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51.发明申请Methods and Apparatus for Detecting a Loss of Lock Condition in a Clock and Data Recovery System 有权用于检测时钟和数据恢复系统中锁定状态丢失的方法和装置公开(公告)号：US20090168936A1
公开(公告)日：2009-07-02
申请号：US11967632
申请日：2007-12-31
IPC分类号： H04L7/00
CPC分类号： H04L7/0062 , H04L7/0083
摘要： Methods and apparatus are provided for detecting a loss of lock condition in a clock and data recovery system. A loss of lock condition is detected in a clock and data recovery system that generates a recovered clock signal from a received signal by sampling the received signal for a plurality of different phases using one or more latches clocked by the recovered clock; evaluating the samples to monitor a data eye associated with the received signal; and detecting the loss of lock condition if the data eye does not satisfy one or more predefined conditions. Generally, the predefined conditions identify a loss of the data eye (e.g, when the data eye cannot be substantially detected), for example, based on a degree of opening of the data eye. The clock and data recovery system can optionally be restarted if the loss of lock condition is detected.
摘要翻译： 提供了用于检测时钟和数据恢复系统中的锁定状况的损失的方法和装置。 在时钟和数据恢复系统中检测到锁定状态的损失，该系统通过使用由恢复时钟计时的一个或多个锁存器对接收到的信号进行多个不同相位的采样来产生来自接收信号的恢复时钟信号; 评估样本以监测与接收信号相关联的数据眼; 并且如果数据眼不满足一个或多个预定条件，则检测锁定条件的损失。 通常，预定条件识别数据眼的损失（例如，当数据眼不能被基本上被检测时），例如，基于数据眼的打开程度。 如果检测到锁定状态的丢失，则可以可选地重新启动时钟和数据恢复系统。
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52.发明申请公开(公告)号：US20090110046A1
公开(公告)日：2009-04-30
申请号：US11930814
申请日：2007-10-31
IPC分类号： H03K5/159
CPC分类号： H04L25/0262 , H04L25/03006 , H04L25/03057 , H04L2025/03375 , H04L2025/03535 , H04L2025/03726
摘要： Methods and apparatus are provided for equalizing a received signal. A received signal is equalized by updating one or more equalization parameters; and discarding the updated equalization parameters if one or more predefined qualifier conditions are detected during the equalizing step. The received signal can optionally be equalized using the updated equalization parameters if the predefined qualifier conditions are not detected during the equalizing step. The updated equalization parameters can optionally be stored if the one or more predefined qualifier conditions are not detected during the equalizing step
摘要翻译： 提供了用于均衡接收信号的方法和装置。 通过更新一个或多个均衡参数来使接收信号相等; 以及如果在均衡步骤期间检测到一个或多个预定义的限定条件，则丢弃所述更新的均衡参数。 如果在平衡步骤期间未检测到预定义的限定条件，则可以使用更新的均衡参数来选择性地均衡所接收的信号。 如果在均衡步骤期间未检测到一个或多个预定义限定条件，则可以可选地存储更新的均衡参数
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53.发明申请Method and apparatus for non-linear decision-feedback equalization in the presence of asymmetric channel 有权在存在非对称信道的情况下进行非线性判决反馈均衡的方法和装置公开(公告)号：US20080080609A1
公开(公告)日：2008-04-03
申请号：US11541379
申请日：2006-09-29
IPC分类号： H03H7/30
CPC分类号： H04L25/03057 , H04B10/695
摘要： Methods and apparatus are provided for determining the threshold position of one or more latches employed for decision-feedback equalization in the presence of a non-linear channel. A latch employed by a decision-feedback equalizer is positioned by constraining input data such that the input data only contains transitions from a first binary value; obtaining a plurality of samples of a single-sided data eye associated with the constrained input data; determining a threshold position of the latch based on the samples; and transforming the determined position to address the non-linearity of the channel. For example, a non-linear mapping table can map measured threshold values to transformed threshold values based on distance.
