公开(公告)号：FR2846461A1

公开(公告)日：2004-04-30

申请号：FR0213456

申请日：2002-10-28

Applicant: ST MICROELECTRONICS SA

Inventor： WUIDART LUC

IPC: G01C22/00 ,  G06F7/60 ,  G11C17/08 ,  G06M3/12 ,  G11C17/14 ,  H01L21/326

Abstract: The counter for intervals or brackets is monotonic and implemented in the form of integrated circuits. The counter comprises a standard incremental counter (I), a memory store (2), and means for counting the intervals which include the one-time programmable (OTP) cells (3), a comparator (4) with a threshold, a central processing unit (6) and a memory store (5) containing an interval between two thresholds, or a table of the threshold values. The first counting circuit (I) is for a number of bits corresponding to the size of intervals of the same value, the comparator (4) introduces a predetermined threshold corresponding to the size of intervals, and the second counting circuit (3) is attained. The counting circuit (1) is reset each time the threshold is attained. The number of bits is at most equal to the number of bits of the counter. The counting result is obtained by adding the count of the first counting circuit (1) to the number contained in the second counting circuit (3), or its product with the threshold. The central processing unit (6) controls the programming of cells (3). The one-time programmable cells comprise at least one memory element constituted of a resistor of polycrystalline silicon which is programmable by an irreversible decrease of resistance. The programming is effected by a temporary passage of constraint current which is higher than a current for which the resistance has the maximum value. Each programming cell comprises a resistor of polycrystalline silicon connected between a first supply terminal and a differential read terminal, and at least one programming interrupter connecting the read terminal to a second supply terminal. The programming resistor is in the form of two resistors of polycrystalline silicon of identical size and doping level. The counter also comprises a circuit for decoding the states of programming cells. The counter comprises a set of number (2m-n+1-(m-n+2)) of cells distributed in at least m-n groups of 2p-1 cells, where p is the rank of group and m-n is the number of intervals, and at least m-n-1 parity computing uits. A method (claimed) for controlling the counter (claimed) includes the programming of a cell from a group of lower rank each time the parity computing unit of immediately higher rank detects a parity.

公开(公告)号：DE60101867D1

公开(公告)日：2004-03-04

申请号：DE60101867

申请日：2001-05-11

Applicant: ST MICROELECTRONICS SA

Inventor： WUIDART LUC

IPC: H04B1/59 ,  G06K7/00

公开(公告)号：FR2836749A1

公开(公告)日：2003-09-05

申请号：FR0201644

申请日：2002-02-11

Applicant: ST MICROELECTRONICS SA

Inventor： WUIDART LUC ,  MALHERBE ALEXANDRE ,  BARDOUILLET MICHEL

IPC: G11C16/22 ,  G11C17/14 ,  G11C16/10 ,  G11C17/00

Abstract: The binary memory cell has two parallel branches. Each branch has a polycrystalline silicon programming resistor (Rp1,Rp2) connected to a terminal (1). There is a terminal point for a differential reading (4,6) of the memory state. There are switches (MNP1,MNP2) which during programming connect one of the read terminals to a second terminal (2).

公开(公告)号：FR2804557B1

公开(公告)日：2003-06-27

申请号：FR0001214

申请日：2000-01-31

Applicant: ST MICROELECTRONICS SA

Inventor： WUIDART LUC

IPC: G06K17/00 ,  G01S13/75 ,  G01S13/76 ,  G01S13/79 ,  G06K7/00 ,  H02J17/00 ,  H04B1/59 ,  H04B5/02

Abstract: A terminal for generating an electromagnetic field adapted to cooperating with at least one transponder when the latter enters its field and including an oscillating circuit adapted to receiving a high-frequency A.C. excitation voltage, circuitry for regulating the signal phase in the oscillating circuit with respect to a reference value, circuitry for determining an instantaneous information relative to the magnetic coupling between the transponder and the terminal, and circuitry for adapting the electromagnetic field power according to at least said present information.

