公开(公告)号：US5481694A

公开(公告)日：1996-01-02

申请号：US873928

申请日：1992-04-24

申请人： Chia-Chiang Chao ,  Robert M. English ,  David M. Jacobson ,  Alexander A. Stepanov ,  Andrew J. Wilkes

发明人： Chia-Chiang Chao ,  Robert M. English ,  David M. Jacobson ,  Alexander A. Stepanov ,  Andrew J. Wilkes

IPC分类号： G06F3/06 ,  G06F11/14 ,  G11B20/10 ,  G11B20/12 ,  G11B27/11 ,  G06F13/00

CPC分类号： G11B27/11 ,  G06F11/1451 ,  G06F3/0601 ,  G11B20/10 ,  G11B20/1252 ,  G06F2003/0697 ,  G11B2020/1282

摘要： An electronic data storage system including a memory, a plurality of magnetic disk units, and a controller. The memory contains an index cross-referencing logical address with physical addresses, an obsolete list and a free list. In response to a "write " command, the controller selects a physical address according to which segment can be used the most quickly, appends a tag to the data to be written, and writes the data to the selected segment. Appropriate entries are made in the index and the free list. The system recovers from memory loss by using a checkpoint log and a set of checkpoint segments on the disk that together contain backups of the index and other critical information needed to restore the system. Group indices are used for roll-back groups; operations on data in a group are invisible outside the group until after a "commit " command is issued.

摘要翻译： 一种包括存储器，多个磁盘单元和控制器的电子数据存储系统。 内存包含一个具有物理地址的索引交叉引用逻辑地址，一个过时的列表和一个空闲列表。 响应于“写”命令，控制器根据哪个段可以最快地使用物理地址，将标签附加到要写入的数据上，并将数据写入所选择的段。 在索引和空闲列表中进行适当的输入。 系统通过使用检查点日志和磁盘上的一组检查点段来恢复内存丢失，其中包含索引的备份和恢复系统所需的其他关键信息。 组索引用于回滚组; 在发出“提交”命令之后，组内的数据的操作在组外不可见。

公开(公告)号：US5073210A

公开(公告)日：1991-12-17

申请号：US527050

申请日：1990-05-22

申请人： Giles Humpston ,  David M. Jacobson

发明人： Giles Humpston ,  David M. Jacobson

IPC分类号： C22C5/02 ,  C22F1/14 ,  H01L21/48 ,  H01L23/48

CPC分类号： H01L21/4821 ,  C22C5/02 ,  C22F1/14 ,  H01L21/4885 ,  H01L23/48 ,  H01L2924/0002

摘要： A method of making material in the form of a fine wire or thin strip or sheet suitable for use as electrical conductors comprises: forming an ingot substantially consisting of an alloy of gold and one or more of the metals titanium, lutetium, zirconium, scandium and hafnium, the amount of the or each of said one or more of the metals in the alloy lying in the range from substantially 0.1 at % to an upper limit comprising the atomic percentage of that metal corresponding to the maximum solubility of that metal in the alloy; solution heat treating the ingot and then quenching the ingot from the solution heat treatment temperature; mechanically working the ingot to have a maximum dimension in at least one direction of not greater than 250 .mu.m; and heat treating the resulting material at a temperature below its solvus temperature from an ambient atmosphere containing oxygen and/or nitrogen in the ambient atmosphere. The conductors exhibit high tensile strength and resistance to elongation under load and retention of such properties after being heated to elevated temperatures for extended periods of time, such as to render them particularly suitable for use as bond-wires in integrated circuit packages.

公开(公告)号：US5031822A

公开(公告)日：1991-07-16

申请号：US472220

申请日：1990-01-30

申请人： Giles Humpston ,  David M. Jacobson ,  Brian P. Cameron

发明人： Giles Humpston ,  David M. Jacobson ,  Brian P. Cameron

IPC分类号： B23K35/00 ,  H01L21/60 ,  H01L23/492

CPC分类号： H01L24/83 ,  B23K35/005 ,  H01L23/4924 ,  H01L24/29 ,  H01L2224/29109 ,  H01L2224/29111 ,  H01L2224/8319 ,  H01L2224/83801 ,  H01L2924/01005 ,  H01L2924/01006 ,  H01L2924/01013 ,  H01L2924/01015 ,  H01L2924/01029 ,  H01L2924/01032 ,  H01L2924/01033 ,  H01L2924/01039 ,  H01L2924/01042 ,  H01L2924/01045 ,  H01L2924/01046 ,  H01L2924/01047 ,  H01L2924/01049 ,  H01L2924/0105 ,  H01L2924/01063 ,  H01L2924/01074 ,  H01L2924/01075 ,  H01L2924/01078 ,  H01L2924/01079 ,  H01L2924/0132 ,  H01L2924/01322 ,  H01L2924/01327 ,  H01L2924/0133 ,  H01L2924/014

摘要： A method of brazing a silicon component to a molybdenum and/or tungsten component wherein prior to brazing the surface of the molybdenum and/or tungsten component is first provided with a thin gold coating and then a coating of palladium, platinum or rhodium. This allows satisfactory brazing to be effected using conventional aluminum-based brazes at temperatures below 650.degree. C.

