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    71.
    发明专利
    未知

    公开(公告)号：DE60040113D1

    公开(公告)日：2008-10-16

    申请号：DE60040113

    申请日：2000-04-06

    Applicant: ST MICROELECTRONICS SA

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

    IPC: G01S13/74 ,  G06K19/07 ,  G06K7/00 ,  H04B1/59 ,  H04B5/02

    Abstract: The coupling between transponder and terminal is reduced by altering the resonant frequency of either the terminal or transponder coupling circuits when the two are in close proximity. When the coupling is reduced, the data rate for the communication between terminal and transponder is automatically increased, which can be achieved because the coupling is effectively a transformer coupling.

    73.
    发明专利
    未知

    公开(公告)号：AT399348T

    公开(公告)日：2008-07-15

    申请号：AT03718862

    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.

    74.
    发明专利
    未知

    公开(公告)号：DE69936439T2

    公开(公告)日：2008-03-13

    申请号：DE69936439

    申请日：1999-12-20

    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

    75.
    发明专利
    未知

    公开(公告)号：DE60033882T2

    公开(公告)日：2008-01-17

    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.

    76.
    发明专利
    未知

    公开(公告)号：DE60220975D1

    公开(公告)日：2007-08-16

    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.

    78.
    发明专利
    未知

    公开(公告)号：DE69835328D1

    公开(公告)日：2006-09-07

    申请号：DE69835328

    申请日：1998-11-20

    Applicant: ST MICROELECTRONICS SA

    Inventor： WUIDART LUC ,  BARDOUILLET MICHEL

    IPC: H05B41/28 ,  H02M5/293 ,  H05B41/18 ,  H05B41/392

    Abstract: The fluorescent lamp (T) has a bridge rectifier (10) for the incoming low frequency mains supply. The rectifier output (11, 12) is bridged by a switch (M) driven at high frequency to provide a chopped current. Inductors (40, 41) are connected in series in two arms of the bridge and are connected by a switch (36, 37, 38) to form an energy recovery circuit.

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