公开(公告)号：US09941880B1

公开(公告)日：2018-04-10

申请号：US15353530

申请日：2016-11-16

Applicant: Xilinx, Inc.

Inventor： Austin H. Lesea ,  Stephen M. Trimberger

IPC: H03K19/00 ,  H03K19/003 ,  H01L23/00 ,  H01L23/525 ,  H03K19/177 ,  G05F1/46 ,  G06F21/86

CPC classification number: H03K19/003 ,  G05F1/46 ,  G06F21/86 ,  H01L23/5256 ,  H01L23/576 ,  H03K19/17744 ,  H03K19/17768

Abstract: A system includes an integrated circuit (IC) chip with connections to plurality of external pins. An integrated voltage regulator circuit is configured to provide an internal supply voltage to the IC chip. Isolation circuitry is configured to inhibit tampering of the internal supply voltage through the external pins. An analog to digital converter (ADC) circuit is configured to monitor parameters of the internal supply voltage. Security circuitry is configured to detect, using the monitored parameters, indications of tampering and to generate an error signal in response to detecting an indication of tampering.

公开(公告)号：US20150358085A1

公开(公告)日：2015-12-10

申请号：US14297535

申请日：2014-06-05

Applicant: Xilinx, Inc.

Inventor： Stephen M. Trimberger ,  Austin H. Lesea

IPC: H04B10/50 ,  H04B10/548

CPC classification number: H04B10/503 ,  H04B10/5161 ,  H04B10/548

Abstract: Various apparatuses, circuits, systems, and methods for optical communication are disclosed. In some implementations an optical transmitter includes an optical data port configured to engage an optical fiber. The optical transmitter also includes a plurality of lasers coupled to the optical data port and configured and arranged to transmit respective optical signals over the optical fiber via the optical data port when selected. A control circuit of the optical transmitter is configured to receive an input data signal and encode the input data signal for transmission over the optical fiber by selecting one or more of the plurality of lasers at a time. The control circuit is configured to select one or more of the plurality of lasers at a time according to one of a frequency modulation encoding algorithm or an amplitude modulation encoding algorithm.

Abstract translation: 公开了用于光通信的各种装置，电路，系统和方法。 在一些实现中，光发射机包括被配置为接合光纤的光学数据端口。 光发射机还包括耦合到光数据端口的多个激光器，并被配置和布置成当选择时通过光数据端口在光纤上传输相应的光信号。 光发射器的控制电路被配置为接收输入数据信号，并且通过选择一次中的多个激光器中的一个或多个来编码输入数据信号以在光纤上传输。 控制电路被配置为根据频率调制编码算法或幅度调制编码算法之一来一次选择多个激光器中的一个或多个。

公开(公告)号：US08892903B1

公开(公告)日：2014-11-18

申请号：US13706660

申请日：2012-12-06

Applicant: Xilinx, Inc.

Inventor： Stephen M. Trimberger

IPC: G06F21/70 ,  G06F21/55

CPC classification number: H04L9/003 ,  G06F21/755 ,  G09C1/00 ,  H04L9/06 ,  H04L2209/12

Abstract: A circuit for detecting power analysis attacks includes at least one load circuit, a power supply line, and a switch coupled to the load circuit and to the power supply line. The switch is configured to enable and disable the at least one load circuit, and a voltage monitor is configured to sample voltage levels of the supply voltage. A detection circuit is coupled to the switch and to the voltage monitor. The detection circuit is configured to generate control signals for enabling and disabling the at least one load circuit, compare a first voltage level sampled when the at least one load circuit is disabled to a second voltage level sampled when the at least one load circuit is enabled, and generate an attack-detection signal in response to a difference between the sampled first voltage level and the sampled second voltage level being greater than a threshold voltage level.

Abstract translation: 用于检测功率分析攻击的电路包括至少一个负载电路，电源线和耦合到负载电路和电源线的开关。 开关被配置为启用和禁用至少一个负载电路，并且电压监视器被配置为对电源电压的电压电平进行采样。 检测电路耦合到开关和电压监视器。 检测电路被配置为产生用于启用和禁用至少一个负载电路的控制信号，将当至少一个负载电路被禁用时采样的第一电压电平与当至少一个负载电路被使能时采样的第二电压电平进行比较 并且响应于所述采样的第一电压电平和所述采样的第二电压电平之间的差大于阈值电压电平而产生攻击检测信号。