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    21.
    发明专利
    未知

    公开(公告)号：FR2819070A1

    公开(公告)日：2002-07-05

    申请号：FR0017261

    申请日：2000-12-28

    Applicant: ST MICROELECTRONICS SA

    Inventor： MARINET FABRICE ,  WUIDART SYLVIE

    IPC: G06F21/55 ,  G06F12/14 ,  G06K19/073

    Abstract: The protection process include detection of the status of a timer (5); controlling the triggering of the timer if the timer is not active; and blocking the device if the timer is active. The timer is de-activated if a predetermined sequence of processes has been executed normally. If this is not the case, a counter is incremented and when this reaches a threshold the data may be protected or erased. The process for protection of an integrated circuit against pirate copying comprises a series of stages executed by the circuit, before a predetermined sequence of processes. The stages include detection of the status of at least one timer (5); controlling the triggering of the timer if the timer is not active; and blocking the device if the timer is active. The integrated circuit executes the process of de-activating the timer, if a predetermined sequence of processes has been executed normally. A further process is activated by the integrated circuit, if the timer is detected to be active; this consists of modifying the value of a counter in a protected non-volatile region of the memory (EEPROM), comparing the value of this counter with a predetermined threshold, and effecting a process of protection of stored confidential data if the counter has attained the threshold value. The protection may be achieved by erasing the confidential data.

    23.
    发明专利
    未知

    公开(公告)号：DE60128608D1

    公开(公告)日：2007-07-12

    申请号：DE60128608

    申请日：2001-01-24

    Applicant: ST MICROELECTRONICS SA

    Inventor： POMET ALAIN ,  MALHERBE ALEXANDRE ,  MARINET FABRICE

    IPC: G06F13/42 ,  G06K19/07

    Abstract: A device for the regeneration of a clock signal from an external serial bus includes a ring oscillator and counter. The ring oscillator provides n phases of a clock signal. Of these n phases, one phase is used as a reference and is applied to the counter. It is thus possible to count the number of entire reference clock signal periods between a first pulse and a second pulse received from the bus. In reading the state of the phases in the oscillator upon reception of the second pulse, a determination is made for a current phase corresponding to the phase delay between the reference clock signal and the second pulse of the bus. By using a regeneration device that also includes a ring oscillator and a counter, it is possible to regenerate the clock signal of the bus with high precision.

    24.
    发明专利
    未知

    公开(公告)号：DE60128314D1

    公开(公告)日：2007-06-21

    申请号：DE60128314

    申请日：2001-11-12

    Applicant: ST MICROELECTRONICS SA

    Inventor： MARINET FABRICE ,  MALHERBE ALEXANDRE

    IPC: H03K3/84 ,  G06F7/58 ,  G06K19/073

    Abstract: Random signal generator comprises an MOS transistor as an electronic noise source. The MOS transistor is operated with a drain source current having a random component and has means for producing a binary random signal from the random drain source current. The current channel is arranged to be curved or S shaped by suitable doping. The invention also relates to an integrated circuit with a binary signal generator based on an MOS transistor. The circuit has suitable connections for connecting to other circuits. An Independent claim is made for a method for generating a random signal from an electronic noise source, in which an MOS transistor with an S or screw shaped channel is used.

    26.
    发明专利
    未知

    公开(公告)号：FR2834064A1

    公开(公告)日：2003-06-27

    申请号：FR0116765

    申请日：2001-12-21

    Applicant: ST MICROELECTRONICS SA

    Inventor： MARINET FABRICE ,  DUVAL BENJAMIN

    IPC: G01K3/00 ,  G01K15/00 ,  G01K13/00 ,  G01K7/00 ,  G01R31/28

    Abstract: Integrated circuit temperature sensor (21) delivers output signals (S1, S2) from means (MC1, CP1; MC1, CP2) for detection of the exceeding of two temperature thresholds. Additional means (MC1, MX1, CP1; MC1, MX2, CP2) are provided for detecting a third and fourth temperature threshold linked to the first and second temperature thresholds respectively such that a deviation in the first or second threshold detection causes a change in the third or fourth. The invention also relates to a corresponding method.

    27.
    发明专利
    未知

    公开(公告)号：FR2806555A1

    公开(公告)日：2001-09-21

    申请号：FR0003458

    申请日：2000-03-17

    Applicant: ST MICROELECTRONICS SA

    Inventor： MARINET FABRICE

    IPC: H03K3/84 ,  H04L9/22 ,  G06F7/58

    Abstract: A pseudo-random number generator includes a first generator for producing a sawtooth waveform signal having a first frequency, and a second generator for producing a pulse signal having a second frequency. A sampling circuit samples the sawtooth waveform signal and the pulse signal for generating a sample signal of the sawtooth waveform signal at the second frequency. A coding circuit codes the amplitude of the sample signal to supply binary values. The pseudo-random number generator has applications in integrated circuits which are used in contact type or contactless IC cards.

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