公开(公告)号：US20090168940A1

公开(公告)日：2009-07-02

申请号：US11967602

申请日：2007-12-31

申请人： Pervez M. Aziz ,  Adam B. Healey ,  Mohammad S. Mobin ,  Gary E. Schiessler ,  Gregory W. Sheets ,  Lane A. Smith ,  Paul H. Tracy ,  Geoffrey Zhang

发明人： Pervez M. Aziz ,  Adam B. Healey ,  Mohammad S. Mobin ,  Gary E. Schiessler ,  Gregory W. Sheets ,  Lane A. Smith ,  Paul H. Tracy ,  Geoffrey Zhang

IPC分类号： H04L7/00

CPC分类号： H04B10/6972

摘要： Methods and apparatus are provided for improving the jitter tolerance in an SFP limit amplified signal. Jitter tolerance is improved in a communications receiver by applying a received signal to an SFP limiting amplifier; and applying an output of the SFP limiting amplifier to a low pass filter to improve the jitter tolerance. The low pass filter optionally applies a programmable amount of attenuation to high frequency components of the output. The low pass filter slew rate controls (i.e., rotates) a data eye representation of the received signal to increase the data eye representation along a time axis. The noise margin of the received signal can optionally be improved by applying an output of the low pass filter to an all pass filter. A slew rate controller can evaluate the data eye statistics to determine a setting for the low pass filter.

摘要翻译： 提供了用于改善SFP限幅放大信号中的抖动容限的方法和装置。 在通信接收机中通过将接收到的信号施加到SFP限幅放大器来提高抖动容差; 并将SFP限幅放大器的输出施加到低通滤波器以提高抖动容限。 低通滤波器可选择地将可编程量的衰减应用于输出的高频分量。 低通滤波器转换速率控制（即旋转）接收信号的数据眼表示，以沿着时间轴增加数据眼睛表示。 可以通过将低通滤波器的输出施加到全通滤波器来可选地改善接收信号的噪声容限。 压摆率控制器可以评估数据眼统计量，以确定低通滤波器的设置。

公开(公告)号：US08040984B2

公开(公告)日：2011-10-18

申请号：US11967602

申请日：2007-12-31

申请人： Pervez M. Aziz ,  Adam B. Healey ,  Mohammad S. Mobin ,  Gary E. Schiessler ,  Gregory W. Sheets ,  Lane A. Smith ,  Paul H. Tracy ,  Geoffrey Zhang

发明人： Pervez M. Aziz ,  Adam B. Healey ,  Mohammad S. Mobin ,  Gary E. Schiessler ,  Gregory W. Sheets ,  Lane A. Smith ,  Paul H. Tracy ,  Geoffrey Zhang

IPC分类号： H04L25/08 ,  H04L7/10 ,  H04L7/00

CPC分类号： H04B10/6972

摘要： Methods and apparatus are provided for improving the jitter tolerance in an SFP limit amplified signal. Jitter tolerance is improved in a communications receiver by applying a received signal to an SFP limiting amplifier; and applying an output of the SFP limiting amplifier to a low pass filter to improve the jitter tolerance. The low pass filter optionally applies a programmable amount of attenuation to high frequency components of the output. The low pass filter slew rate controls (i.e., rotates) a data eye representation of the received signal to increase the data eye representation along a time axis. The noise margin of the received signal can optionally be improved by applying an output of the low pass filter to an all pass filter. A slew rate controller can evaluate the data eye statistics to determine a setting for the low pass filter.

摘要翻译： 提供了用于改善SFP限幅放大信号中的抖动容限的方法和装置。 在通信接收机中通过将接收到的信号施加到SFP限幅放大器来提高抖动容差; 并将SFP限幅放大器的输出施加到低通滤波器以提高抖动容限。 低通滤波器可选择地将可编程量的衰减应用于输出的高频分量。 低通滤波器转换速率控制（即旋转）接收信号的数据眼表示，以沿着时间轴增加数据眼睛表示。 可以通过将低通滤波器的输出施加到全通滤波器来可选地改善接收信号的噪声容限。 压摆率控制器可以评估数据眼统计量，以确定低通滤波器的设置。

公开(公告)号：US08559580B2

公开(公告)日：2013-10-15

申请号：US12494771

申请日：2009-06-30

申请人： Xingdong Dai ,  Dwight David Daugherty ,  Max J. Olsen ,  Lane A. Smith ,  Geoffrey Zhang

