Advanced time domain reflection cable testing
    21.
    发明授权
    Advanced time domain reflection cable testing 失效
    高级时域反射电缆测试

    公开(公告)号:US07679371B1

    公开(公告)日:2010-03-16

    申请号:US11254147

    申请日:2005-10-19

    申请人: William Lo

    发明人: William Lo

    IPC分类号: G01R31/11

    CPC分类号: G01R31/11 G01R31/021

    摘要: A cable testing system that tests cable includes a pulse generation module that transmits a first pulse on a first communications channel of the cable. A sampling module waits a predetermined time period after the pulse generation module transmits the first pulse and then detects a first amplitude of a reflected signal on a second communications channel of the cable. A time domain reflection (TDR) module receives the first amplitude and verifies proper operation of the cable based on the first amplitude. The predetermined time period corresponds with an estimated roundtrip propagation delay of the first pulse when the first pulse is reflected back to the cable testing system after traveling a first predetermined distance along the cable. The sampling module incrementally increases the predetermined time period during subsequent iterations of a cable test in order to verify proper operation of a predetermined segment of the cable.

    摘要翻译: 测试电缆的电缆测试系统包括脉冲发生模块,其在电缆的第一通信信道上发送第一脉冲。 在脉冲生成模块发送第一脉冲之后,采样模块等待预定的时间段,然后检测电缆的第二通信信道上的反射信号的第一幅度。 时域反射(TDR)模块接收第一幅度,并根据第一幅度验证电缆的正确操作。 当沿着电缆行进第一预定距离之后第一脉冲被反射回电缆测试系统时,预定时间段对应于估计的第一脉冲的往返传播延迟。 在随后的电缆测试迭代期间,采样模块递增地增加预定时间段,以便验证电缆的预定段的正确操作。

    64/66 encoder
    22.
    发明授权
    64/66 encoder 有权
    64/66编码器

    公开(公告)号:US07627023B1

    公开(公告)日:2009-12-01

    申请号:US11453193

    申请日:2006-06-14

    申请人: William Lo

    发明人: William Lo

    IPC分类号: H04B1/38

    CPC分类号: H04L69/22

    摘要: A physical layer device for a network interface includes a reconciliation device that includes a first interface that outputs data. A physical coding sublayer (PCS) device communicates with the first interface and includes an encoder that encodes the data to produce an encoded data block including an offset portion and n data blocks, each including at least one of data portions and control code portions. The encoder is capable of locating the control code portions within any of the n data blocks based on the offset portion.

    摘要翻译: 用于网络接口的物理层设备包括对帐设备,其包括输出数据的第一接口。 物理编码子层(PCS)设备与第一接口通信,并且包括对数据进行编码以产生包括偏移部分和n个数据块的编码数据块的编码器,每个数据块包括数据部分和控制代码部分中的至少一个。 编码器能够基于偏移部分将控制代码部分定位在任何n个数据块内。

    Generalized auto media selector
    23.
    发明授权
    Generalized auto media selector 失效
    广告自动媒体选择器

    公开(公告)号:US07619975B1

    公开(公告)日:2009-11-17

    申请号:US11201111

    申请日:2005-08-10

    申请人: William Lo

    发明人: William Lo

    IPC分类号: G01R31/08

    摘要: A network media selection system comprises a memory that stores priority information for each of a plurality of ports and a media selector module that communicates with the memory, that receives activity signals and link signals from the plurality of ports, and that uses the activity signals, the link signals, and the priority information to generate enable signals for the plurality of ports. A respective port attempts to establish a link when a corresponding one of the enable signals is in a first state, and the respective port detects physical layer activity when a corresponding one of the enable signals is in a second state. The media selector module selectively sets enable signals to the second state for all of the plurality of ports other than a target port, which has the highest priority and has generated a link signal.

