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公开(公告)号：US20090110045A1
公开(公告)日：2009-04-30
申请号：US11930780
申请日：2007-10-31
IPC分类号： H03K5/159
CPC分类号： H04L25/03057 , H04L25/0262 , H04L2025/03547
摘要： Methods and apparatus are provided fox equalizing a received signal. A received signal is equalized by determining a data rate of the received signal; obtaining one or more equalization parameters associated with the determined data rate; and equalizing the received signal using the obtained one or more equalization parameters. The equalization parameters may comprise, for example, one or more of a gain parameter, zero control for a high pass filter and one or more threshold settings for one or more latches used during the equalizing step, such as data latches or transition latches (or both).
摘要翻译： 提供了均衡接收信号的方法和装置。 接收到的信号通过确定接收信号的数据速率来均衡; 获得与所确定的数据速率相关联的一个或多个均衡参数; 以及使用所获得的一个或多个均衡参数来均衡所接收的信号。 均衡参数可以包括例如增益参数，高通滤波器的零控制和在均衡步骤期间使用的一个或多个锁存器的一个或多个阈值设置中的一个或多个，诸如数据锁存器或转换锁存器（或 都）。
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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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公开(公告)号：US08432959B2
公开(公告)日：2013-04-30
申请号：US11930814
申请日：2007-10-31
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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公开(公告)号：US20090161747A1
公开(公告)日：2009-06-25
申请号：US11962409
申请日：2007-12-21
IPC分类号： H04L27/01
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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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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6.发明申请Methods and Apparatus for Improved Jitter Tolerance in an SFP Limit Amplified Signal 失效用于改善SFP限幅放大信号中抖动容限的方法和装置公开(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。
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7.发明授权Methods and apparatus for improved jitter tolerance in an SFP limit amplified signal 失效用于改善SFP限幅放大信号中抖动容限的方法和装置公开(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
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。
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8.发明授权Methods and apparatus for digital compensation of clock errors for a clock and data recovery circuit 有权用于时钟和数据恢复电路的时钟误差数字补偿的方法和装置公开(公告)号：US07756235B2
公开(公告)日：2010-07-13
申请号：US11540947
申请日：2006-09-29
IPC分类号： H03D3/24
CPC分类号： H03L7/091 , H03L7/0814 , H04L7/0054 , H04L7/0079
摘要： Methods and apparatus are provided for digital compensation of clock timing errors in a VCDL. Clock timing errors in a clock and data recovery system having a voltage controlled delay loop comprised of a plurality of delay elements are compensated for by evaluating a phase of data recovered from an input signal; generating one or more uncompensated clock phase adjustment values based on the phase evaluation; generating one or more compensation terms that compensate for a non-ideal delay for one or more of the delay elements; and determining an adjustment to one or more clock phases produced by the voltage controlled delay loop based on the uncompensated clock phase adjustment values and the one or more compensation terms. The one or more compensation terms can be subtracted from the uncompensated clock phase adjustment values to generate the adjustment to the one or more clock phases.
摘要翻译： 提供了用于VCDL中的时钟定时误差的数字补偿的方法和装置。 具有由多个延迟元件组成的电压控制延迟回路的时钟和数据恢复系统中的时钟定时误差通过评估从输入信号中恢复的数据的相位来进行补偿; 基于相位评估产生一个或多个未补偿的时钟相位调整值; 产生补偿一个或多个延迟元件的非理想延迟的一个或多个补偿项; 以及基于所述未补偿的时钟相位调整值和所述一个或多个补偿项，确定由所述压控延迟环产生的一个或多个时钟相位的调整。 可以从未补偿的时钟相位调整值中减去一个或多个补偿项，以产生对一个或多个时钟相位的调整。
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9.发明申请Methods and apparatus for digital compensation of clock errors for a clock and data recovery circuit 有权用于时钟和数据恢复电路的时钟误差数字补偿的方法和装置公开(公告)号：US20080080657A1
公开(公告)日：2008-04-03
申请号：US11540947
申请日：2006-09-29
IPC分类号： H03D3/24
CPC分类号： H03L7/091 , H03L7/0814 , H04L7/0054 , H04L7/0079
摘要： Methods and apparatus are provided for digital compensation of clock timing errors in a VCDL. Clock timing errors in a clock and data recovery system having a voltage controlled delay loop comprised of a plurality of delay elements are compensated for by evaluating a phase of data recovered from an input signal; generating one or more uncompensated clock phase adjustment values based on the phase evaluation; generating one or more compensation terms that compensate for a non-ideal delay for one or more of the delay elements; and determining an adjustment to one or more clock phases produced by the voltage controlled delay loop based on the uncompensated clock phase adjustment values and the one or more compensation terms. The one or more compensation terms can be subtracted from the uncompensated clock phase adjustment values to generate the adjustment to the one or more clock phases.
摘要翻译： 提供了用于VCDL中的时钟定时误差的数字补偿的方法和装置。 具有由多个延迟元件组成的电压控制延迟回路的时钟和数据恢复系统中的时钟定时误差通过评估从输入信号中恢复的数据的相位来进行补偿; 基于相位评估产生一个或多个未补偿的时钟相位调整值; 产生补偿一个或多个延迟元件的非理想延迟的一个或多个补偿项; 以及基于所述未补偿的时钟相位调整值和所述一个或多个补偿项，确定由所述压控延迟环产生的一个或多个时钟相位的调整。 可以从未补偿的时钟相位调整值中减去一个或多个补偿项，以产生对一个或多个时钟相位的调整。
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10.发明申请Methods And Apparatus For Determining Receiver Filter Coefficients For A Plurality Of Phases 有权用于确定多个相位的接收器滤波器系数的方法和装置公开(公告)号：US20090097541A1
公开(公告)日：2009-04-16
申请号：US11870908
申请日：2007-10-11
申请人： Pervez M. Aziz , Mohammad S. Mobin , Lane A. Smith
发明人： Pervez M. Aziz , Mohammad S. Mobin , Lane A. Smith
IPC分类号： H03H7/30
CPC分类号： H04L1/205
摘要： Methods and apparatus are provided for determining receiver filter coefficients for a plurality of phases. One or more coefficients for a receiver filter are determined by determining a first coefficient for a first phase of a data eye; and determining a second coefficient for a second phase of the data eye. The receiver filter may be, for example, a decision-feedback equalizer. The first and second coefficients may be determined by performing an LMS adaptation of decision-feedback equalization coefficients. In another embodiment, the first and second coefficients may be determined by obtaining eye opening metrics from a data eye monitor corresponding to each of the respective first phase and the second phase; and determining the respective first and second coefficients based on the eye opening metrics. The first and second phases can correspond to odd and even phases.
摘要翻译： 提供了用于确定多个相位的接收机滤波器系数的方法和装置。 通过确定数据眼的第一阶段的第一系数来确定接收机滤波器的一个或多个系数; 以及确定所述数据眼睛的第二阶段的第二系数。 接收机滤波器可以是例如判决反馈均衡器。 可以通过执行判决反馈均衡系数的LMS适应来确定第一和第二系数。 在另一个实施例中，可以通过从对应于相应的第一阶段和第二阶段中的每一个的数据眼睛监视器获得眼睛开度度量来确定第一和第二系数; 以及基于所述眼睛开度度量确定相应的第一和第二系数。 第一和第二相可以对应于奇数和偶数相。
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