公开(公告)号：US06134687A

公开(公告)日：2000-10-17

申请号：US994430

申请日：1997-12-19

申请人： Srimat Chakradhar ,  Arun Balakrishnan

发明人： Srimat Chakradhar ,  Arun Balakrishnan

IPC分类号： G01R31/3185 ,  G01R31/28

CPC分类号： G01R31/318586

摘要： A method, system and a computer product for a new partial scan technique that incurs significantly less overhead than the full-scan technique and yet achieves very high test coverage in short CPU times are provided. Scan memory elements are selected so that the scanned circuit satisfies two key properties in the test mode. First, the scanned circuit has partitions that are peripherally interacting finite state machines (peripheral partitions). Second, the memory element dependency graph (S-graph) of each peripheral partition of the scanned circuit has a tree structure. An efficient for algorithm peripheral partitioning and tree decomposition is provided. The scan memory element selection algorithm iteratively partitions the S-graph into disjoint sub-graphs with the tree structure.

公开(公告)号：US06732310B1

公开(公告)日：2004-05-04

申请号：US09568049

申请日：2000-05-10

申请人： Srimat Chakradhar ,  Arun Balakrishnan

发明人： Srimat Chakradhar ,  Arun Balakrishnan

IPC分类号： G01R3128

CPC分类号： G01R31/318586

摘要： A method, system and a computer product for a new partial scan technique that incurs significantly less overhead than the full-scan technique and yet achieves very high test coverage in short CPU times are provided. Scan memory elements are selected so that the scanned circuit satisfies two key properties in the test mode. First, the scanned circuit has partitions that are peripherally interacting finite state machines (peripheral partitions). Second, the memory element dependency graph (S-graph) of each peripheral partition of the scanned circuit has a tree structure. An efficient for algorithm peripheral partitioning and tree decomposition is provided. The scan memory element selection algorithm iteratively partitions the S-graph into disjoint sub-graphs with the tree structure.

摘要翻译： 提供了一种用于新的局部扫描技术的方法，系统和计算机产品，其导致比全扫描技术显着更少的开销，并且在短的CPU时间内实现非常高的测试覆盖。 选择扫描存储元件，使得扫描电路在测试模式下满足两个关键属性。 首先，扫描电路具有外围相互作用的有限状态机（外围分区）的分区。 第二，扫描电路的每个外围分区的存储元件依赖图（S图）具有树结构。 提供了一种高效的算法外设分区和树分解。 扫描存储器元件选择算法将S-graph迭代地分割成具有树结构的不相交的子图。

公开(公告)号：US06505316B1

公开(公告)日：2003-01-07

申请号：US09497521

申请日：2000-02-04

申请人： Srimat Chakradhar ,  Arun Balakrishnan

发明人： Srimat Chakradhar ,  Arun Balakrishnan

IPC分类号： H04B1700

CPC分类号： G01R31/318586

摘要： A method, system and a computer product for a new partial scan technique that incurs significantly less overhead than the full-scan technique and yet achieves very high test coverage in short CPU times are provided. Scan memory elements are selected so that the scanned circuit satisfies two key properties in the test mode. First, the scanned circuit has partitions that are peripherally interacting finite state machines (peripheral partitions). Second, the memory element dependency graph (S-graph) of each peripheral partition of the scanned circuit has a tree structure. An efficient for algorithm peripheral partitioning and tree decomposition is provided. The scan memory element selection algorithm iteratively partitions the S-graph into disjoint sub-graphs with the tree structure.

摘要翻译： 提供了一种用于新的局部扫描技术的方法，系统和计算机产品，其导致比全扫描技术显着更少的开销，并且在短的CPU时间内实现非常高的测试覆盖。 选择扫描存储元件，使得扫描电路在测试模式下满足两个关键属性。 首先，扫描电路具有外围相互作用的有限状态机（外围分区）的分区。 第二，扫描电路的每个外围分区的存储元件依赖图（S图）具有树结构。 提供了一种高效的算法外设分区和树分解。 扫描存储器元件选择算法将S-graph迭代地分割成具有树结构的不相交的子图。

公开(公告)号：US5812344A

公开(公告)日：1998-09-22

申请号：US855809

申请日：1997-05-12

申请人： Arun Balakrishnan

发明人： Arun Balakrishnan

IPC分类号： G11B5/60 ,  G11B5/39 ,  G11B5/48 ,  G11B21/16

CPC分类号： G11B5/4853 ,  G11B21/16 ,  G11B5/484 ,  G11B5/486 ,  G11B5/3967

摘要： A head suspension has a segmented trace conductor array for electrically interconnecting a read/write head to electronic circuitry in a disk drive. Each trace segment has a predetermined generally rectangular cross-sectional area such that the intermediate first segment has a predetermined cross-sectional width greater than a predetermined cross-sectional width of an first outer segment, in order to optimize current density at very high signaling frequencies associated with information transfer between the head and the read/write circuitry.