    摘要翻译: 网络媒体选择系统包括:存储器,用于存储多个端口中的每一个的优先级信息;以及媒体选择器模块,其与所述存储器进行通信,所述媒体选择器模块从所述多个端口接收活动信号和链接信号,并且使用所述活动信号, 链路信号和用于生成多个端口的使能信号的优先级信息。 当相应的一个使能信号处于第一状态时,相应端口尝试建立链路,并且当相应的一个使能信号处于第二状态时,相应端口检测物理层活动。 媒体选择器模块对具有最高优先级并且已经生成链路信号的目标端口以外的所有多个端口选择性地设置使能信号为第二状态。

    Apparatus and method for probing integrated circuits using laser illumination
    24.
    发明授权
    Apparatus and method for probing integrated circuits using laser illumination 有权
    使用激光照明探测集成电路的装置和方法

    公开(公告)号:US07616312B2

    公开(公告)日:2009-11-10

    申请号:US11169423

    申请日:2005-06-29

    IPC分类号: G01B11/00

    CPC分类号: G01R31/308 G01R31/311

    摘要: An apparatus and method for laser probing of a DUT at very high temporal resolution is disclosed. The system includes a CW laser source, a beam optics designed to point two orthogonally polarized beams at the same location on the DUT, optical detectors for detecting the reflected beams, collection electronics, and an oscilloscope. The beam optics defines a common-path polarization differential probing (PDP) optics. The common-path PDP optics divides the laser beam into two beams of orthogonal polarization. Due to the intrinsic asymmetry of a CMOS transistor, the interaction of the beams with the DUT result in different phase modulation in each beam. This difference can be investigated to study the response of the DUT to the stimulus signal.

    摘要翻译: 公开了一种以非常高的时间分辨率激光探测DUT的装置和方法。 该系统包括CW激光源,设计用于在DUT上的相同位置处指向两个正交偏振光束的光束光学元件,用于检测反射光束的光学检测器,收集电子器件和示波器。 光束光学器件定义了共路径偏振微分探测(PDP)光学器件。 公共路径PDP光学将激光束分成两束正交极化。 由于CMOS晶体管的固有不对称性,光束与DUT的相互作用在每个光束中产生不同的相位调制。 可以研究这种差异来研究DUT对刺激信号的响应。

    Method and apparatus for fiber auto-negotiation
    25.
    发明授权
    Method and apparatus for fiber auto-negotiation 有权
    光纤自动协商的方法和装置

    公开(公告)号:US07561592B1

    公开(公告)日:2009-07-14

    申请号:US11825820

    申请日:2007-07-09

    IPC分类号: H04L12/413

    CPC分类号: H04L12/40136

    摘要: A network comprising a first network device including a first physical layer device with a receiver and a first autonegotiation circuit having an ability detect state and including a bypass timer that determines a predetermined period, a first medium, and a second network device that includes a second physical layer device and that communicates over the first medium with the first network device. The first network device enables autonegotiation bypass and establishes a link with the second network device after the predetermined period during which a link between the first and second network devices is not up, and the receiver of the first physical layer device is in sync.

    摘要翻译: 一种网络,包括包括具有接收机的第一物理层设备和具有能力检测状态的第一自动协商电路的第一网络设备,并且包括确定预定周期的旁路定时器,第一介质和第二网络设备,所述第二网络设备包括第二网络设备 物理层设备,并且通过第一介质与第一网络设备进行通信。 第一网络设备在第一和第二网络设备之间的链路不在,并且第一物理层设备的接收机同步的预定时段之后,使自动协商旁路并建立与第二网络设备的链路。

    Multi-speed serial interface for media access control and physical layer devices
    26.
    发明授权
    Multi-speed serial interface for media access control and physical layer devices 有权
    用于媒体访问控制和物理层设备的多速串行接口

    公开(公告)号:US07343425B1

    公开(公告)日:2008-03-11

    申请号:US10646601

    申请日:2003-08-21

    IPC分类号: G06F15/16

    摘要: A network device includes a media access control (MAC) device that transmits a first data stream at a first data rate that includes symbols having M bits. A translator converts the first data stream to a second data stream at a second data rate. The translator includes a data appender that appends N bits to the symbols in the first data stream to generate second symbols having M+N bits. A data duplicator duplicates the second symbols X times to produce the second data stream at the second data rate.

    摘要翻译: 网络设备包括以包括具有M比特的符号的第一数据速率发送第一数据流的媒体接入控制(MAC)设备。 翻译器以第二数据速率将第一数据流转换为第二数据流。 翻译器包括数据追加器,其将N位附加到第一数据流中的符号,以生成具有M + N位的第二符号。 数据复制器复制第二符号X次以产生第二数据速率的第二数据流。

    Multispeed communications device
    27.
    发明授权
    Multispeed communications device 有权
    多速通讯设备

    公开(公告)号:US07221294B1

    公开(公告)日:2007-05-22

    申请号:US11592888

    申请日:2006-11-03

    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 X level output signals and the m-bit output based on the second mapping function to Y level output signals, where X and Y are integers greater than one and X is different than Y.

