公开(公告)号：US20080112696A1

公开(公告)日：2008-05-15

申请号：US11697520

申请日：2007-04-06

申请人： Liyong Chen ,  Irfan Azam Chaudhry ,  Steven Chacko

发明人： Liyong Chen ,  Irfan Azam Chaudhry ,  Steven Chacko

IPC分类号： H02P7/285

CPC分类号： G11B19/28

摘要： Methods and apparatus to lock a phase lock loop to a spindle motor are disclosed. An example controller comprises a counter to determine a period of an operating signal received from a motor, an oscillator to generate a control signal based on an input signal, and an initializer to generate the input value based on the period, wherein the input value causes the oscillator to generate the control signal having the same phase as the operating signal.

摘要翻译： 公开了将锁相环锁定到主轴电机的方法和装置。 示例性控制器包括：计数器，用于确定从电动机接收的操作信号的周期;基于输入信号产生控制信号的振荡器;以及初始化器，用于基于所述周期生成所述输入值，其中所述输入值导致 该振荡器产生具有与操作信号相同相位的控制信号。

公开(公告)号：US08434158B2

公开(公告)日：2013-04-30

申请号：US13220012

申请日：2011-08-29

申请人： Jianxin Ma ,  Sung Ung Kwak ,  Irfan Azam Chaudhry

发明人： Jianxin Ma ,  Sung Ung Kwak ,  Irfan Azam Chaudhry

IPC分类号： G06F1/26 ,  G06F11/00 ,  G08B13/00 ,  G08B21/00 ,  G08B29/00

CPC分类号： G06F21/86

摘要： Various embodiments of the present invention relates to systems, devices and methods of detecting tampering and preventing unauthorized access by incorporating programmability and randomness into a process of coupling, driving and sensing conductive wires that are arranged above sensitive areas in a secured system. Such a tampering detection system comprises a security mesh network, a random number generator, a security controller and a security monitor. The security mesh network includes a plurality of security elements made from the conductive wires. The security controller selects a subset of security elements, forms a security array, and generates a driving stimulus. The security monitor selects a SENSE node, monitors an output at the SENSE node, and generates a flag signal indicating the presence of a tampering attempt. Programmability and randomness are introduced to at least one of the system parameters including array configuration, driving stimulus, SENSE node, and detection mode via random numbers.

摘要翻译： 本发明的各种实施例涉及通过将可编程性和随机性并入安装在安全系统中的敏感区域上方的导线的耦合，驱动和感测过程来检测篡改并防止未授权访问的系统，设备和方法。 这种篡改检测系统包括安全网状网络，随机数发生器，安全控制器和安全监视器。 安全网状网络包括由导线制成的多个安全元件。 安全控制器选择安全元素的子集，形成安全阵列，并产生驾驶刺激。 安全监视器选择SENSE节点，监视SENSE节点处的输出，并产生指示篡改尝试的存在的标志信号。 可编程性和随机性通过随机数引入至少一个系统参数，包括阵列配置，驾驶刺激，SENSE节点和检测模式。

公开(公告)号：US20130055416A1

公开(公告)日：2013-02-28

申请号：US13220012

申请日：2011-08-29

申请人： Jianxin Ma ,  Sung Ung Kwak ,  Irfan Azam Chaudhry

发明人： Jianxin Ma ,  Sung Ung Kwak ,  Irfan Azam Chaudhry

IPC分类号： G06F21/02

CPC分类号： G06F21/86

摘要： Various embodiments of the present invention relates to systems, devices and methods of detecting tampering and preventing unauthorized access by incorporating programmability and randomness into a process of coupling, driving and sensing conductive wires that are arranged above sensitive areas in a secured system. Such a tampering detection system comprises a security mesh network, a random number generator, a security controller and a security monitor. The security mesh network includes a plurality of security elements made from the conductive wires. The security controller selects a subset of security elements, forms a security array, and generates a driving stimulus. The security monitor selects a SENSE node, monitors an output at the SENSE node, and generates a flag signal indicating the presence of a tampering attempt. Programmability and randomness are introduced to at least one of the system parameters including array configuration, driving stimulus, SENSE node, and detection mode via random numbers.

摘要翻译： 本发明的各种实施例涉及通过将可编程性和随机性并入安装在安全系统中的敏感区域上方的导线的耦合，驱动和感测过程来检测篡改并防止未授权访问的系统，设备和方法。 这种篡改检测系统包括安全网状网络，随机数发生器，安全控制器和安全监视器。 安全网状网络包括由导线制成的多个安全元件。 安全控制器选择安全元素的子集，形成安全阵列，并产生驾驶刺激。 安全监视器选择SENSE节点，监视SENSE节点处的输出，并产生指示篡改尝试的存在的标志信号。 可编程性和随机性通过随机数引入至少一个系统参数，包括阵列配置，驾驶刺激，SENSE节点和检测模式。