公开(公告)号：US20020080965A1

公开(公告)日：2002-06-27

申请号：US09995258

申请日：2001-11-27

Applicant: STMicroelectronics S.A.

Inventor： Fabrice Marinet ,  Alexandre Malherbe

IPC: H04L009/00

CPC classification number: G06F7/588 ,  G06K19/073 ,  G06K19/07363 ,  H03K3/84

Abstract: A random signal generator uses a folded MOS transistor, whose drain-source current includes a random component, as an electronic noise source. The random signal generator generates a random binary signal from the random component. The invention may be applied, in particular, to smart cards.

Abstract translation: 随机信号发生器使用其漏源电流包括随机分量的折叠MOS晶体管作为电子噪声源。 随机信号发生器从随机分量生成随机二进制信号。 本发明特别可以应用于智能卡。

公开(公告)号：US20010020857A1

公开(公告)日：2001-09-13

申请号：US09771364

申请日：2001-01-26

Applicant: STMicroelectronics S.A.

Inventor： Alexandre Malherbe ,  Fabrice Marinet ,  Alain Pomet

IPC: H03K005/01

CPC classification number: G06K19/07 ,  G06F13/426

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.

Abstract translation: 用于从外部串行总线再生时钟信号的装置包括环形振荡器和计数器。 环形振荡器提供时钟信号的n个相位。 在这n个阶段中，使用一个相作为参考，并将其应用于计数器。 因此，可以对从总线接收的第一脉冲和第二脉冲之间的整个参考时钟信号周期的数量进行计数。 在接收到第二脉冲时读取振荡器中的相位状态，确定与基准时钟信号和总线的第二脉冲之间的相位延迟相对应的电流相位。 通过使用还包括环形振荡器和计数器的再生装置，可以高精度地重新生成总线的时钟信号。