公开(公告)号：US20130073598A1

公开(公告)日：2013-03-21

申请号：US13367322

申请日：2012-02-06

申请人： David M. Jacobson ,  Xiaochun Zhu ,  Wenqing Wu ,  Kendrick Hoy Leong Yuen ,  Seung H. Kang

发明人： David M. Jacobson ,  Xiaochun Zhu ,  Wenqing Wu ,  Kendrick Hoy Leong Yuen ,  Seung H. Kang

IPC分类号： G06F7/58 ,  G06F21/00

CPC分类号： G06F7/588 ,  G06F5/01 ,  G06F2205/00 ,  G06F2207/581 ,  G11C11/1659 ,  G11C11/1673 ,  G11C11/1695 ,  G11C11/1697 ,  H03M7/30

摘要： An entropy source and a random number (RN) generator are disclosed. In one aspect, a low-energy entropy source includes a magneto-resistive (MR) element and a sensing circuit. The MR element is applied a static current and has a variable resistance determined based on magnetization of the MR element. The sensing circuit senses the resistance of the MR element and provides random values based on the sensed resistance of the MR element. In another aspect, a RN generator includes an entropy source and a post-processing module. The entropy source includes at least one MR element and provides first random values based on the at least one MR element. The post-processing module receives and processes the first random values (e.g., based on a cryptographic hash function, an error detection code, a stream cipher algorithm, etc.) and provides second random values having improved randomness characteristics.

公开(公告)号：US09602276B2

公开(公告)日：2017-03-21

申请号：US13157048

申请日：2011-06-09

申请人： David M. Jacobson ,  Lu Xiao ,  David J. Julian ,  Zhanfeng Jia ,  Brian M. Buesker ,  Vito R. Bica ,  Edward H. Teague

发明人： David M. Jacobson ,  Lu Xiao ,  David J. Julian ,  Zhanfeng Jia ,  Brian M. Buesker ,  Vito R. Bica ,  Edward H. Teague

IPC分类号： H04L9/08 ,  H04L9/32 ,  H04W12/04

CPC分类号： H04L9/0833 ,  H04L9/0844 ,  H04L9/3213 ,  H04L9/3297 ,  H04L2209/76 ,  H04L2209/80 ,  H04W12/04

摘要： One feature provides a method for a client node to establish a session key with a group node by obtaining an epoch identity value associated with a current epoch, wherein obtaining the epoch identity value includes one of computing the epoch identity value based on a node real time or negotiating the epoch identity value with the group node, computing a restricted key using a shared secret key, the epoch identity value, and a group node identity associated with the group node, and executing a session key establishment protocol with the group node to derive the session key using the restricted key as a master key in the session key establishment protocol. The session key may be established between the group node and the client node even though communications between the group node and the central node is only intermittently available during the current epoch.

公开(公告)号：US09110746B2

公开(公告)日：2015-08-18

申请号：US13602776

申请日：2012-09-04

申请人： Xiaochun Zhu ,  Wenqing Wu ,  David M. Jacobson ,  Seung H. Kang ,  Kendrick H. Yuen

发明人： Xiaochun Zhu ,  Wenqing Wu ,  David M. Jacobson ,  Seung H. Kang ,  Kendrick H. Yuen

IPC分类号： G06F7/58

CPC分类号： G06F7/582 ,  G06F7/588

摘要： Embodiments of the disclosure are directed to generating a random number. An embodiment of the disclosure passes a current from a read operation through a magnetic tunnel junction (MTJ) to cause a first magnetization orientation of a free layer to switch to a second magnetization orientation, the switch in magnetization orientation causing a change in a resistance of the MTJ, and periodically samples the resistance of the MTJ to generate a bit value for the random number.

摘要翻译： 本公开的实施例涉及生成随机数。 本公开的实施例将来自读取操作的电流通过磁性隧道结（MTJ），以使自由层的第一磁化取向切换到第二磁化取向，磁化方向上的开关导致电阻的变化 MTJ周期性地对MTJ的电阻进行采样，以生成随机数的位值。

公开(公告)号：US20140067890A1

公开(公告)日：2014-03-06

申请号：US13602776

申请日：2012-09-04

申请人： Xiaochun Zhu ,  Wenqing Wu ,  David M. Jacobson ,  Seung H. Kang ,  Kendrick H. Yuen

发明人： Xiaochun Zhu ,  Wenqing Wu ,  David M. Jacobson ,  Seung H. Kang ,  Kendrick H. Yuen

IPC分类号： G06F7/58

CPC分类号： G06F7/582 ,  G06F7/588

摘要： Embodiments of the disclosure are directed to generating a random number. An embodiment of the disclosure passes a current from a read operation through a magnetic tunnel junction (MTJ) to cause a first magnetization orientation of a free layer to switch to a second magnetization orientation, the switch in magnetization orientation causing a change in a resistance of the MTJ, and periodically samples the resistance of the MTJ to generate a bit value for the random number.

