公开(公告)号：US07250771B1

公开(公告)日：2007-07-31

申请号：US11455359

申请日：2006-06-19

申请人： William Lo ,  Yiging Guo ,  Tek Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

发明人： William Lo ,  Yiging Guo ,  Tek Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

IPC分类号： G01R31/11

CPC分类号： G01R31/021 ,  G01R31/11

摘要： A cable tester comprises a test initiating module that performs B cable tests. Each of said B cable tests includes selectively transmitting a test pulse on the cable, measuring a reflection amplitude, and calculating a cable length. A test results module determines a cable status for each of said B cable tests based on said measured amplitude and said calculated cable length and that determines an overall cable status of the cable based on the cable at least one of passing and failing A out of B cable tests. A and B are integers greater than zero and B is greater than A.

摘要翻译： 电缆测试仪包括执行B电缆测试的测试启动模块。 所述B电缆测试中的每一个包括选择性地在电缆上发送测试脉冲，测量反射幅度以及计算电缆长度。 测试结果模块基于所述测量的幅度和所计算的电缆长度来确定每个所述B电缆测试的电缆状态，并且基于所述电缆确定所述电缆的整体电缆状态，所述电缆至少一个通过和失败的B中的A 电缆测试。 A和B是大于零的整数，B大于A.

公开(公告)号：US07135996B1

公开(公告)日：2006-11-14

申请号：US11124997

申请日：2005-05-09

申请人： William Lo ,  Xiaopeng Chen

发明人： William Lo ,  Xiaopeng Chen

IPC分类号： H03M5/06

CPC分类号： H03M5/145 ,  H03M5/16 ,  H03M5/20

摘要： A physical layer device for a network device comprises a converter module that selectively converts an n-bit input to an m-bit output based on first and second mapping functions. A scrambler module selectively scrambles the m-bit output. An encoding module receives the m-bit output from the scrambler module and selectively maps the m-bit output based on the first mapping function to three level output signals and the m-bit output based on the second mapping function to four level output signals.

摘要翻译： 用于网络设备的物理层设备包括转换器模块，其基于第一和第二映射功能选择性地将n位输入转换为m位输出。 扰频器模块选择性地加扰m位输出。 编码模块从加扰器模块接收m位输出，并将基于第一映射功能的m位输出选择性地映射到三电平输出信号，并将基于第二映射函数的m位输出映射到四电平输出信号。

公开(公告)号：US07065075B1

公开(公告)日：2006-06-20

申请号：US11072323

申请日：2005-03-07

申请人： William Lo

发明人： William Lo

IPC分类号： H04L12/50 ,  H04L27/04

CPC分类号： H04L49/40 ,  H04L49/30 ,  H04L49/351

摘要： A system for encoding signals for a network device includes an encoder configured to encode a transmit control signal. The transmit control signal includes a transmit enable signal in a first half of a cycle of a clock signal, and a transmit error signal in a second half of the cycle of the clock signal. The system includes a control signal transmitter configured to transmit the encoded transmit control signal. The system includes a data signal transmitter configured to transmit a transmit data signal. When neither the transmit enable signal nor the transmit error signal is in a first state in a respective half of the cycle of the clock signal, the transmit data signal includes signaling data.

摘要翻译： 用于对网络设备的信号进行编码的系统包括被配置为对发射控制信号进行编码的编码器。 发送控制信号在时钟信号的周期的前半部分中包括发送使能信号，并且在时钟信号的周期的后半部分包括发送误差信号。 该系统包括被配置为发送编码的发射控制信号的控制信号发射机。 该系统包括被配置为发送发送数据信号的数据信号发送器。 当发送使能信号和发送错误信号在时钟信号的周期的相应一半中处于第一状态时，发送数据信号包括信令数据。

公开(公告)号：US20060108997A1

公开(公告)日：2006-05-25

申请号：US11296888

申请日：2005-12-08

申请人： Romain Desplats ,  Patricia Le Coupanec ,  William Lo ,  Philippe Perdu ,  Steven Kasapi

发明人： Romain Desplats ,  Patricia Le Coupanec ,  William Lo ,  Philippe Perdu ,  Steven Kasapi

IPC分类号： G01R31/28

CPC分类号： G01R31/2656 ,  G01R31/311

摘要： A system, apparatus, and method for analyzing photon emission data to discriminate between photons emitted by transistors and photons emitted by background sources. The analysis involves spatial and/or temporal correlation of photon emissions. After correlation, the analysis may further involve obtaining a likelihood that the correlated photons were emitted by a transistor. After correlation, the analysis may also further involve assigning a weight to individual photon emissions as a function of the correlation. The weight, in some instances, reflecting a likelihood that the photons were emitted by a transistor. The analysis may further involve automatically identifying transistors in a photon emission image.

