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11.发明授权Duty cycle distortion (DCD) jitter modeling, calibration and generation methods 有权占空比失真（DCD）抖动建模，校准和生成方法公开(公告)号：US08125259B2
公开(公告)日：2012-02-28
申请号：US11968942
申请日：2008-01-03
申请人： Xingdong Dai , Weiwei Mao , Max J. Olsen , Geoffrey Zhang
发明人： Xingdong Dai , Weiwei Mao , Max J. Olsen , Geoffrey Zhang
IPC分类号： H03K3/017
摘要： A method and system for modeling and calibrating duty cycle distortion (DCD) of a Serializer and Deserializer (SerDes) device, including first generating a clock DCD signal. Once the clock DCD signal is generated, it is calibrating based upon results obtained from a filtering process of the clock DCD signal. Once the clock DCD signal is calibrated, a data DCD signal is generated and calibrated based upon results obtained from a filtering process of the data DCD signal.
摘要翻译： 一种用于建模和校准串行器和解串器（SerDes）器件的占空比失真（DCD）的方法和系统，包括首先产生时钟DCD信号。 一旦产生时钟DCD信号，它就是根据从时钟DCD信号的滤波处理获得的结果进行校准。 一旦时钟DCD信号被校准，基于从数据DCD信号的滤波处理获得的结果来产生和校准数据DCD信号。
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公开(公告)号：US20100329319A1
公开(公告)日：2010-12-30
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： H04B17/00
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。
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公开(公告)号：US20100329318A1
公开(公告)日：2010-12-30
申请号：US12494771
申请日：2009-06-30
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。
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14.发明申请Methods And Apparatus For Joint Adaptation Of Transmitter Transversal Filter In Communication Devices 有权发射机横向滤波器在通信设备中的联合适应方法和装置公开(公告)号：US20100020860A1
公开(公告)日：2010-01-28
申请号：US12178301
申请日：2008-07-23
IPC分类号： H04L27/01
CPC分类号： H04L25/03343 , H04L25/03057
摘要： Methods and apparatus are provided for joint adaptation of filter values in two communicating devices, such as a link partner and a link device. The disclosed joint adaptation process initially adapts the filter coefficient values in a first of the two communicating devices until a predefined stopping criteria is satisfied. Thereafter, the filter coefficient values in a second of the two communicating devices are adapted once the predefined stopping criteria for the first communicating device is satisfied. The filter coefficient values can comprise coefficient values of a multi-tap filter. The predefined stopping criteria may determine, for example, whether the first of the two communicating devices is overequalized. The filter coefficient values can be determined by including a contribution of only certain cursor tap values of the channel impulse response.
摘要翻译： 提供了用于在诸如链路伙伴和链路设备的两个通信设备中联合适配过滤器值的方法和装置。 所公开的联合适应过程最初适应两个通信设备中的第一个中的滤波器系数值，直到满足预定义的停止标准。 此后，一旦满足了第一通信装置的预定义的停止标准，则适配两个通信装置中的第二个的滤波器系数值。 滤波器系数值可以包括多抽头滤波器的系数值。 预定义的停止标准可以例如确定两个通信设备中的第一个是否被过度预定。 可以通过仅包括信道脉冲响应的某些光标抽头值的贡献来确定滤波器系数值。
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15.发明申请DUTY CYCLE DISTORTION (DCD) JITTER MODELING, CALIBRATION AND GENERATION METHODS 有权占空比失真（DCD）抖动建模，校准和生成方法公开(公告)号：US20090177457A1
公开(公告)日：2009-07-09
申请号：US11968942
申请日：2008-01-03
申请人： Xingdong Dai , Weiwei Mao , Max J. Olsen , Geoffrey Zhang
发明人： Xingdong Dai , Weiwei Mao , Max J. Olsen , Geoffrey Zhang
IPC分类号： G06G7/62
摘要： A method and system for modeling and calibrating duty cycle distortion (DCD) of a Serializer and Deserializer (SerDes) device, including first generating a clock DCD signal. Once the clock DCD signal is generated, it is calibrating based upon results obtained from a filtering process of the clock DCD signal. Once the clock DCD signal is calibrated, a data DCD signal is generated and calibrated based upon results obtained from a filtering process of the data DCD signal.
摘要翻译： 一种用于建模和校准串行器和解串器（SerDes）器件的占空比失真（DCD）的方法和系统，包括首先产生时钟DCD信号。 一旦产生时钟DCD信号，它就是根据从时钟DCD信号的滤波处理获得的结果进行校准。 一旦时钟DCD信号被校准，基于从数据DCD信号的滤波处理获得的结果来产生和校准数据DCD信号。
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公开(公告)号：US07447965B2
公开(公告)日：2008-11-04
申请号：US11121164
申请日：2005-05-03
申请人： Robert D. Brink , James Walter Hofmann, Jr. , Max J. Olsen , Gary E. Schiessler , Lane A. Smith
发明人： Robert D. Brink , James Walter Hofmann, Jr. , Max J. Olsen , Gary E. Schiessler , Lane A. Smith
CPC分类号： H04L1/244
摘要： Communications equipment can be tested using a test pattern encapsulated within a frame, and offsetting the test pattern in each successive frame. In equipment having a number of data latches receiving serial input, the introduction of the offset allows each latch, over time, to be exposed to the same pattern as the other latches. That is, the latches “see” different portions of the pattern at a given time, but over time, each can be exposed to the full pattern. Otherwise, each latch would “see” its own static pattern, different from the other latches, but the same over time with respect to itself. The offset can enhance diagnostic capabilities of the test pattern.
摘要翻译： 可以使用封装在帧内的测试图案来测试通信设备，并且在每个连续帧中抵消测试模式。 在具有接收串行输入的多个数据锁存器的设备中，引入偏移允许每个锁存器随时间暴露于与其他锁存器相同的模式。 也就是说，锁定器在给定时间“看到”图案的不同部分，但是随着时间的推移，每个可以暴露于完整图案。 否则，每个锁存器将“看到”其自己的静态模式，与其他锁存器不同，但是相对于自身而言随着时间的推移相同。 该偏移可以增强测试图案的诊断功能。
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公开(公告)号：US07272756B2
公开(公告)日：2007-09-18
申请号：US11121152
申请日：2005-05-03
申请人： Robert D. Brink , James Walter Hofmann, Jr. , Max J. Olsen , Gary E. Schiessler , Lane A. Smith
发明人： Robert D. Brink , James Walter Hofmann, Jr. , Max J. Olsen , Gary E. Schiessler , Lane A. Smith
IPC分类号： G01R31/28
摘要： Communications equipment can be tested using a test pattern that is modified compared to, and more exploitive than, a standard test pattern. Test patterns can be employed that have lengthened or shortened consecutive identical digit (CID) portions, or that have lengthened or shortened pseudo random bit sequence (PRBS) portions. In some cases, PRBS polynomials are not re-seeded after each CID. Further, different order polynomials can be employed for different applications. Exemplary applications can include test equipment and built-in self-test capability for integrated circuits.
摘要翻译： 通信设备可以使用与标准测试模式相比修改的测试模式进行测试，并且比标准测试模式更具有潜力。 可以采用具有延长或缩短连续相同数字（CID）部分或具有延长或缩短的伪随机位序列（PRBS）部分的测试模式。 在某些情况下，在每个CID之后，PRBS多项式不再重播。 此外，不同的阶多项式可以用于不同的应用。 示例性应用可以包括测试设备和用于集成电路的内置自检能力。
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