摘要翻译： 提供了用于在存在非线性通道的情况下确定用于判决反馈均衡的一个或多个锁存器的阈值位置的方法和装置。 由判决反馈均衡器采用的锁存器通过约束输入数据来定位，使得输入数据仅包含来自第一二进制值的转换; 获得与所述约束输入数据相关联的单面数据眼睛的多个样本; 基于所述样本确定所述锁存器的阈值位置; 并且变换确定的位置以解决信道的非线性。 例如，非线性映射表可以将测量的阈值映射到基于距离的变换的阈值。
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54.发明申请Method and apparatus for determining one or more channel compensation parameters based on data eye monitoring 有权用于基于数据眼睛监测来确定一个或多个信道补偿参数的方法和装置公开(公告)号：US20070268984A1
公开(公告)日：2007-11-22
申请号：US11434687
申请日：2006-05-16
IPC分类号： H04B15/00
CPC分类号： H04L25/03343 , H04L1/205 , H04L2025/03681 , H04L2025/03802
摘要： Methods and apparatus are provided for determining one or more channel compensation parameters based on data eye monitoring. According to one aspect of the invention, a method is provided for evaluating the quality of a data eye associated with a signal. The received signal is sampled for a plurality of different phases, for example, using at least two latches, and the samples are evaluated to identify when the signal crosses a predefined amplitude value, such as a zero crossing. It is determined whether the points of predefined amplitude crossing satisfy one or more predefined criteria. One or more parameters of one or more channel compensation techniques can optionally be adjusted based on a result of the determining step. One or more parameters of an adjacent transmitter can also be adjusted to reduce near end cross talk based on a result of the determining step.
摘要翻译： 提供了用于基于数据眼睛监测来确定一个或多个信道补偿参数的方法和装置。 根据本发明的一个方面，提供了一种用于评估与信号相关联的数据眼的质量的方法。 接收到的信号对于多个不同的相位进行采样，例如使用至少两个锁存器，并且评估样本以识别信号何时跨越预定义的幅度值，例如零交叉。 确定预定义的幅度交叉点是否满足一个或多个预定标准。 一个或多个信道补偿技术的一个或多个参数可以根据确定步骤的结果来任意地进行调整。 也可以根据确定步骤的结果，调整相邻发射机的一个或多个参数以减少近端串扰。
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55.发明授权Method and apparatus for integral state initialization and quality of lock monitoring in a clock and data recovery system 有权用于整体状态初始化的方法和装置以及时钟和数据恢复系统中锁定监视的质量公开(公告)号：US07792234B2
公开(公告)日：2010-09-07
申请号：US11414521
申请日：2006-04-28
CPC分类号： H03L7/0807 , H03L7/087 , H03L7/093 , H04L7/0004 , H04L7/0331
摘要： Methods and apparatus are provided for improving the performance of second order CDR systems. The integral state of the CDR system is initialized to a value that is based on an expected frequency profile that may be known a priori for certain applications. One or more quality of lock (QOL) metrics are also monitored that are derived from the integral register state value. A quality of a locking between a received signal and a local clock generated by a Clock and Data Recovery (CDR) system is evaluated by monitoring a state value of an integral register in a digital loop filter of the CDR system; evaluating one or more predefined criteria based on the integral register state value; and identifying a poor lock condition if the one or more predefined criteria are not satisfied.
