CONTACTLESS COMMUNICATIONS METHOD BASED ON ASYNCHRONOUS MODULATIONS AND DEMODULATIONS - Archive ouverte HAL
Brevet Année : 2006

CONTACTLESS COMMUNICATIONS METHOD BASED ON ASYNCHRONOUS MODULATIONS AND DEMODULATIONS

Résumé

The invention relates to a method for exchanging information by inductive coupling or without contact between a reader (2) and a transponder (4), comprising a number of demodulation steps, by the transponder, of a transmission signal coming from the reader, each demodulation step being associated with: a detection of a jump of a parameter of the transmission signal, of a first state to a second state among a set of stable states that the parameter of the transmission signal is capable of adopting; a comparison of the magnitude of the jump and/or of the direction of the jump, at one or more predetermined threshold values; an association with the magnitude of the jump and/or with the direction of the jump, at a value independent of the first state, and; a detection of a stabilization at the second state before another demodulation. The invention also relates to a device for carrying out said method.

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Dates et versions

hal-00367229 , version 1 (10-03-2009)

Identifiants

  • HAL Id : hal-00367229 , version 1

Citer

E. Beigne, D. Caucheteux, E. Crochon, Marc Renaudin. CONTACTLESS COMMUNICATIONS METHOD BASED ON ASYNCHRONOUS MODULATIONS AND DEMODULATIONS. France, Patent n° : WO2006108986. 2006. ⟨hal-00367229⟩
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