公开(公告)号：US07995605B2

公开(公告)日：2011-08-09

申请号：US12782319

申请日：2010-05-18

申请人： Richard G. Thousand ,  Kevin T. Chan ,  Kevin Brown

发明人： Richard G. Thousand ,  Kevin T. Chan ,  Kevin Brown

IPC分类号： H04L12/403

CPC分类号： H04L12/10 ,  H04L12/40078

摘要： The present invention describes a communications system having a first link partner and a second link partner that are connected by a communications link having at least four pairs of conductors. According to IEEE Standard 802.3 (e.g. Ethernet) for 1000Base-T, a data link is maintained (in a period absent data transmission) by sending idle signals over four pairs of conductors of the cable to maintain a logical connection. This idle signal scheme is replaced with an alternate idle signaling scheme that uses only two pairs of conductors to maintain a logical connection and therefore can operate with using lower power. The other two pairs of conductors of the four pairs of conductors are unused to maintain a logical connection absent data transfer, and therefore can be used to implement a Suspend Mode of operation. During Suspend Mode, the physical layer of each link partner powers down unnecessary circuitry so as to operate in a low power environment. To initiate the Suspend Mode, idle signals are sent on one of the un-used pairs of the conductors mentioned above. To exit Suspend mode, idle signals are sent on respective conductors simultaneously.

摘要翻译： 本发明描述了具有通过具有至少四对导体的通信链路连接的第一链路伙伴和第二链路伙伴的通信系统。 根据用于1000Base-T的IEEE标准802.3（例如以太网），通过在电缆的四对导体上发送空闲信号来维持数据链路（在没有数据传输的时段内）以维持逻辑连接。 该空闲信号方案被替换为仅使用两对导线来维持逻辑连接的替代空闲信令方案，因此可以使用较低的功率来操作。 四对导体的另外两对导线未被使用以维持没有数据传输的逻辑连接，因此可用于实现暂停工作模式。 在挂起模式期间，每个链路伙伴的物理层会关闭不必要的电路，以便在低功耗环境中工作。 要启动挂起模式，空闲信号将在上述未使用的一对导线上发送。 要退出挂起模式，空闲信号将同时发送到相应的导体上。

公开(公告)号：US20100226387A1

公开(公告)日：2010-09-09

申请号：US12782319

申请日：2010-05-18

申请人： Richard G. THOUSAND ,  Kevin T. Chan ,  Kevin Brown

发明人： Richard G. THOUSAND ,  Kevin T. Chan ,  Kevin Brown

IPC分类号： H04L12/403

CPC分类号： H04L12/10 ,  H04L12/40078

摘要： The present invention describes a communications system having a first link partner and a second link partner that are connected by a communications link having at least four pairs of conductors. According to IEEE Standard 802.3 (e.g. Ethernet) for 1000Base-T, a data link is maintained (in a period absent data transmission) by sending idle signals over four pairs of conductors of the cable to maintain a logical connection. This idle signal scheme is replaced with an alternate idle signaling scheme that uses only two pairs of conductors to maintain a logical connection and therefore can operate with using lower power. The other two pairs of conductors of the four pairs of conductors are unused to maintain a logical connection absent data transfer, and therefore can be used to implement a Suspend Mode of operation. During Suspend Mode, the physical layer of each link partner powers down unnecessary circuitry so as to operate in a low power environment. To initiate the Suspend Mode, idle signals are sent on one of the un-used pairs of the conductors mentioned above. To exit Suspend mode, idle signals are sent on respective conductors simultaneously.

