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    51.
    发明专利
    未知

    公开(公告)号：FR2792132B1

    公开(公告)日：2001-11-02

    申请号：FR9904544

    申请日：1999-04-07

    Applicant: ST MICROELECTRONICS SA

    Inventor： WUIDART LUC ,  BARDOUILLET MICHEL ,  ENGUENT JEAN PIERRE

    IPC: G06K19/07 ,  G06K7/00 ,  G06K17/00 ,  H02J17/00 ,  H04B1/59 ,  H04B5/02 ,  H04B7/14

    Abstract: The terminal (1) uses inductive coupling to read from and write to a transponder, and includes a resonant circuit (Li,Ci) tuned to receive an AC HF excitation voltage. The resonant frequency may be altered so as to detune the LC in the event that a transponder is very close to the terminal. A capacitor (24) may be controlled by a control circuit (21) and with impedance (Li) to detect a gap of phase in relation to the signal of REF reference and to modify the capacity Ci of the capacitor (24). An Independent claim is included for a contactless system of data transmission.

    52.
    发明专利
    未知

    公开(公告)号：FR2787655B1

    公开(公告)日：2001-03-09

    申请号：FR9816383

    申请日：1998-12-21

    Applicant: ST MICROELECTRONICS SA

    Inventor： WUIDART LUC ,  BARDOUILLET MICHEL

    IPC: G01S13/78 ,  G06K19/07 ,  H04B1/59 ,  H04B5/02

    Abstract: The transponder is of the type having an oscillating circuit (L2,C2) in front of a rectifier circuit (13) designed to produce a continuous voltage (Va) to an electronic circuit (17). The circuit (17) includes means for emitting digital data codes. The transponder has two capacitive modulation circuits (C2,K1; C4,K2) respectively associated with each end terminal of an inductive part (L2) of the oscillating circuit. A reference terminal of each modulating circuit is connected to a reference voltage (15) of the electronic circuit supply

    55.
    发明专利
    未知

    公开(公告)号：DE60137382D1

    公开(公告)日：2009-03-05

    申请号：DE60137382

    申请日：2001-05-16

    Applicant: ST MICROELECTRONICS SA

    Inventor： WUIDART LUC ,  BARDOUILLET MICHEL

    IPC: G06K7/00 ,  G06K7/08 ,  G06K7/10

    Abstract: A device for generating an electromagnetic field by a first oscillating circuit excited by a high-frequency signal, including, at a distance from the first oscillating circuit, a second passive, unloaded and coreless oscillating circuit, forming an element for concentrating the magnetic flux intended to be intercepted by a transponder by a third oscillating circuit.

    56.
    发明专利
    未知

    公开(公告)号：DE60321770D1

    公开(公告)日：2008-08-07

    申请号：DE60321770

    申请日：2003-02-11

    Applicant: ST MICROELECTRONICS SA

    Inventor： WUIDART LUC ,  BARDOUILLET MICHEL

    IPC: G06K19/07 ,  G06K19/067 ,  G06K19/077 ,  G11C11/56 ,  G11C17/14 ,  H04B1/59 ,  H04B5/02

    Abstract: An electromagnetic transponder including: a parallel oscillating circuit adapted to extracting a supply signal from a radiated field; in parallel with the oscillating circuit, several branches each including a programmable resistor and a switch; and a cyclic control element for successively turning on the switches, each resistor forming an element for storing a portion of the code stored in the transponder.

    58.
    发明专利
    未知

    公开(公告)号：DE60220975T2

    公开(公告)日：2008-03-13

    申请号：DE60220975

    申请日：2002-09-03

    Applicant: ST MICROELECTRONICS SA

    Inventor： WUIDART SYLVIE ,  WUIDART LUC ,  BARDOUILLET MICHEL ,  BALLTHAZAR PIERRE

    IPC: G01K7/00 ,  G06K19/073 ,  G06F12/14 ,  G06F13/42 ,  G06F21/06 ,  H01L21/822 ,  H01L27/04

    Abstract: Method for detection of variations of an evironmental parameter (V,T) in an integrated circuit (1): (a) evaluate a propagation delay for retarding parts (21) sensitive to variations parameters environment, and; compare the delay current with respect to a reference value (REF). The measured delay current is compared to two predetermined minimum and maximum levels or a unique reference value defining a authorized operating range for the integrated circuit. The value from programmable retarder is determined as a function of the difference between the current value and reference value. The range of possible variation being predetermined.

    59.
    发明专利
    未知

    公开(公告)号：DE60033882D1

    公开(公告)日：2007-04-26

    申请号：DE60033882

    申请日：2000-04-06

    Applicant: ST MICROELECTRONICS SA

    Inventor： WUIDART LUC ,  BARDOUILLET MICHEL ,  ENGUENT JEAN-PIERRE

    IPC: G06K7/00 ,  G06K19/07 ,  G06K17/00 ,  H02J17/00 ,  H04B1/59 ,  H04B5/02

    Abstract: The terminal (1) uses inductive coupling to read from and write to a transponder, and includes a resonant circuit (Li,Ci) tuned to receive an AC HF excitation voltage. The resonant frequency may be altered so as to detune the LC in the event that a transponder is very close to the terminal. A capacitor (24) may be controlled by a control circuit (21) and with impedance (Li) to detect a gap of phase in relation to the signal of REF reference and to modify the capacity Ci of the capacitor (24). An Independent claim is included for a contactless system of data transmission.

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