摘要翻译： 本公开的实施例涉及生成随机数。 本公开的实施例将来自读取操作的电流通过磁性隧道结（MTJ），以使自由层的第一磁化取向切换到第二磁化取向，磁化方向上的开关导致电阻的变化 MTJ周期性地对MTJ的电阻进行采样，以生成随机数的位值。

公开(公告)号：US5587997A

公开(公告)日：1996-12-24

申请号：US393650

申请日：1995-02-24

申请人： David M. Jacobson

发明人： David M. Jacobson

IPC分类号： H04L29/06 ,  H04L29/08 ,  H04J3/22

CPC分类号： H04L29/06 ,  H04L69/326

摘要： A method and apparatus for determining when all packets of a message sent over a computer network by a source computer have arrived at a destination computer includes a counter located at the source computer for storing an initial value and for assigning a delta value to each packet in the message, where the last packet stores a delta value that is equal to the counters initial value minus number of packets previously sent modulo the counter range; and includes an accumulator located at the destination computer for extracting the delta value from each packet of the message. The destination computer is notified that all packets in the message have arrived only when the sum of the extracted delta values stored in the accumulator is equal to zero modulo the capacity of the accumulator.

摘要翻译： 一种用于确定由源计算机通过计算机网络发送的消息的所有分组何时到达目的地计算机的方法和装置，包括位于源计算机处的用于存储初始值的计数器，并用于向每个分组分配增量值 消息，其中最后一个分组存储等于计数器初始值的增量值减去先前向计数器范围模拟的分组数; 并且包括位于目的地计算机处的用于从消息的每个分组提取增量值的累加器。 通知目的地计算机，消息中的所有分组只有当存储在累加器中的所提取的增量值的和等于累加器的容量为零时才到达。

公开(公告)号：US4715034A

公开(公告)日：1987-12-22

申请号：US708749

申请日：1985-03-04

申请人： David M. Jacobson

发明人： David M. Jacobson

IPC分类号： G06F11/22 ,  G06F11/00 ,  G06F12/16 ,  G11C29/10 ,  G11C29/36 ,  G06F11/26

CPC分类号： G11C29/10 ,  G11C29/36

摘要： Random bits are written successively into the cells of a random access memory (RAM) system, then complemented, through a first sequence of cell addresses distributed substantially uniformly throughout all the cells of the memory. Through an opposite address sequence, the contents of the cells are read and then complemented. Finally, through the initial sequence of cell addresses, the contents of the cells are again read. Differences between read and expected cell contents identify memory cell faults. The random bits preferably are generated by a softward implemented, reversible pseudorandom sequence generator, and the uniform address sequence is generated by an address hasher programmed with an address function that exercises all address lines essentially equally.

摘要翻译： 随机比特被连续地写入随机存取存储器（RAM）系统的单元中，然后通过基本均匀地分布在存储器的所有单元中的单元地址的第一序列进行补充。 通过相对的地址序列，读取单元格的内容，然后进行补充。 最后，通过单元地址的初始序列，再次读取单元的内容。 读取和预期单元格内容之间的差异识别存储单元故障。 随机比特优选地由软实现的可逆伪随机序列生成器产生，并且均匀地址序列由地址编程器编程，地址函数基本上相等地运行所有地址线。

公开(公告)号：US09189201B2

公开(公告)日：2015-11-17

申请号：US13367322

申请日：2012-02-06

申请人： David M. Jacobson ,  Xiaochun Zhu ,  Wenqing Wu ,  Kendrick Hoy Leong Yuen ,  Seung H. Kang

发明人： David M. Jacobson ,  Xiaochun Zhu ,  Wenqing Wu ,  Kendrick Hoy Leong Yuen ,  Seung H. Kang

IPC分类号： G06F7/58

CPC分类号： G06F7/588 ,  G06F5/01 ,  G06F2205/00 ,  G06F2207/581 ,  G11C11/1659 ,  G11C11/1673 ,  G11C11/1695 ,  G11C11/1697 ,  H03M7/30

摘要： An entropy source and a random number (RN) generator are disclosed. In one aspect, a low-energy entropy source includes a magneto-resistive (MR) element and a sensing circuit. The MR element is applied a static current and has a variable resistance determined based on magnetization of the MR element. The sensing circuit senses the resistance of the MR element and provides random values based on the sensed resistance of the MR element. In another aspect, a RN generator includes an entropy source and a post-processing module. The entropy source includes at least one MR element and provides first random values based on the at least one MR element. The post-processing module receives and processes the first random values (e.g., based on a cryptographic hash function, an error detection code, a stream cipher algorithm, etc.) and provides second random values having improved randomness characteristics.

摘要翻译： 公开了熵源和随机数（RN）生成器。 一方面，低能量熵源包括磁阻（MR）元件和感测电路。 MR元件施加静态电流，并具有基于MR元件的磁化确定的可变电阻。 感测电路感测MR元件的电阻，并根据检测到的MR元件的电阻提供随机值。 另一方面，RN发生器包括熵源和后处理模块。 熵源包括至少一个MR元素，并且基于至少一个MR元素提供第一随机值。 后处理模块接收并处理第一随机值（例如，基于加密散列函数，错误检测码，流密码算法等）并提供具有改进的随机特性的第二随机值。