发明人： Xingdong Dai ,  Dwight David Daugherty ,  Max J. Olsen ,  Lane A. Smith ,  Geoffrey Zhang

IPC分类号： H04L7/00 ,  H04L25/00 ,  H04L25/40

CPC分类号： H04L1/20

摘要： Techniques are disclosed for asynchronous calibration for eye diagram generation. For example, a method for calibrating a process for generating a data eye associated with a received signal comprises the following steps. Samples of the received signal are obtained for a first unit interval using a first data latch and a roaming latch. A delay offset is determined between the first data latch and the roaming latch by comparing at least one sample obtained using the first data latch and at least one sample obtained using the roaming latch, wherein the delay offset determined by the comparison is used to calibrate the process for generating the data eye associated with the received signal. A similar comparison may be done for a second data latch and used to calibrate the process. The method is able to find the accurate position of each data latch with respect to the roaming latch so as to improve the accuracy of data decoding in a digital receiver, i.e., provide receiver optimization.

摘要翻译： 公开了用于眼图生成的异步校准的技术。 例如，用于校准与接收信号相关联的用于生成数据眼的处理的方法包括以下步骤。 使用第一数据锁存器和漫游锁存器，以第一单位间隔获得接收信号的样本。 通过比较使用第一数据锁存器获得的至少一个样本和使用漫游锁存器获得的至少一个样本，在第一数据锁存器和漫游锁存器之间确定延迟偏移，其中由比较确定的延迟偏移用于校准 用于产生与接收信号相关联的数据眼的过程。 可以对第二数据锁存器进行类似的比较，并用于校准该过程。 该方法能够找到每个数据锁存器相对于漫游锁存器的准确位置，以提高数字接收机中数据解码的准确度，即提供接收机优化。

公开(公告)号：US20100329318A1

公开(公告)日：2010-12-30

申请号：US12494771

申请日：2009-06-30

申请人： Xingdong Dai ,  Dwight David Daugherty ,  Max J. Olsen ,  Lane A. Smith ,  Geoffrey Zhang

发明人： Xingdong Dai ,  Dwight David Daugherty ,  Max J. Olsen ,  Lane A. Smith ,  Geoffrey Zhang

IPC分类号： H04B17/00

CPC分类号： H04L1/20

摘要： Techniques are disclosed for asynchronous calibration for eye diagram generation. For example, a method for calibrating a process for generating a data eye associated with a received signal comprises the following steps. Samples of the received signal are obtained for a first unit interval using a first data latch and a roaming latch. A delay offset is determined between the first data latch and the roaming latch by comparing at least one sample obtained using the first data latch and at least one sample obtained using the roaming latch, wherein the delay offset determined by the comparison is used to calibrate the process for generating the data eye associated with the received signal. A similar comparison may be done for a second data latch and used to calibrate the process. The method is able to find the accurate position of each data latch with respect to the roaming latch so as to improve the accuracy of data decoding in a digital receiver, i.e., provide receiver optimization.

摘要翻译： 公开了用于眼图生成的异步校准的技术。 例如，用于校准与接收信号相关联的用于生成数据眼的处理的方法包括以下步骤。 使用第一数据锁存器和漫游锁存器，以第一单位间隔获得接收信号的样本。 通过比较使用第一数据锁存器获得的至少一个样本和使用漫游锁存器获得的至少一个样本，在第一数据锁存器和漫游锁存器之间确定延迟偏移，其中由比较确定的延迟偏移用于校准 用于产生与接收信号相关联的数据眼的过程。 可以对第二数据锁存器进行类似的比较，并用于校准该过程。 该方法能够找到每个数据锁存器相对于漫游锁存器的准确位置，以提高数字接收机中数据解码的准确度，即提供接收机优化。

公开(公告)号：US08045608B2

公开(公告)日：2011-10-25

申请号：US12221002

申请日：2008-07-30

申请人： Xingdong Dai ,  Geoffrey Zhang ,  Max Olsen ,  Dwight Daugherty ,  Gary Schiessler ,  Mohammad Mobin ,  Lane Smith ,  Dennis Farley

发明人： Xingdong Dai ,  Geoffrey Zhang ,  Max Olsen ,  Dwight Daugherty ,  Gary Schiessler ,  Mohammad Mobin ,  Lane Smith ,  Dennis Farley

IPC分类号： H03H7/30

CPC分类号： H04L25/03057 ,  H04L2025/03592

摘要： In described embodiments, an adaptive equalizer employed by a receiver in a communication channel, such as Fibre Channel, employs pattern recognition. When a repeating pattern, such as an IDLE or ARBFF pattern, is employed by a standard to, for example, maintain a communication link, an equalizer of the receiver might adaptively set its equalizer parameters based on characteristics of the signal energy of the repeating pattern rather than adaptively set its equalizer parameters based on characteristics of the signal energy of generally random user data carried on the link. Pattern recognition by the receiver allows for maintaining adaptive equalizer parameters at settings preferred for data detection of the typical random data, improving data detection performance of the receiver when the channel transitions from a preset or synchronization repeating pattern to a user random data pattern.

