponder and a terminal, and a transponder implementing this method, wherein a ratio between data representative of a voltage across an oscillating circuit of the transponder and obtained for two capacitance values of the oscillating circuit is compared with one or several thresholds.
Public/Granted literature
- US20110300800A1 EVALUATION OF THE COUPLING FACTOR OF AN ELECTROMAGNETIC TRANSPONDER BY CAPACITIVE DETUNING Public/Granted day:2011-12-08
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