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    ONE-TIME PROGRAMMABLE MEMORY CELL
    132.
    发明专利
    ONE-TIME PROGRAMMABLE MEMORY CELL 未知

    公开(公告)号：AU2003226880A1

    公开(公告)日：2003-09-04

    申请号：AU2003226880

    申请日：2003-02-11

    Applicant: ST MICROELECTRONICS SA

    Inventor： BARDOUILLET MICHEL ,  RIZZO PIERRE ,  MALHERBE ALEXANDRE ,  WUIDART LUC

    IPC: G06F21/06 ,  G11C16/22 ,  G11C17/14 ,  H01L27/10

    Abstract: The invention relates to a memory cell with a binary value consisting of two parallel branches. Each of said branches comprises: at least one polycrystalline silicon programming resistor (Rp 1 , Rp 2 ), which is connected between a first supply terminal ( 1 ) and a point or terminal for the differential reading ( 4, 6 ) of the memory cell state; and at least one first switch (MNP 1 , MNP 2 ) which, during programming, connects one of said read terminals to a second supply terminal ( 2 ).

    135.
    发明专利
    未知

    公开(公告)号：FR2809251B1

    公开(公告)日：2003-08-15

    申请号：FR0006301

    申请日：2000-05-17

    Applicant: ST MICROELECTRONICS SA

    Inventor： WUIDART LUC ,  BARDOUILLET MICHEL

    IPC: G06K7/00 ,  G06K7/08 ,  G06K7/10 ,  H04B1/59 ,  H04B5/00

    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.

    137.
    发明专利
    未知

    公开(公告)号：FR2808946A1

    公开(公告)日：2001-11-16

    申请号：FR0006071

    申请日：2000-05-12

    Applicant: ST MICROELECTRONICS SA

    Inventor： WUIDART LUC

    IPC: G06K17/00 ,  G01S13/75 ,  G01S13/76 ,  G01S13/79 ,  G06K7/00 ,  H04B1/59 ,  H04B10/22

    Abstract: A method for controlling an electromagnetic field generation terminal using a signal for exciting an oscillating circuit, provided with circuitry for regulating the signal phase in the oscillating circuit, including comparing current values of variables linked to the current in the oscillating circuit and to the voltage thereacross with predetermined values, to detect the presence of a transponder in the electromagnetic field.

    139.
    发明专利
    未知

    公开(公告)号：FR2796781A1

    公开(公告)日：2001-01-26

    申请号：FR9909563

    申请日：1999-07-20

    Applicant: ST MICROELECTRONICS SA

    Inventor： WUIDART LUC ,  ENGUENT JEAN PIERRE

    IPC: G06K7/08 ,  G06K19/07 ,  H04B1/59 ,  H04B5/00

    Abstract: The system comprises a reading-writing terminal with a series oscillator circuit (R1, L1, C1) generating an electromagnetic field, and a transponder containing a parallel oscillator circuit (L2, C2) excited by the field of the terminal. The two oscillator circuits are dimensioned so that the coupling coefficient (k) rapidly decreases when the distance (d) between the transponder and the terminal deviates from a predetermined value. The critical distance value is e.g. 1 cm. The parallel oscillator circuit can contain no capacitor (C2), and the parasitic capacitance of inductor (L2) can have the role of capacitor. The inductance (L2) is maximized, and the capacitance (C2) is minimized. The inductance (L2) is chosen so to satisfy the relation; kopt - (R1L2/R2L1) , where kopt is the value of coupling coefficient giving the maximum voltage (V2max) on poles of parallel oscillator circuit, and R2 is an equivalent resistance of transponder connected in parallel with the inductance (L2). The components of parallel oscillator circuit (L2, C2) are dimensioned starting from a point of functioning at null distance, chosen to correspond to a value of coupling coefficient (k) below the optimum value (kopt) and satisfying the relation: V2max = R2/R1)

    140.
    发明专利
    未知

    公开(公告)号：FR2792132A1

    公开(公告)日：2000-10-13

    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.

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