摘要翻译： 提供了用于提高二级CDR系统的性能的方法和装置。 CDR系统的整体状态被初始化为基于对于某些应用可以是先验已知的预期频率分布的值。 还监视从积分寄存器状态值导出的一个或多个锁定质量（QOL）度量。 通过监视CDR系统的数字环路滤波器中的积分寄存器的状态值来评估由时钟和数据恢复（CDR）系统产生的接收信号和本地时钟之间的锁定的质量; 基于积分寄存器状态值来评估一个或多个预定标准; 并且如果不满足一个或多个预定标准，则识别差的锁定条件。
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56.发明授权Method and apparatus for integral state initialization and quality of lock monitoring in a clock and data recovery system 有权用于整体状态初始化的方法和装置以及时钟和数据恢复系统中锁定监视的质量公开(公告)号：US08416907B2
公开(公告)日：2013-04-09
申请号：US12846390
申请日：2010-07-29
CPC分类号： H03L7/0807 , H03L7/087 , H03L7/093 , H04L7/0004 , H04L7/0331
摘要： Methods and apparatus are provided for improving the performance of second order CDR systems. The integral state of the CDR system is initialized to a value that is based on an expected frequency profile that may be known a priori for certain applications. One or more quality of lock (QOL) metrics are also monitored that are derived from the integral register state value. A quality of a locking between a received signal and a local clock generated by a Clock and Data Recovery (CDR) system is evaluated by monitoring a state value of an integral register in a digital loop filter of the CDR system; evaluating one or more predefined criteria based on the integral register state value; and identifying a poor lock condition if the one or more predefined criteria are not satisfied.
摘要翻译： 提供了用于提高二级CDR系统的性能的方法和装置。 CDR系统的整体状态被初始化为基于对于某些应用可以是先验已知的预期频率分布的值。 还监视从积分寄存器状态值导出的一个或多个锁定质量（QOL）度量。 通过监视CDR系统的数字环路滤波器中的积分寄存器的状态值来评估由时钟和数据恢复（CDR）系统产生的接收信号和本地时钟之间的锁定的质量; 基于积分寄存器状态值来评估一个或多个预定标准; 并且如果不满足一个或多个预定标准，则识别差的锁定条件。
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公开(公告)号：US08027409B2
公开(公告)日：2011-09-27
申请号：US11962409
申请日：2007-12-21
IPC分类号： H03K9/00
CPC分类号： H04L25/03057 , H03K5/135 , H03M9/00
摘要： In an exemplary embodiment, noise prediction-based data detection is described with respect to a SERDES (serializer/deserializer) backplane primary channel subject to inter-symbol interference (ISI) noise and added cross-talk noise from other channels. Noise prediction-based data detection combines an added error component from inter-symbol interference (ISI) noise and an added error component from cross-talk noise into an overall noise prediction error term and cancels effects of residual ISI and cross-talk for various components of the exemplary embodiment.
摘要翻译： 在示例性实施例中，关于经由符号间干扰（ISI）噪声的SERDES（串行器/解串行器）背板主信道和来自其他信道的增加的串扰噪声来描述基于噪声预测的数据检测。 基于噪声预测的数据检测将来自符号间干扰（ISI）噪声的附加误差分量和来自串扰噪声的附加误差分量组合成总体噪声预测误差项，并消除各种组件的残留ISI和串扰的影响 的示例性实施例。
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58.发明授权Method and apparatus for generation of asynchronous clock for spread spectrum transmission 有权用于产生扩频传输的异步时钟的方法和装置公开(公告)号：US07787515B2
公开(公告)日：2010-08-31
申请号：US11353431
申请日：2006-02-14
申请人： Mohammad S. Mobin , Gregory W. Sheets , Vladimir Sindalovsky , William B. Wilson , Craig B. Ziemer
发明人： Mohammad S. Mobin , Gregory W. Sheets , Vladimir Sindalovsky , William B. Wilson , Craig B. Ziemer
IPC分类号： H04B1/00
CPC分类号： H04L27/0014 , H04B1/7075 , H04L2027/0036
摘要： A circuit for spread spectrum rate control uses a first interpolator to phase interpolate between a first signal and a second signal and generate a first output signal based on a first control signal. A second interpolator is utilized to phase interpolate between a third signal and a fourth signal and generate a second output signal based on a second control signal. A multiplexer is used to select, based on a select signal, the first output signal or the second output signal as a spread spectrum clock (SSCLK). A leap-frog interpolator control is used to generate, in synchronism with the SSCLK, the first control signal based on a first type of phase adjustment request, the second control signal based on a second type of phase adjustment request, and the select signal to switch the multiplexer between the first output signal and the second output signal after allowing for an interpolator settling time when changing the first control signal or the second control signal.
