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    11.
    发明专利
    未知

    公开(公告)号：DE69823776D1

    公开(公告)日：2004-06-17

    申请号：DE69823776

    申请日：1998-11-17

    Applicant: ST MICROELECTRONICS SA

    Inventor： ENGUENT JEAN-PIERRE

    IPC: H01Q1/38 ,  G06K7/08 ,  G06K19/077 ,  H01Q7/00

    Abstract: Both antenna coil and screen are fitted to opposite sides of an insulating sheet. The coil (30) includes a flat winding (31) of a set shape. A conducting screen (35), of a similar shape to the winding, is arranged with respect to it. The screen has a cut zone (36) so that the screen forms an open loop circuit. Both the screen and the winding may be of rectangular or annular shape. The winding is contained on one face of an insulating sheet and the screen is on the other face of the sheet within its thickness.

    13.
    发明专利
    未知

    公开(公告)号：DE60303661D1

    公开(公告)日：2006-04-27

    申请号：DE60303661

    申请日：2003-06-04

    Applicant: ST MICROELECTRONICS SA

    Inventor： ENGUENT JEAN-PIERRE

    IPC: G06K7/00 ,  G06K17/00 ,  H03D5/00 ,  H04B1/59 ,  H04B5/02

    Abstract: The demodulation of a signal emitted by the transponder detects (7) a magnitude (I) which is a function of the transponder loading on a resonant circuit (L1,C1). Parallel phase (6) and amplitude (22) demodulators receive the signal from the detector (7), and their outputs are added (29). A delay (31) in the amplitude demodulator path compensates differences in propagation time.

    14.
    发明专利
    未知

    公开(公告)号：DE69805039T2

    公开(公告)日：2002-11-21

    申请号：DE69805039

    申请日：1998-11-17

    Applicant: ST MICROELECTRONICS SA

    Inventor： ENGUENT JEAN-PIERRE

    IPC: G01R31/28 ,  G01R31/315 ,  G01R31/316

    Abstract: The input capacitance is connected to one of the test inductances (Lf, Lf2, Lf3, Lf4), chosen to form together a resonance test circuit (45,47), having a resonance frequency sensitive to the proper frequency of the resonance receiver circuit (10). Method of testing an integrated circuit (1) including an input capacity (Cin) provided so as to form with an antenna coil (11) a resonant receiving circuit (10) with its own ore-determined frequency (Fp). The method is applicable to a an integrated circuit before its connection to an antenna coil. The method has the following stages: - connect the input capacity (Cin) of the integrated circuit to a test inductance (Lt) chosen so as to form with the input capacitance (Cin) a resonant test circuit (45) having a frequency sensibly equal to the frequency (Fp) of the resonant receiver, and - excite the resonant test circuit (45) by means of an alternating signal (It), through a transformer (41). The transformer (41) has on its secondary winding (40) an inductive loss forming all or part of the test inductance (Lt). The transformer (41) is of the toroidal type whose primary (42) and secondary (40) windings do not overlap.

    17.
    发明专利
    未知

    公开(公告)号：DE60303661T2

    公开(公告)日：2006-10-05

    申请号：DE60303661

    申请日：2003-06-04

    Applicant: ST MICROELECTRONICS SA

    Inventor： ENGUENT JEAN-PIERRE

    IPC: G06K7/00 ,  G06K17/00 ,  H03D5/00 ,  H04B1/59 ,  H04B5/02

    Abstract: The demodulation of a signal emitted by the transponder detects (7) a magnitude (I) which is a function of the transponder loading on a resonant circuit (L1,C1). Parallel phase (6) and amplitude (22) demodulators receive the signal from the detector (7), and their outputs are added (29). A delay (31) in the amplitude demodulator path compensates differences in propagation time.

    18.
    发明专利
    未知

    公开(公告)号：DE69900622T2

    公开(公告)日：2002-08-01

    申请号：DE69900622

    申请日：1999-06-17

    Applicant: ST MICROELECTRONICS SA

    Inventor： ENGUENT JEAN-PIERRE

    IPC: G06K19/00 ,  H04B5/00 ,  H04B5/02

    Abstract: The system uses inductive coupling to provide an enhanced signal to noise ratio. The system (30) provides detection of a charge modulation signal (S1) by means of inductive coupling. It comprises an aerial circuit comprising a coil (L1, T1) and a circuit (1,2,R1) for applying an excitation signal (V0) of predetermined frequency (F0) to the aerial. Phase comparators (3) receive the excitation signal on a first input, and a signal sampled from the aerial circuit (L1) on a second input. The aerial circuit (L1) does not form a resonant circuit in the region of the excitation signal frequency. The phase comparator (3) receives on its second input a signal (V(lm)), delivered by the device (31) which detects the current (lm) passing through the coil (L1).

    19.
    发明专利
    未知

    公开(公告)号：DE69900622D1

    公开(公告)日：2002-01-31

    申请号：DE69900622

    申请日：1999-06-17

    Applicant: ST MICROELECTRONICS SA

    Inventor： ENGUENT JEAN-PIERRE

    IPC: G06K19/00 ,  H04B5/00 ,  H04B5/02

    Abstract: The system uses inductive coupling to provide an enhanced signal to noise ratio. The system (30) provides detection of a charge modulation signal (S1) by means of inductive coupling. It comprises an aerial circuit comprising a coil (L1, T1) and a circuit (1,2,R1) for applying an excitation signal (V0) of predetermined frequency (F0) to the aerial. Phase comparators (3) receive the excitation signal on a first input, and a signal sampled from the aerial circuit (L1) on a second input. The aerial circuit (L1) does not form a resonant circuit in the region of the excitation signal frequency. The phase comparator (3) receives on its second input a signal (V(lm)), delivered by the device (31) which detects the current (lm) passing through the coil (L1).

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