摘要翻译： 在所描述的实施例中，由诸如光纤通道的通信信道中的接收机使用的自适应均衡器使用模式识别。 当诸如空闲或ARBFF模式的重复模式被标准采用以例如维持通信链路时，接收机的均衡器可以基于重复模式的信号能量的特性来自适应地设置其均衡器参数 而不是基于在链路上携带的一般随机用户数据的信号能量的特性自适应地设置其均衡器参数。 接收机的模式识别允许在优选用于典型随机数据的数据检测的设置下维持自适应均衡器参数，当信道从预设或同步重复模式转换到用户随机数据模式时，提高接收机的数据检测性能。

公开(公告)号：US20100290515A1

公开(公告)日：2010-11-18

申请号：US12467507

申请日：2009-05-18

申请人： Xingdong Dai ,  Wenyi Jin ,  Max J. Olsen ,  Geoffrey Zhang

发明人： Xingdong Dai ,  Wenyi Jin ,  Max J. Olsen ,  Geoffrey Zhang

IPC分类号： H03H7/40

CPC分类号： H04L25/03057

摘要： A receiver comprises equalization circuitry implementing at least first and second gain adaptation loops associated with respective first and second frequency bands. The equalization circuitry in one aspect is operative to identify a pattern in a portion of a received serial data stream, and to perform gain adaptation for the receiver utilizing a particular one of the gain adaptation loops responsive to the identified pattern. For example, the gain adaptation may be performed utilizing a low frequency gain adaptation loop if the detected pattern is of a first type generally associated with a low frequency band, and may be performed utilizing a high frequency gain adaptation loop if the detected pattern is of a second type generally associated with a high frequency band. In other aspects, the first and second gain adaptation loops may be activated in a particular serial order or in parallel.

摘要翻译： 接收机包括实现与相应的第一和第二频带相关联的至少第一和第二增益适配环路的均衡电路。 一个方面中的均衡电路用于识别接收的串行数据流的一部分中的模式，并且响应于所识别的模式，利用增益适配环路中的特定一个对接收机执行增益适配。 例如，如果检测到的模式是通常与低频带相关联的第一类型，则可以利用低频增益适配环来执行增益适配，并且如果检测到的模式是 通常与高频带相关联的第二类型。 在其他方面，可以以特定的串行顺序或并行地激活第一和第二增益适配环。

公开(公告)号：US08611406B2

公开(公告)日：2013-12-17

申请号：US12494805

申请日：2009-06-30

申请人： Xingdong Dai ,  Max J. Olsen ,  Scott A. Werner ,  Geoffrey Zhang

发明人： Xingdong Dai ,  Max J. Olsen ,  Scott A. Werner ,  Geoffrey Zhang

IPC分类号： H04B3/46 ,  H04B17/00 ,  H04Q1/20

CPC分类号： G01R31/3171

摘要： Communication system optimization using a soft receiver masking technique is disclosed. For example, a method for testing a communication device comprises obtaining a software representation of a receiver portion of a given communication device. A data signal received from a transmitter through a given link channel is then processed, wherein the processing step is performed using the software representation of the receiver portion of the communication device. An output signal is caused to be generated by the software representation of the receiver portion. An eye mask test is then applied to the output signal. Based on a result of the eye mask test, one or more parameters of the transmitter may be adjusted.