摘要翻译： 磁头悬架具有用于将读/写头与磁盘驱动器中的电子电路电互连的分段迹线导体阵列。 每个迹线段具有预定的大致矩形横截面积，使得中间第一段具有大于第一外部段的预定横截面宽度的预定横截面宽度，以便在非常高的信号频率下优化电流密度 与头部和读取/写入电路之间的信息传输相关联。

公开(公告)号：US08839429B2

公开(公告)日：2014-09-16

申请号：US13290932

申请日：2011-11-07

申请人： Daniel Komaromy ,  Alex Gantman ,  Brian M. Rosenberg ,  Arun Balakrishnan ,  Renwei Ge ,  Gregory G. Rose ,  Anand Palanigounder

发明人： Daniel Komaromy ,  Alex Gantman ,  Brian M. Rosenberg ,  Arun Balakrishnan ,  Renwei Ge ,  Gregory G. Rose ,  Anand Palanigounder

IPC分类号： G06F11/30 ,  G06F12/14 ,  G06F21/52 ,  G06F21/56 ,  G06F21/55 ,  G06F11/34 ,  G06F12/08

CPC分类号： G06F21/52 ,  G06F11/3037 ,  G06F11/3466 ,  G06F12/0811 ,  G06F12/0848 ,  G06F12/0875 ,  G06F12/14 ,  G06F21/554 ,  G06F21/566 ,  G06F2212/452

摘要： Methods, devices, and systems for detecting return-oriented programming (ROP) exploits are disclosed. A system includes a processor, a main memory, and a cache memory. A cache monitor develops an instruction loading profile by monitoring accesses to cached instructions found in the cache memory and misses to instructions not currently in the cache memory. A remedial action unit terminates execution of one or more of the valid code sequences if the instruction loading profile is indicative of execution of an ROP exploit involving one or more valid code sequences. The instruction loading profile may be a hit/miss ratio derived from monitoring cache hits relative to cache misses. The ROP exploits may include code snippets that each include an executable instruction and a return instruction from valid code sequences.

摘要翻译： 公开了用于检测返回式编程（ROP）漏洞的方法，设备和系统。 系统包括处理器，主存储器和高速缓冲存储器。 高速缓存监视器通过监视对高速缓冲存储器中发现的高速缓存指令的访问来开发指令加载简档，并且错过当前不在高速缓冲存储器中的指令。 如果指令加载简档指示涉及一个或多个有效代码序列的ROP利用的执行，补救动作单元终止一个或多个有效代码序列的执行。 指令加载简档可以是相对于高速缓存未命中从监视高速缓存命中得到的命中/未命中比率。 ROP利用可能包括代码段，每个代码片段都包含可执行指令和来自有效代码序列的返回指令。

公开(公告)号：US20120068837A1

公开(公告)日：2012-03-22

申请号：US12888206

申请日：2010-09-22

申请人： Arun Balakrishnan ,  Alexander Gantman ,  Brian M. Rosenberg ,  Yinian Mao ,  Renwei Ge

发明人： Arun Balakrishnan ,  Alexander Gantman ,  Brian M. Rosenberg ,  Yinian Mao ,  Renwei Ge

IPC分类号： B60R25/10

CPC分类号： B60R25/00

摘要： Disclosed is an apparatus and method to detect vehicle theft. In one embodiment, a processor may be configured to execute instructions to: receive a vehicle detection signal from a vehicle detector; determine whether a vehicle is present or absent based upon the vehicle detection signal; establish an authentication credential after the vehicle is determined to present; and validate the authentication credential to indicate validated parking. If the vehicle is determined to be absent and an authentication credential to un-park the vehicle has not been validated, a notification action may be transmitted to appropriate personnel to indicate that the vehicle has been moved or un-parked without proper authentication.

摘要翻译： 公开了一种检测车辆盗窃的装置和方法。 在一个实施例中，处理器可以被配置为执行指令以：从车辆检测器接收车辆检测信号; 基于车辆检测信号来确定车辆是否存在或不存在; 车辆确定出现后建立认证凭证; 并验证验证凭证以指示已验证的停车。 如果车辆被确定为不存在并且未停止车辆的认证证书尚未被验证，则可以向适当的人员发送通知动作以指示车辆已被移动或未被停放而没有正确认证。

公开(公告)号：US07518817B1

公开(公告)日：2009-04-14

申请号：US11484864

申请日：2006-07-10

申请人： Arun Balakrishnan ,  John VanLaanen ,  Leo Lopez ,  John Shaw ,  Bruce D. Buch ,  Claud L. Blevins

发明人： Arun Balakrishnan ,  John VanLaanen ,  Leo Lopez ,  John Shaw ,  Bruce D. Buch ,  Claud L. Blevins

IPC分类号： G11B15/46

CPC分类号： G11B33/1493

摘要： A disk drive having reduced electromagnetic emission quasi-peaks is provided. The repetition rate of servo blocks or data is reduced, spread or otherwise altered. In one embodiment, the number of data zones is increased to achieve an emissions reduction goal. In one embodiment, the disk drive is configured to effectively have one track per zone. In one embodiment, the rotation rate of the disk is varied or the effective data bit density, as detected by the read/write head, is otherwise varied. In one embodiment, servo-sectors are intentionally positioned to vary the length, along the track, of inter-servo intervals.

