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1. 发明申请

WO2008118714A2 CIRCUITS, METHODS AND SYSTEMS FOR LOSS-OF-SIGNAL DETECTION AND EQUALIZATION 审中-公开
标题翻译：信号失真检测和均衡的电路，方法和系统
公开(公告)号：WO2008118714A2
公开(公告)日：2008-10-02
申请号：PCT/US2008/057497
申请日：2008-03-19
申请人： RAMBUS INCORPORATED , LEIBOWITZ, Brian, S. , GARLEPP, Bruno, W. , WERNER, Carl, W. , CHEN, Fred, F.
发明人： LEIBOWITZ, Brian, S. , GARLEPP, Bruno, W. , WERNER, Carl, W. , CHEN, Fred, F.
CPC分类号： H04L25/03019 , H04L25/03057 , H04L2025/0349 , H04L2025/03694
摘要： A circuit, among other embodiments, includes a combined receiver (sampler), equalizer, adaptive engine (correlator), and LOS circuit. An equalizer circuit provides equalized input signals to the receiver circuit, which outputs data values. The LOS circuit outputs a signal that represents a LOS state when one or more equalized signals fall below an adjustable signal VOffset (or threshold sampling signal). When a LOS state is detected, the adaptation of equalization coefficients is halted until the LOS state is no longer detected, so that the equalizer coefficients will not diverge because of erroneously obtained data values during a LOS state. When a LOS state is not detected, adaptation of equalization coefficients based on received data and error values is allowed to proceed. In one embodiment, portions of the LOS circuit and the adaptive engine circuit are combined. In such an embodiment, adaptation of equalizer coefficients are adjusted based on the received data and error values while the LOS circuit is disabled and LOS status is determined when the adaptive engine is disabled. The adaptive engine is temporarily enabled after the LOS status is determined to be negative (a valid signal is present at the receiver).
摘要翻译：除了其它实施例之外，电路包括组合接收器（采样器），均衡器，自适应引擎（相关器）和LOS电路。均衡器电路向接收器电路提供均衡的输入信号，其输出数据值。当一个或多个均衡信号低于可调信号VOffset（或阈值采样信号）时，LOS电路输出表示LOS状态的信号。当检测到LOS状态时，停止对均衡系数的适应，直到不再检测到LOS状态，使得均衡器系数在LOS状态期间由于错误地获得的数据值而不会发散。当未检测到LOS状态时，允许基于接收数据和误差值的均衡系数的适应性进行。在一个实施例中，组合LOS电路和自适应发动机电路的部分。在这样的实施例中，在LOS电路被禁用的同时基于所接收的数据和误差值来调节均衡器系数的适配，并且当禁用自适应引擎时确定LOS状态。在LOS状态被确定为负值（接收机上存在有效信号）之后，自适应引擎被暂时使能。

2. 发明申请

WO2006078845A3 HIGH-SPEED SIGNALING SYSTEMS WITH ADAPTABLE PRE-EMPHASIS AND EQUALIZATION 审中-公开
标题翻译：具有适应性前瞻性和均衡性的高速信号系统
公开(公告)号：WO2006078845A3
公开(公告)日：2007-02-15
申请号：PCT/US2006001944
申请日：2006-01-20
申请人： RAMBUS INC , ZERBE JARED L , CHEN FRED F , HO ANDREW , FARJAD-RAD RAMIN , POULTON JOHN W , DONNELLY KEVIN S , LEBOWITZ BRIAN
发明人： ZERBE JARED L , CHEN FRED F , HO ANDREW , FARJAD-RAD RAMIN , POULTON JOHN W , DONNELLY KEVIN S , LEBOWITZ BRIAN
IPC分类号： H04L25/03
CPC分类号： H04L27/01 , H04L1/0026 , H04L7/0025 , H04L7/0087 , H04L7/0337 , H04L25/0272 , H04L25/028 , H04L25/03057 , H04L25/03343 , H04L25/03885 , H04L25/497 , H04L2025/03503 , H04W52/20 , H04W52/225 , Y02B60/50
摘要： A signaling system includes a pre-emphasizing transmitter and an equalizing receiver coupled to one another via a high-speed signal path. The receiver measures the quality of data conveyed from the transmitter. A controller uses this information and other information to adaptively establish appropriate transmit pre-emphasis and receive equalization settings, e.g. to select the lowest power setting for which the signaling system provides some minimum communication bandwidth without exceeding a desired bit-error rate.
摘要翻译：一个信令系统包括一个预先强调的发射机和一个通过高速信号路径相互耦合的均衡接收机。接收机测量从发射机传送的数据的质量。控制器使用该信息和其他信息来自适应地建立适当的发送预加重和接收均衡设置，例如，选择信令系统提供一些最小通信带宽而不超过所需误码率的最低功率设置。