摘要翻译： 公开了使用软接收机屏蔽技术的通信系统优化。 例如，用于测试通信设备的方法包括获得给定通信设备的接收机部分的软件表示。 然后处理从发射机通过给定链路信道接收的数据信号，其中使用通信设备的接收机部分的软件表示来执行处理步骤。 由接收器部分的软件表示产生输出信号。 然后将眼罩测试应用于输出信号。 基于眼罩测试的结果，可以调整发射器的一个或多个参数。

公开(公告)号：US07882404B2

公开(公告)日：2011-02-01

申请号：US11935759

申请日：2007-11-06

申请人： Xingdong Dai ,  Geoffrey Zhang ,  Max J. Olsen

发明人： Xingdong Dai ,  Geoffrey Zhang ,  Max J. Olsen

IPC分类号： G01R31/28

CPC分类号： H04L25/03343 ,  H04L25/0264 ,  H04L25/0286 ,  H04L25/03057 ,  H04L25/4923

摘要： The present invention implements a method and apparatus for using components within a Serializer/DeSerializer (SerDes) to emulate the effects of a backplane in order to facilitate automated test equipment (ATE) testing of the SerDes. The SerDes includes a transmitter pre-emphasis circuit (TPXE) that pre-emphasizes a transmitted signal and a receiver equalization circuit (RXEQ) that equalizes a received signal. The TPXE includes coefficients that are dynamically programmable.

摘要翻译： 本发明实现了使用串行器/解串器（SerDes）内的组件来模拟背板的效果以方便SerDes的自动测试设备（ATE）测试的方法和装置。 SerDes包括预先强调发射信号的发射机预加重电路（TPXE）和均衡接收信号的接收机均衡电路（RXEQ）。 TPXE包括可动态编程的系数。

公开(公告)号：US20100027606A1

公开(公告)日：2010-02-04

申请号：US12221003

申请日：2008-07-30

申请人： Xingdong Dai ,  Geoffrey Zhang ,  Max Olsen ,  Dwight Daugherty

发明人： Xingdong Dai ,  Geoffrey Zhang ,  Max Olsen ,  Dwight Daugherty

IPC分类号： H03K5/159

CPC分类号： H04L25/03019

摘要： In described embodiments, an adaptive equalizer employed by a receiver in a communication channel, such as Fibre Channel, employs pattern recognition. When a repeating pattern, such as an IDLE or ARBFF pattern, is employed by a standard to, for example, maintain a communication link, an equalizer of the receiver might adaptively set its equalizer parameters based on characteristics of the signal energy of the repeating pattern rather than adaptively set its equalizer parameters based on characteristics of the signal energy of generally random user data carried on the link. Pattern recognition by the receiver allows for maintaining adaptive equalizer parameters at settings preferred for data detection of the typical random data, improving data detection performance of the receiver when the channel transitions from a preset or synchronization repeating pattern to a user random data pattern.

公开(公告)号：US20060099843A1

公开(公告)日：2006-05-11

申请号：US11258710

申请日：2005-10-26

申请人： Todd Fullner ,  Geoffrey Zhang ,  Joseph Marban

发明人： Todd Fullner ,  Geoffrey Zhang ,  Joseph Marban

IPC分类号： H01R13/52

CPC分类号： H01R13/6485 ,  B64D37/005 ,  B64D37/32 ,  B64D45/02 ,  F16L5/12 ,  F16L25/02 ,  F16L25/023

摘要： A dielectric tubular fitting for dissipating electrical energy, while providing fluid flow therethrough, the fitting including coaxial first and second generally tubular light metal housings, with a first, generally cylindrical, spacer of a Peek material composition being sealingly interposed therebetween and a first generally disc-shaped first ESD (Electrostatic Discharge) spacer, of a Krefine material composition, for controlling the electrical resistance between the first and second housings, being additionally interposed between as well as both axially and radially separating at least the first and second housings, with a tubular insulator housing, of a carbon filled PTFE type material composition, enveloping at least a portion of the first housing. Several embodiments of both in-line and bulkhead type fittings are set forth, one of the latter including frangible screws and an external fracture plane, with an internal controlled weak portion including an internal fracture plane, these fracture planes providing controlled breakaway features.

摘要翻译： 一种用于耗散电能同时提供流体流过其中的电介质管状配件，所述配件包括同轴的第一和第二大体上管状的轻金属外壳，其中Peek材料组合物的第一大致为圆柱形的间隔物密封地插入其间， 用于控制第一和第二壳体之间的电阻的Krefine材料组合物的第一ESD（静电放电）间隔物，另外插入在第一和第二ESD之间以及轴向和径向分离至少第一和第二壳体之间， 管状绝缘体外壳，填充有碳的PTFE型材料组合物，包封第一壳体的至少一部分。 阐述了在线和隔板型配件的几个实施例，其中一个实施例包括易碎螺钉和外部断裂平面，内部受控的弱部分包括内部断裂面，这些断裂面提供受控的分离特征。