摘要翻译： 提供具有减小的电磁发射准峰值的磁盘驱动器。 伺服块或数据的重复率降低，扩展或以其他方式改变。 在一个实施例中，增加了数据区的数量以实现减排目标。 在一个实施例中，盘驱动器被配置成每个区域有效地具有一个轨道。 在一个实施例中，盘的旋转速率是变化的，或者由读/写头检测到的有效数据位密度被改变。 在一个实施例中，伺服扇区被有意地定位成沿着轨道改变伺服间间隔的长度。

公开(公告)号：US06625781B2

公开(公告)日：2003-09-23

申请号：US09771100

申请日：2001-01-26

申请人： Wolfgang Roethig ,  Ganesh Lakshminarayana ,  Anand Raghunathan ,  Arun Balakrishnan

发明人： Wolfgang Roethig ,  Ganesh Lakshminarayana ,  Anand Raghunathan ,  Arun Balakrishnan

IPC分类号： G06F1750

CPC分类号： G06F17/5022 ,  G06F2217/78

摘要： The invention utilizes the linear complexity of orthogonal vectors to reduce the number of equations (or variables) to be solved. The present invention constructs a power model of a set of combinations of states without considering irrelevant combinations. The invention distinguishes between the switching direction on the input and the output pin. The invention considers state-dependency as a function of power consumed and depending on the paths through internal nodes. The model considers switching input pins that do not cause the output pin to switch to overcome inaccuracies caused by combining the power pin model with the state and arc power model with state. The model considers switching input pins that cause the output pin to switch. For cells in which the slewrate propagation effect from input to output is negligible, the invention uses a model of 2 power pins with state. The invention also determines the validity of this model. The present invention also models a power arc from one input pin to multiple output pins.

公开(公告)号：US6038102A

公开(公告)日：2000-03-14

申请号：US784559

申请日：1997-01-21

申请人： Arun Balakrishnan ,  Stephen P. Williams

发明人： Arun Balakrishnan ,  Stephen P. Williams

IPC分类号： G11B5/48 ,  G11B21/00

CPC分类号： G11B5/4853 ,  G11B21/00 ,  G11B5/486 ,  G11B5/484

摘要： A trace conductor array includes an electrically insulative support substrate and a plurality of electrical signal trace conductors formed along substantially parallel paths in a single layer on the substrate. The electrical signal trace conductors each have a plurality of spaced apart trace conductor segments. Passive electrical trace conductors are formed on the substrate in spaces between the spaced apart adjacent trace conductor segments, and are spaced apart and electrically isolated therefrom. The passive trace conductors generally follow a geometry of the spaced apart segments and thereby repel magnetic flux lines at higher frequencies and result in decoupling of the high frequency current-carrying conductor trace segments. A preferred application is for interconnecting a head and a preamplifier/drive circuit within a hard disk drive.

摘要翻译： 轨迹导体阵列包括电绝缘支撑衬底和沿衬底上单层中的基本平行路径形成的多个电信号迹线导体。 电信号迹线导体各自具有多个间隔开的迹线导体段。 无源电迹线导体在间隔开的相邻迹线导体段之间的空间中形成在衬底上，并且与其隔开并与之电绝缘。 无源迹线导体通常遵循间隔开的段的几何形状，从而以更高的频率排斥磁通线，并导致高频载流导体迹线段的去耦。 优选的应用是将磁头和前置放大器/驱动电路互连在硬盘驱动器内。

公开(公告)号：US08736433B2

公开(公告)日：2014-05-27

申请号：US12888206

申请日：2010-09-22

申请人： Arun Balakrishnan ,  Alexander Gantman ,  Brian M. Rosenberg ,  Yinian Mao ,  Renwei Ge

发明人： Arun Balakrishnan ,  Alexander Gantman ,  Brian M. Rosenberg ,  Yinian Mao ,  Renwei Ge

IPC分类号： G08G1/096883

CPC分类号： B60R25/00

摘要： Disclosed is an apparatus and method to detect vehicle theft. In one embodiment, a processor may be configured to execute instructions to: receive a vehicle detection signal from a vehicle detector; determine whether a vehicle is present or absent based upon the vehicle detection signal; establish an authentication credential after the vehicle is determined to present; and validate the authentication credential to indicate validated parking. If the vehicle is determined to be absent and an authentication credential to un-park the vehicle has not been validated, a notification action may be transmitted to appropriate personnel to indicate that the vehicle has been moved or un-parked without proper authentication.

摘要翻译： 公开了一种检测车辆盗窃的装置和方法。 在一个实施例中，处理器可以被配置为执行指令以：从车辆检测器接收车辆检测信号; 基于车辆检测信号来确定车辆是否存在或不存在; 车辆确定出现后建立认证凭证; 并验证验证凭证以指示已验证的停车。 如果车辆被确定为不存在并且未停止车辆的认证凭证未被验证，则可以向适当的人员发送通知动作，以指示车辆已被移动或未被停放而没有正确认证。