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26 records (took 0.036 seconds)

    22.
    发明专利
    未知

    公开(公告)号：DE60010200T2

    公开(公告)日：2005-04-21

    申请号：DE60010200

    申请日：2000-10-25

    Applicant: ST MICROELECTRONICS SA

    Inventor： LEBOWSKY FRITZ ,  MARREC SONIA

    IPC: G11B7/09 ,  G11B20/10 ,  G11B7/00 ,  H04L7/033

    Abstract: The incident signal transition detection method has a detection and selection unit (PMC) detecting and selecting the incoming incident sample (HFS). Chains (BLC1-BLC3) of blocks with memory cells (CH10,CH11) each with a time counter (CPT1) are set by a control mechanism (MCT). Each memory cell block is processed (MT) and the time separations stored in the cells (PM).

    24.
    发明专利
    未知

    公开(公告)号：FR2799852B1

    公开(公告)日：2002-01-11

    申请号：FR9912199

    申请日：1999-09-30

    Applicant: ST MICROELECTRONICS SA

    Inventor： LEBOWSKY FRITZ

    IPC: G11B20/14 ,  G06F17/40 ,  G11B20/10 ,  H03K5/19

    Abstract: Procedure in which the base length of the signal (1T) is first determined for an impulse (SMP) signal where all impulses last for a multiple of the base length signal. This is carried out in an initialization phase in which reference values (1T-14T) are determined. A correction procedure is also followed for a current distance and a comparison error is generated. An Independent claim is made for a device for reading binary data from a CD-ROM or a DVD disk.

    25.
    发明专利
    未知

    公开(公告)号：FR2796487A1

    公开(公告)日：2001-01-19

    申请号：FR9908239

    申请日：1999-06-28

    Applicant: ST MICROELECTRONICS SA

    Inventor： MARREC SONIA ,  LEBOWSKY FRITZ

    IPC: G11B7/09 ,  G11B7/135

    Abstract: Procedure using an optical receiver comprising four photo-detectors for four elementary signals. The signals are split into two secondary pairs of signals sampled and filtered by two low pass filters with a cut-off frequency equal to a quarter of the sampling frequency. The phase difference between the two signals is proportional to the positioning error of the laser beam. Determination of the phase difference involves selection of at least two samples (ECHM, ECHm) above or below a threshold amplitude plus or minus TH about a given level (SE). Hence two transitions (ECH12) of the secondary signals with respect to a threshold corresponding to crossing in the same direction of the threshold can be marked. The time scale between the two transitions can be found which then relates to the distance the laser light beam is from its correct path.

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