公开(公告)号：US06993667B1

公开(公告)日：2006-01-31

申请号：US09990137

申请日：2001-11-21

申请人： William Lo

发明人： William Lo

IPC分类号： G06F1/32

CPC分类号： H04L12/12 ,  Y02D50/20 ,  Y02D50/40 ,  Y02D50/42

摘要： An energy saving circuit is connected to a receiver of a first physical layer of a first network device. The energy saving device has first and second energy saving modes. In the first energy saving mode, a sense circuit generates a receive signal when connection activity is detected by the receiver. The energy saving circuit powers down the physical layer when the receiver does not detect the connection activity. An autonegotiation circuit powers up the first physical layer and negotiates a connection with a second physical layer of a second network device when the sense circuit generates the receive signal. In a second energy saving mode, a second timer periodically powers a transmitter and generates a link pulse. After the transmitter generates the link pulse, the transmitter is turned off.

摘要翻译： 节能电路连接到第一网络设备的第一物理层的接收器。 节能装置具有第一和第二节能模式。 在第一节能模式中，当接收器检测到连接活动时，感测电路产生接收信号。 当接收机没有检测到连接活动时，节能电路关闭物理层。 当感测电路产生接收信号时，自动协商电路对第一物理层加电并协商与第二网络设备的第二物理层的连接。 在第二节能模式中，第二定时器周期性地对发射机供电并产生链路脉冲。 变送器产生链路脉冲后，发送器关闭。

公开(公告)号：US06992491B1

公开(公告)日：2006-01-31

申请号：US10990176

申请日：2004-11-16

申请人： William Lo ,  Yiqing Guo ,  Tak Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

发明人： William Lo ,  Yiqing Guo ,  Tak Tsui ,  Tsin-Ho Leung ,  Runsheng He ,  Eric Janofsky

IPC分类号： G01R31/11

CPC分类号： G01R31/021 ,  G01R31/11

摘要： A cable tester tests cable and determines a cable pass/fail status. A pretest module senses activity on the cable and selectively enables testing based on the sensed activity. A test module is enabled by the pretest module, transmits a test pulse on the cable, measures a reflection amplitude, and calculates a cable length. The cable status includes an open status, a short status, and a normal status. The test module determines the cable status of the cable based on the cable at least one of passing and failing A out of B cable tests. The test module determines the cable status for each of the B tests based on the measured amplitude and the calculated cable length.

摘要翻译： 电缆测试仪测试电缆并确定电缆通过/失败状态。 预测试模块感测电缆上的活动，并选择性地启用基于感测到的活动的测试。 测试模块由预测试模块使能，在电缆上发送测试脉冲，测量反射幅度，并计算电缆长度。 电缆状态包括打开状态，短状态和正常状态。 测试模块根据电缆确定电缆的电缆状态，B电缆测试中至少有一个通过和失败的A。 测试模块根据测量的幅度和计算的电缆长度来确定每个B测试的电缆状态。

公开(公告)号：US06842481B1

公开(公告)日：2005-01-11

申请号：US09170221

申请日：1998-10-13

申请人： William Lo

发明人： William Lo

IPC分类号： H04B3/36 ,  H04J3/06 ,  H04L12/24 ,  H04L12/413 ,  H04L12/46 ,  H04L29/06 ,  H04L29/08

CPC分类号： H04B3/36 ,  H04J3/0688 ,  H04L12/4625 ,  H04L41/046 ,  H04L49/3054 ,  H04L63/16 ,  H04L69/323

摘要： An arrangement for secure repeater communication in an IEEE 802.3 network by transmitting transmit data and a transmit enable signal on a selected repeater port based on an address lookup table in the repeater core. The other repeater ports that do not have a network address corresponding to the destination address of data packet receive corrupted data generated in response to signals from the respective repeater ports. The repeater ports cause generation of corrupted data by concurrently outputting an asserted transmit error signal and an unasserted transmit enable signal on the corresponding media independent interface. A physical layer transceiver, upon detecting the concurrent assertion of the transmit error signal and the deassertion of the transmit enable signal on the media independent interface, selectively outputs a prescribed data pattern as the transmit data to the network node. The prescribed data pattern may also be output to a secondary media independent interface, which receives a modified transmit enable signal. Hence, network nodes receiving the corrupted transmit data interpret the corrupted transmit data as a valid data packet for another network node, as opposed to symbol errors. Hence, network data can be transmitted along secure repeater ports without generation of an artificially high number of symbol errors.

