ONE-TIME PROGRAMMABLE MEMORY CELL
    63.
    发明专利

    公开(公告)号:AU2003226880A1

    公开(公告)日:2003-09-04

    申请号:AU2003226880

    申请日:2003-02-11

    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 ).

    65.
    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

    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.

    67.
    发明专利
    未知

    公开(公告)号:FR2808140B1

    公开(公告)日:2002-07-05

    申请号:FR0005105

    申请日:2000-04-20

    Abstract: The circuit for detecting the frequency of binary signals includes a circuit for detecting rising edges in the binary signals, a measuring circuit for measuring the period between the rising edges which supplies a logic state, and a shift register whose input latch stores the logic state. Also, the detecting circuit includes a shift circuit for shifting logic states of the shift register, and a decoding circuit for decoding logic states of the register, and which supplies a signal validating the signals. The detecting circuit can be used in contactless chip card readers.

    68.
    发明专利
    未知

    公开(公告)号:FR2808634A1

    公开(公告)日:2001-11-09

    申请号:FR0005802

    申请日:2000-05-05

    Abstract: The electromagnetic transponder has an oscillating circuit to extract the high frequency amplitude modulated signal and a demodulator (17) of the digital words carried. There are separate regulators for the voltage feed and the voltage carrying the digital words (61,70). The digital word voltage has a time constant above that of the voltage feed adjustment.

    69.
    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

    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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