3. 发明申请

WO2006078845A2 HIGH-SPEED SIGNALING SYSTEMS WITH ADAPTABLE PRE-EMPHASIS AND EQUALIZATION 审中-公开
标题翻译：具有适应性前瞻性和均衡性的高速信号系统
公开(公告)号：WO2006078845A2
公开(公告)日：2006-07-27
申请号：PCT/US2006/001944
申请日：2006-01-20
申请人： RAMBUS INC. , ZERBE, Jared L. , CHEN, Fred F. , HO, Andrew , FARJAD-RAD, Ramin , POULTON, John W. , DONNELLY, Kevin S , LEBOWITZ, Brian
发明人： ZERBE, Jared L. , CHEN, Fred F. , HO, Andrew , FARJAD-RAD, Ramin , POULTON, John W. , DONNELLY, Kevin S , LEBOWITZ, Brian
IPC分类号： H04L25/03
CPC分类号： H04L27/01 , H04L1/0026 , H04L7/0025 , H04L7/0087 , H04L7/0337 , H04L25/0272 , H04L25/028 , H04L25/03057 , H04L25/03343 , H04L25/03885 , H04L25/497 , H04L2025/03503 , H04W52/20 , H04W52/225 , Y02D70/00
摘要： A signaling system includes a pre-emphasizing transmitter and an equalizing receiver coupled to one another via a high-speed signal path. The receiver measures the quality of data conveyed from the transmitter. A controller uses this information and other information to adaptively establish appropriate transmit pre-emphasis and receive equalization settings, e.g. to select the lowest power setting for which the signaling system provides some minimum communication bandwidth without exceeding a desired bit-error rate.
摘要翻译：一个信令系统包括一个预先强调的发射机和一个通过高速信号路径相互耦合的均衡接收机。接收机测量从发射机传送的数据的质量。控制器使用该信息和其他信息来自适应地建立适当的发送预加重和接收均衡设置，例如，选择信令系统提供一些最小通信带宽而不超过所需误码率的最低功率设置。

4. 发明申请

WO2005062469A1 NOISE-TOLERANT SIGNALING SCHEMES SUPPORTING SIMPLIFIED TIMING AND DATA RECOVERY 审中-公开
标题翻译：支持简化时序和数据恢复的噪声信令方案
公开(公告)号：WO2005062469A1
公开(公告)日：2005-07-07
申请号：PCT/US2004/040483
申请日：2004-12-03
申请人： RAMBUS, INC. , HO, Andrew , STOJANOVIC, Vladimir , CHEN, Fred, F. , ALON, Elad , HOROWITZ, Mark, A.
发明人： HO, Andrew , STOJANOVIC, Vladimir , CHEN, Fred, F. , ALON, Elad , HOROWITZ, Mark, A.
IPC分类号： H03K19/003
CPC分类号： H04L47/10 , H04L5/20 , H04L25/0276
摘要： Described are communication systems that convey differential and common-mode signals over the same differential channel. Noise-tolerant communication schemes use low-amplitude common-mode signals that are easily refected by differential receivers thus allowing for very high differential data rates. Some embodiments employ the common-mode signals to transmit bacchanal signals for adjusting the characteristics of the differential transmitter. Backchannel control signals are effectively conveyed even if the forward channel transmitter is so maladjusted that the received differential data is unrecognizable. Systems in accordance with the above-described embodiments obtain these advantages without additional pins or communications channels, and are compatible with both AC-coupled and DC-coupled communications channels. Data coding schemes and corresponding data recovery circuits eliminate the need for complex, high-speed CDR circuits.
摘要翻译：描述了通过相同的差分通道传送差分和共模信号的通信系统。耐噪声通信方案使用易于被差分接收机反射的低幅度共模信号，从而允许非常高的差分数据速率。一些实施例采用共模信号来传输用于调整差分发射机的特性的机构信号。即使前向信道发射机被调整不正确，接收到的差分数据是无法识别的，反向信道控制信号也被有效地传送。根据上述实施例的系统在没有附加引脚或通信信道的情况下获得这些优点，并且与AC耦合和DC耦合通信信道兼容。数据编码方案和相应的数据恢复电路不需要复杂的高速CDR电路。