摘要翻译： 通过基于中继器核心中的地址查找表，在所选中继器端口上发送发送数据和发送使能信号，在IEEE 802.3网络中进行安全中继器通信的装置。 没有与数据分组的目的地地址相对应的网络地址的其他中继器端口接收到响应于来自各个中继器端口的信号产生的损坏的数据。 中继器端口通过在相应的媒体独立接口上同时输出断言的发送错误信号和未经发送的发送使能信号来引起损坏数据的产生。 物理层收发器在检测到传输错误信号的同时断言和在媒体独立接口上的发送使能信号的消除时，选择性地将规定的数据模式作为发送数据输出到网络节点。 规定的数据模式也可以被输出到辅媒体独立接口，该接口接收修改的发射使能信号。 因此，与符号错误相反，接收损坏的发送数据的网络节点将损坏的发送数据解释为用于另一网络节点的有效数据分组。 因此，网络数据可以沿着安全中继器端口传送，而不会产生人为高数量的符号错误。

公开(公告)号：US06515506B1

公开(公告)日：2003-02-04

申请号：US09564711

申请日：2000-05-03

申请人： William Lo

发明人： William Lo

IPC分类号： H03K19173

CPC分类号： H03K19/1732

摘要： A circuit that reduces external terminal count of a semiconductor chip, such as a communications chip or other type of chip that requires the generation of configuration codes, by reducing the number of external input terminals required for generating the configuration data. The circuit includes multiplexers, each of which selects output data or configuration data, and includes an output in communication with a respective external output terminal of the chip. A selector is connectable between a selected one of the external output terminals and an external input terminal in communication with a memory to serially input configuration data on that output terminal to the memory to configure the chip. Thus, configuration codes are generated for the chip using a reduced number of external input terminals, thereby reducing the overall external terminal count of the chip. The circuit and chip may be embodied on a network or Ethernet card.

公开(公告)号：US5940392A

公开(公告)日：1999-08-17

申请号：US366809

申请日：1994-12-30

申请人： William Lo ,  Ian Crayford

发明人： William Lo ,  Ian Crayford

IPC分类号： H04L12/18 ,  H04L12/44 ,  H04L12/46 ,  H04L29/06 ,  H04J3/26 ,  H04J3/36

CPC分类号： H04L12/46 ,  H04L45/7453 ,  H04L63/10 ,  H04L12/18 ,  H04L12/44

摘要： In a repeater having multiple ports and receiving at a source port a data packet containing a received address, an address mapping system including a content addressable memory (CAM) with address registers containing stored addresses, and an address mapping matrix coupled to said CAM, for perfectly mapping any of the address registers to any of the ports. According to one aspect of the invention, it operates in a repeater having an address compare and disrupt security system. The preferred embodiment of the present invention includes a content addressable memory having address registers containing stored individual and multicast addresses associated with each repeater port, and an address mapping matrix including a disrupt enable circuit associated with each port, for enabling the disruption of the data packet at that port when the received destination address does not match the associated stored addresses, and for disabling the disruption of the data packet at that port when the received destination address matches the stored address in a particular register and that particular register is mapped to that port via an address mapping register.

摘要翻译： 在具有多个端口并且在源端口处接收包含接收到的地址的数据分组的中继器中，包括具有包含存储的地址的地址寄存器的内容可寻址存储器（CAM）的地址映射系统和耦合到所述CAM的地址映射矩阵， 将任何地址寄存器完美地映射到任何端口。 根据本发明的一个方面，其操作在具有地址比较和中断安全系统的中继器中。 本发明的优选实施例包括内容可寻址存储器，其具有包含与每个中继器端口相关联的存储的单独和多播地址的地址寄存器，以及包括与每个端口相关联的中断使能电路的地址映射矩阵，以便能够中断数据分组 当接收到的目的地地址与相关联的存储地址不匹配时，在该端口处，并且当接收到的目的地地址与特定寄存器中存储的地址匹配并且该特定寄存器被映射到该端口时禁止在该端口处的数据分组的中断 通过地址映射寄存器。

公开(公告)号：US5850515A

公开(公告)日：1998-12-15

申请号：US827675

申请日：1997-04-10

申请人： William Lo ,  Ian S. Crayford

发明人： William Lo ,  Ian S. Crayford

IPC分类号： H04L29/06 ,  G06F13/00

CPC分类号： H04L63/123 ,  H04L29/06 ,  H04L63/1416 ,  H04L63/1441

摘要： A method and apparatus for securing a network from access by unauthorized end stations. A port in a multiport repeater can be disabled automatically upon detection of an unknown source address in a data packet. In addition, an interrupt signal is provided to the indicate the detection of an intruder. Further, the disabling of the port can be done substantially immediately to interrupt the re-transmission of a single packet. Alternatively, the disabling of a port can be done programmably after a predetermined number of intruder packets have been detected, or after the verification of packet integrity.

摘要翻译： 一种用于保护网络免受未经授权的终端站访问的方法和装置。 检测到数据包中的未知源地址时，可以自动禁用多端口转发器中的端口。 另外，提供中断信号以指示入侵者的检测。 此外，端口的禁用可以基本上立即进行以中断单个分组的重传。 或者，在已经检测到预定数量的入侵者分组之后，或者在验证分组完整性之后，可以可编程地完成端口的禁用。