    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位输出根据第二映射函数选择性地映射到X电平输出信号和m位输出到Y电平输出信号, 其中X和Y是大于1的整数,X不同于Y.

    APPARATUS AND METHOD FOR DETECTING PHOTON EMISSIONS FROM TRANSISTORS
    28.
    发明申请
    APPARATUS AND METHOD FOR DETECTING PHOTON EMISSIONS FROM TRANSISTORS 有权
    用于检测晶体管光子发射的装置和方法

    公开(公告)号:US20060181268A1

    公开(公告)日:2006-08-17

    申请号:US11380044

    申请日:2006-04-25

    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.

    摘要翻译: 用于分析光子发射数据以鉴别由晶体管发射的光子和由背景源发射的光子的系统,装置和方法。 该分析涉及光子发射的空间和/或时间相关性。 在相关之后,分析可进一步涉及获得相关光子由晶体管发射的可能性。 在相关之后,分析还可以进一步包括将权重分配给单个光子发射作为相关性的函数。 在一些情况下,重量反映了光子被晶体管发射的可能性。 该分析还可以包括自动识别光子发射图像中的晶体管。

    Cable tester
    29.
    发明授权
    Cable tester 有权
    电缆测试仪

    公开(公告)号:US07075283B1

    公开(公告)日:2006-07-11

    申请号:US11254384

    申请日:2005-10-20

    IPC分类号: G01R31/11

    CPC分类号: G01R27/04 G01R31/11

    摘要: A physical layer device including a first port and a second port comprises a cable tester that communicates with the first and second ports and that determines a cable status, which includes an open status, a short status, and a normal status. Opposite ends of a cable selectively communicate with the first and second ports. The cable tester includes a test module that transmits a test pulse on the cable, measures reflection amplitude, calculates a cable length, and determines the cable status based on the measured amplitude and the calculated cable length. A frequency synthesizer communicates with the cable and that selectively outputs a plurality of signals at a plurality of frequencies on the first port. An insertion loss calculator receives the signals on the second port and that estimates insertion loss.

    摘要翻译: 包括第一端口和第二端口的物理层设备包括与第一和第二端口通信并且确定包括打开状态,短状态和正常状态的电缆状态的电缆测试器。 电缆的相对端部与第一和第二端口选择性地通信。 电缆测试仪包括一个在电缆上传输测试脉冲的测试模块,测量反射幅度,计算电缆长度,并根据测量的振幅和计算的电缆长度来确定电缆状态。 频率合成器与电缆通信,并且选择性地以第一端口上的多个频率输出多个信号。 插入损耗计算器接收第二端口上的信号并估计插入损耗。

    Cable tester
    30.
    发明授权
    Cable tester 有权
    电缆测试仪

    公开(公告)号:US07002353B1

    公开(公告)日:2006-02-21

    申请号:US10400864

    申请日:2003-03-27

    IPC分类号: G01R31/11

    CPC分类号: H04L1/248 H04L43/50

    摘要: A physical layer device communicates with a second physical layer device over a cable. The physical layer device includes a cable tester that identifies when the second physical layer device is disconnected from the cable. The cable tester includes a test initiating circuit that initiates a cable test when a link is lost, a test module that transmits test pulses on the pairs of the cable, measures reflection amplitudes, calculates cable lengths, and determines whether the pairs have said open status based on said measured amplitude and said calculated cable length, and a reporting circuit that generates a disconnect signal when at least one of the pairs has an open status.

    摘要翻译: 物理层设备通过电缆与第二物理层设备通信。 物理层设备包括电缆测试器,其识别何时第二物理层设备与电缆断开连接。 电缆测试器包括测试启动电路,当链路丢失时启动电缆测试,测试模块在电缆对上传输测试脉冲,测量反射幅度,计算电缆长度,并确定对是否具有打开状态 基于所述测量的幅度和所述计算的电缆长度,以及报告电路,当所述对中的至少一个具有打开状态时,生成断开信号。