5. 发明申请

WO2005046156A3 TRANSPARENT MULTI-MODE PAM INTERFACE 审中-公开
公开(公告)号：WO2005046156A3
公开(公告)日：2005-05-19
申请号：PCT/US2004/035990
申请日：2004-10-26
申请人： RAMBUS INC. , ZERBE, Jared, L. , WERNER, Carl, W. , STONECYPHER, William, F. , CHEN, Fred, F.
发明人： ZERBE, Jared, L. , WERNER, Carl, W. , STONECYPHER, William, F. , CHEN, Fred, F.
IPC分类号： H04L1/00 , H04L5/14 , H04L25/02 , H04L25/03 , H04L25/49 , H04L27/08
摘要： Provided are a method and apparatus for high-speed, multi-mode PAM symbol transmission. A multi-mode PAM output driver drives one or more symbols, the number of levels used in the PAM modulation of the one or more symbols depending on the state of a PAM mode signal. Additionally, the one or more symbols are driven at a symbol rate, the symbol rate selected in accordance with the PAM mode signal so that a data rate of the driven symbols in constant with respect to changes in the state of the PAM mode signal. Further provided are methods for determining the optimal number of PAM levels for symbol transmission and reception in a given physical environment.

6. 发明申请

WO2007024815A2 SIGNALING SYSTEM WITH DATA CORRELATION DETECTION 审中-公开
标题翻译：具有数据相关检测的信号系统
公开(公告)号：WO2007024815A2
公开(公告)日：2007-03-01
申请号：PCT/US2006/032687
申请日：2006-08-21
申请人： RAMBUS INC. , STOJANOVIC, Vladimir, M. , HO, Andrew , CHEN, Fred, F. , LI, Simon
发明人： STOJANOVIC, Vladimir, M. , HO, Andrew , CHEN, Fred, F. , LI, Simon
CPC分类号： H04L25/03006
摘要： Conditionally updating equalization tap weights within an equalized signaling system based on a measure of correlation that indicates a difference between the number of received data values that have matching bits at a first pair of predetermined bit positions, and the number of received data values that have non-matching bits at the first pair of predetermined bit positions.
摘要翻译：基于指示在第一对预定比特位置具有匹配比特的接收数据值的数目之间的差异的相关性测量值以及具有非均衡信令系统的接收数据值的数量，在均衡信令系统内有条件地更新均衡抽头权重 - 在第一对预定位位置匹配位。

7. 发明申请

WO2007016274A2 RAM-DAC FOR TRANSMIT PREEMPHASIS 审中-公开
标题翻译：用于传输预留的RAM-DAC
公开(公告)号：WO2007016274A2
公开(公告)日：2007-02-08
申请号：PCT/US2006029241
申请日：2006-07-25
申请人： RAMBUS INC , HO ANDREW , CHEN FRED F , ZERBE JARED L
发明人： HO ANDREW , CHEN FRED F , ZERBE JARED L
IPC分类号： H04L25/03
CPC分类号： H04L25/03834 , H03H17/0294
摘要： Described are transmitters with RAM-DAC based pre-emphasis filters that can be updated adaptively without interfering with data transmission. The memory within the RAM- DAC is divided into active and inactive memory locations, in which active memory locations are those to be accessed in the near future, and consequently cannot be updated (written to) at a given time due without inducing a read/write conflict. One embodiment monitors incoming memory addresses to find an adequate time window for a write to take place without a read interference. Another embodiment includes two memory blocks with similar address space, one of which may be updated as the other is used to for data transmission. Some embodiments employ a RAM-DAC with reduced memory size and complexity.
摘要翻译：描述的是具有基于RAM-DAC的预加重滤波器的发射器，其可以自适应地更新而不干扰数据传输。 RAM-DAC内的存储器被分为有源和非活动存储器位置，其中有效存储器位置是在不久的将来被访问的存储器位置，因此不能在给定时间更新（写入），而不引起读/ 写冲突。一个实施例监视进入的存储器地址以找到足够的时间窗口，以便在没有读取干扰的情况下进行写入。另一个实施例包括具有相似地址空间的两个存储器块，其中之一可以被更新，而另一个用于数据传输。一些实施例采用具有减小的存储器大小和复杂度的RAM-DAC。

8. 发明申请

WO2005060193A2 HIGH SPEED SIGNALING SYSTEM WITH ADAPTIVE TRANSMIT PRE-EMPHASIS, REFLECTION CANCELLATION AND OFFSET CANCELLATION 审中-公开
标题翻译：具有自适应发射预先激活的高速信号系统，反射消除和偏移消除
公开(公告)号：WO2005060193A2
公开(公告)日：2005-06-30
申请号：PCT/US2004/042195
申请日：2004-12-16
申请人： RAMBUS INC. , STOJANOVIC, Vladimir, M. , HO, Andrew , BESSIOS, Anthony , CHEN, Fred, F. , ALON, Elad , HOROWITZ, Mark, A. , GARLEPP, Bruno, W.
发明人： STOJANOVIC, Vladimir, M. , HO, Andrew , BESSIOS, Anthony , CHEN, Fred, F. , ALON, Elad , HOROWITZ, Mark, A. , GARLEPP, Bruno, W.
IPC分类号： H04L25/49
CPC分类号： H04L25/03057 , H04L25/028 , H04L25/0292 , H04L25/03343 , H04L25/061 , H04L25/4906