摘要翻译： 用于扩频率控制的电路使用第一内插器在第一信号和第二信号之间进行相位插值，并且基于第一控制信号产生第一输出信号。 第二内插器用于在第三信号和第四信号之间进行相位插值，并且基于第二控制信号产生第二输出信号。 多路复用器用于基于选择信号选择第一输出信号或第二输出信号作为扩频时钟（SSCLK）。 跳跃内插器控制用于与SSCLK同步地产生基于第一类型的相位调整请求的第一控制信号，基于第二类型的相位调整请求的第二控制信号，以及选择信号 在改变第一控制信号或第二控制信号之后允许内插器稳定时间之后，在第一输出信号和第二输出信号之间切换多路复用器。
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59.发明申请公开(公告)号：US20100026378A1
公开(公告)日：2010-02-04
申请号：US12364918
申请日：2009-02-03
申请人： James C. Parker , Vishwas M. Rao , Clayton E. Schneider, JR. , Gregory W. Sheets , Prasad Subbarao
发明人： James C. Parker , Vishwas M. Rao , Clayton E. Schneider, JR. , Gregory W. Sheets , Prasad Subbarao
CPC分类号： G06F17/505 , G01R31/31725 , G06F1/04 , G06F1/26 , G06F1/3203 , G06F17/5081 , H03K19/215
摘要： Various embodiments of methods of designing an integrated circuit (IC). One embodiment of one such method includes: (1) generating a functional design for the IC, (2) determining performance objectives for the IC, (3) determining an optimization target voltage for the IC, (4) determining whether the IC needs voltage scaling to achieve the performance objectives at the optimization target voltage and, if so, whether the IC is to employ static voltage scaling or adaptive voltage scaling, (5) using the optimization target voltage to implement a layout from the functional IC design that meets the performance objectives and (6) performing a timing signoff of the layout at the optimization target voltage.
摘要翻译： 设计集成电路（IC）的方法的各种实施例。 一种这样的方法的一个实施例包括：（1）产生IC的功能设计，（2）确定IC的性能目标，（3）确定IC的优化目标电压，（4）确定IC是否需要电压 缩放以实现优化目标电压下的性能目标，如果是，是采用静态电压缩放还是采用自适应电压调整，（5）使用优化目标电压来实现功能IC设计中符合 性能目标和（6）在优化目标电压下执行布局的定时签出。
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公开(公告)号：US08332528B2
公开(公告)日：2012-12-11
申请号：US12273128
申请日：2008-11-18
IPC分类号： G06F15/16
CPC分类号： H04N7/165 , H04N21/25808 , H04N21/26241 , H04N21/2625 , H04N21/41407 , H04N21/4143 , H04N21/4334
摘要： A communication system that enables a specified end-user device to obtain a media file corresponding to a delayed-play entry of a content-definition table prior to the scheduled play time. To deliver the media file to the end user, a service provider requests and receives the corresponding content from a content provider, generates the media file based on the received content, and temporarily stores the media file in a storage unit associated with the service provider. The service provider then breaks the media file into a plurality of data frames and transmits them to the end-user device during an appropriate delivery-opportunity window for storage in local storage unit (e.g., a hard drive) associated with the end-user device. At the play time, the service provider transmits to the end-user device a media-activation packet to initiate rendering thereat a copy of the media file assembled from the data frames stored in the local storage unit.
摘要翻译： 一种通信系统，其使所指定的最终用户设备在所述预定播放时间之前获得与所述内容定义表的延迟播放条目相对应的媒体文件。 为了将媒体文件传送到最终用户，服务提供商从内容提供商请求并接收对应的内容，基于接收到的内容生成媒体文件，并将媒体文件临时存储在与服务提供商相关联的存储单元中。 然后，服务提供商将媒体文件分解成多个数据帧，并在适当的递送机会窗口期间将其传送到终端用户设备，以便存储在与最终用户设备相关联的本地存储单元（例如，硬盘驱动器）中 。 在播放时，服务提供商向最终用户设备发送媒体激活分组，以便从存储在本地存储单元中的数据帧组装的媒体文件的副本开始呈现。
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