公开(公告)号：US20010038341A1

公开(公告)日：2001-11-08

申请号：US09837629

申请日：2001-04-18

Applicant: STMicroelectronics S.A.

Inventor： Ahmed Kari ,  Michel Bardouillet

IPC: G08C019/00

CPC classification number: G06K19/07 ,  G01R31/007 ,  G01R31/026

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.

Abstract translation: 用于检测二进制信号的频率的电路包括用于检测二进制信号中的上升沿的电路，用于测量提供逻辑状态的上升沿之间的周期的测量电路和输入锁存器存储逻辑状态的移位寄存器。 此外，检测电路包括用于移位移位寄存器的逻辑状态的移位电路和用于解码寄存器的逻辑状态的解码电路，并提供验证信号的信号。 检测电路可用于非接触式芯片读卡器。

公开(公告)号：US20040107230A1

公开(公告)日：2004-06-03

申请号：US10721655

申请日：2003-11-25

Applicant: STMicroelectronics S.A.

Inventor： Michel Bardouillet

IPC: G06F001/02

CPC classification number: G06F7/588 ,  H03K3/84

Abstract: A generator of random numbers by a flip-flop having a data input receiving a first signal at a first frequency comprised in a predetermined range and the instantaneous value of which is conditioned by a disturbing signal, and having a clock input receiving a second signal at a second predetermined frequency, smaller than the first one, said second signal passing through a delay element giving it a delay greater than or equal to the maximum period of the first signal.

Abstract translation: 一种由触发器产生的随机数的发生器，其具有数据输入，该数据输入以包含在预定范围内的第一频率接收第一信号，其瞬时值由干扰信号调节，并且具有接收第二信号的时钟输入 第二预定频率小于第一预定频率，所述第二信号通过延迟元件，给予其大于或等于第一信号的最大周期的延迟。

公开(公告)号：US20020105376A1

公开(公告)日：2002-08-08

申请号：US10038515

申请日：2002-01-02

Applicant: STMicroelectronics S.A.

Inventor： Michel Bardouillet ,  Nathalie Donat ,  Vineet Tiwart

IPC: H04Q005/22

CPC classification number: G06K19/0701 ,  G01S13/758 ,  G06K19/0723

Abstract: An electromagnetic transponder including an oscillating circuit adapted to extracting from a radiating field a high-frequency amplitude-modulated signal, circuitry for extracting from said high-frequency signal an approximately D.C. supply voltage, a demodulator of data carried by the high-frequency signal, and circuitry for separately regulating the supply voltage and a useful voltage carrying the data.

Abstract translation: 一种电磁应答器，包括适于从辐射场提取高频幅度调制信号的电路，所述振荡电路用于从所述高频信号提取近似的DC电源电压，由所述高频信号承载的数据的解调器， 以及用于单独调节电源电压的电路和承载数据的有用电压。