9. 发明申请

WO2005046156A2 TRANSPARENT MULTI-MODE PAM INTERFACE 审中-公开
标题翻译：透明多模式接口
公开(公告)号：WO2005046156A2
公开(公告)日：2005-05-19
申请号：PCT/US2004035990
申请日：2004-10-26
申请人： RAMBUS INC , ZERBE JARED L , WERNER CARL W , STONECYPHER WILLIAM F , CHEN FRED F
发明人： ZERBE JARED L , WERNER CARL W , STONECYPHER WILLIAM F , CHEN FRED F
IPC分类号： H04L1/00 , H04L5/14 , H04L25/02 , H04L25/03 , H04L25/49 , H04L27/08 , H04L27/32
CPC分类号： H04L27/08 , H04L1/0003 , H04L5/1438 , H04L25/028 , H04L25/0292 , H04L25/4917 , H04L2025/03585
摘要： Provided are a method and apparatus for high-speed, multi-mode PAM symbol transmission. A multi-mode PAM output driver drives one or more symbols, the number of levels used in the PAM modulation of the one or more symbols depending on the state of a PAM mode signal. Additionally, the one or more symbols are driven at a symbol rate, the symbol rate selected in accordance with the PAM mode signal so that a data rate of the driven symbols in constant with respect to changes in the state of the PAM mode signal. Further provided are methods for determining the optimal number of PAM levels for symbol transmission and reception in a given physical environment.
摘要翻译：提供了一种用于高速，多模式PAM符号传输的方法和装置。多模式PAM输出驱动器根据PAM模式信号的状态驱动一个或多个符号，用于一个或多个符号的PAM调制中使用的级别数。另外，一个或多个符号以符号率被驱动，符号速率是根据PAM模式信号选择的符号速率，使得驱动符号的数据速率相对于PAM模式信号的状态的变化是恒定的。还提供了用于在给定物理环境中确定用于符号传输和接收的PAM最优数量的方法。

10. 发明申请

WO2004105334A3 MARGIN TEST METHODS AND CIRCUITS 审中-公开
标题翻译：测量方法和电路
公开(公告)号：WO2004105334A3
公开(公告)日：2005-06-02
申请号：PCT/US2004015895
申请日：2004-05-20
申请人： RAMBUS INC , GARLEPP BRUNO W , CHEN FRED F , HO ANDREW , STOJANOVIC VLADIMIR
发明人： GARLEPP BRUNO W , CHEN FRED F , HO ANDREW , STOJANOVIC VLADIMIR
IPC分类号： H04L1/20 , H04L1/24 , H04L25/03
CPC分类号： H04L25/03006 , H04L1/20 , H04L1/241 , H04L1/242
摘要： Described are methods and circuits for margin testing digital receivers. Some embodiments prevent margins from collapsing in response to erroneously received data, and can thus be used in receivers that employ historical data to reduce intersymbol interference (ISI). Some embodiments detect receive errors for input data streams of unknown patterns, and can thus be used for in-system margin testing. Such systems can be adapted to dynamically alter system parameters during device operation to maintain adequate margins despite fluctuations in the system noise environment due to e.g. temperature and supply-voltage changes. Also described are methods of plotting and interpreting filtered and unfiltered error data generated by the disclosed methods and circuits. Some embodiments filter error data to facilitate pattern-specific margin testing, while other embodiments rely upon the statistics of sampled data to explore the margin characteristics of received data.
摘要翻译：描述了数字接收机边缘测试的方法和电路。一些实施例可以防止误差响应于错误接收的数据而崩溃，并且因此可用于采用历史数据的接收机中以减少符号间干扰（ISI）。一些实施例检测未知模式的输入数据流的接收错误，因此可以用于系统内边缘测试。这样的系统可以适于在设备操作期间动态地改变系统参数，以保持足够的余量，尽管由于例如系统噪声环境的波动。温度和电源电压变化。还描述了绘制和解释由所公开的方法和电路产生的滤波和未滤波的误差数据的方法。一些实施例对误差数据进行滤波以便于特定于图案的边缘测试，而其他实施例依赖于采样数据的统计来探索接收数据的边缘特性。

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