公开(公告)号：FR2829603A1

公开(公告)日：2003-03-14

申请号：FR0111718

申请日：2001-09-11

Applicant: ST MICROELECTRONICS SA

Inventor： WUIDART LUC ,  BALTHAZAR PIERRE

IPC: G06F12/14 ,  G06F21/24 ,  G06K19/073 ,  G11B20/00 ,  G06K19/10 ,  H04L9/32

公开(公告)号：FR2823398A1

公开(公告)日：2002-10-11

申请号：FR0104586

申请日：2001-04-04

Applicant: ST MICROELECTRONICS SA

Inventor： LIARDET PIERRE YVAN ,  WUIDART LUC ,  GUETTE FRANCOIS

IPC: G06F12/14 ,  G06F21/73 ,  G06F21/75 ,  G06K17/00 ,  G07F7/10 ,  G07F7/12 ,  G09C1/00 ,  H01L23/544 ,  H01L23/58 ,  H04L9/10 ,  H04L9/32 ,  G06K19/07

Abstract: The invention relates to a method and a circuit for extracting a secret datum (s) from an integrated circuit involved in an authentication procedure by means of an external device that takes account of said secret datum. Said secret datum is generated upon request and made ephemeral.

公开(公告)号：FR2808945B1

公开(公告)日：2002-08-16

申请号：FR0006065

申请日：2000-05-12

Applicant: ST MICROELECTRONICS SA

Inventor： WUIDART LUC

IPC: H04B5/02 ,  G06K7/00 ,  H04B1/59 ,  H04B10/22

Abstract: A terminal for generating a high-frequency electromagnetic field by an oscillating circuit, adapted to cooperating with at least one transponder when the transponder enters this field, and a method for establishing a communication between the devices, including circuitry for regulating the signal phase in the oscillating circuit with respect to a reference value and circuitry for evaluating, based on a measurement of the current in the oscillating circuit, the minimum number of transponders present in the field.

公开(公告)号：FR2808942B1

公开(公告)日：2002-08-16

申请号：FR0006064

申请日：2000-05-12

Applicant: ST MICROELECTRONICS SA

Inventor： WUIDART LUC

IPC: H04B1/59 ,  G06K7/00

Abstract: A terminal for generating an electromagnetic field adapted to communicating with at least one transponder, and a method for controlling such a terminal including: an oscillating circuit adapted to being excited by a remote supply signal of the transponder; a phase demodulator for detecting possible data transmitted by the transponder; circuitry for regulating the signal phase in the terminal's oscillating circuit on a reference value; circuitry for measuring variables linked to the current in the oscillating circuit and to the voltage thereacross; and circuitry for comparing current values of these variables with predetermined values, to determine the presence of a transponder.

公开(公告)号：FR2808942A1

公开(公告)日：2001-11-16

申请号：FR0006064

申请日：2000-05-12

Applicant: ST MICROELECTRONICS SA

Inventor： WUIDART LUC

IPC: H04B1/59 ,  G06K7/00

Abstract: A terminal for generating an electromagnetic field adapted to communicating with at least one transponder, and a method for controlling such a terminal including: an oscillating circuit adapted to being excited by a remote supply signal of the transponder; a phase demodulator for detecting possible data transmitted by the transponder; circuitry for regulating the signal phase in the terminal's oscillating circuit on a reference value; circuitry for measuring variables linked to the current in the oscillating circuit and to the voltage thereacross; and circuitry for comparing current values of these variables with predetermined values, to determine the presence of a transponder.

公开(公告)号：FR2808941A1

公开(公告)日：2001-11-16

申请号：FR0006061

申请日：2000-05-12

Applicant: ST MICROELECTRONICS SA

Inventor： WUIDART LUC

IPC: H04B1/59 ,  G06K7/00

Abstract: The terminal (30) has a variable capacitor (31) loaded by the transponder and forced to the no transponder value when a transponder is detected by comparison of current values with a previously determined reference but data are not received.