摘要翻译： 本发明描述了具有通过具有至少四对导体的通信链路连接的第一链路伙伴和第二链路伙伴的通信系统。 根据用于1000Base-T的IEEE标准802.3（例如以太网），通过在电缆的四对导体上发送空闲信号来维持数据链路（在没有数据传输的时段内）以维持逻辑连接。 该空闲信号方案被替换为仅使用两对导线来维持逻辑连接的替代空闲信令方案，因此可以使用较低的功率来操作。 四对导体的另外两对导线未被使用以维持没有数据传输的逻辑连接，因此可用于实现暂停工作模式。 在挂起模式期间，每个链路伙伴的物理层会关闭不必要的电路，以便在低功耗环境中工作。 要启动挂起模式，空闲信号将在上述未使用的一对导线上发送。 要退出挂起模式，空闲信号将同时发送到相应的导体上。

公开(公告)号：US07738482B2

公开(公告)日：2010-06-15

申请号：US10986666

申请日：2004-11-12

申请人： Richard G. Thousand ,  Kevin T. Chan ,  Kevin Brown

发明人： Richard G. Thousand ,  Kevin T. Chan ,  Kevin Brown

IPC分类号： H04L12/403

CPC分类号： H04L12/10 ,  H04L12/40078

摘要： The present invention describes a communications system having a first link partner and a second link partner that are connected by a communications link having at least four pairs of conductors. According to IEEE Standard 802.3 (e.g. Ethernet) for 1000Base-T, a data link is maintained (in a period absent data transmission) by sending idle signals over four pairs of conductors of the cable to maintain a logical connection. This idle signal scheme is replaced with an alternate idle signaling scheme that uses only two pairs of conductors to maintain a logical connection and therefore can operate with using lower power. The other two pairs of conductors of the four pairs of conductors are unused to maintain a logical connection absent data transfer, and therefore can be used to implement a Suspend Mode of operation. During Suspend Mode, the physical layer of each link partner powers down unnecessary circuitry so as to operate in a low power environment. To initiate the Suspend Mode, idle signals are sent on one of the un-used pairs of the conductors mentioned above. To exit Suspend mode, idle signals are sent on respective conductors simultaneously.

摘要翻译： 本发明描述了具有通过具有至少四对导体的通信链路连接的第一链路伙伴和第二链路伙伴的通信系统。 根据用于1000Base-T的IEEE标准802.3（例如以太网），通过在电缆的四对导体上发送空闲信号来维持数据链路（在没有数据传输的时段内）以维持逻辑连接。 该空闲信号方案被替换为仅使用两对导线来维持逻辑连接的替代空闲信令方案，因此可以使用较低的功率来操作。 四对导体的另外两对导体未被使用以维持没有数据传输的逻辑连接，因此可用于实现暂停工作模式。 在挂起模式期间，每个链路伙伴的物理层会关闭不必要的电路，以便在低功耗环境中工作。 要启动挂起模式，空闲信号将在上述未使用的一对导线上发送。 要退出挂起模式，空闲信号将同时发送到相应的导体上。

公开(公告)号：US08422591B2

公开(公告)日：2013-04-16

申请号：US13090379

申请日：2011-04-20

申请人： Oscar E. Agazzi ,  Gottfried Ungerboeck ,  Keshab K. Parhi ,  Christian A. Lutkemeyer ,  Pieter Vorenkamp ,  Kevin T. Chan ,  Myles H. Wakayama

发明人： Oscar E. Agazzi ,  Gottfried Ungerboeck ,  Keshab K. Parhi ,  Christian A. Lutkemeyer ,  Pieter Vorenkamp ,  Kevin T. Chan ,  Myles H. Wakayama

IPC分类号： H04L27/00

CPC分类号： H04L25/4975 ,  H03M1/0604 ,  H03M1/1215 ,  H04L25/03133 ,  H04L25/03146 ,  H04L25/03343 ,  H04L25/497 ,  H04L2025/03503

摘要： Various systems and methods related to equalization precoding in a communications channel are disclosed. In one implementation precoding is performed on signals transmitted over an optical channel. In one implementation precoding and decoding operations are performed in parallel to facilitate high speed processing in relatively low cost circuits. Initialization of the precoders may be realized by transmitting information related to the characteristics of the channel between transceiver pairs.

摘要翻译： 公开了与通信信道中的均衡预编码相关的各种系统和方法。 在一个实现中，对通过光信道发射的信号执行预编码。 在一个实现中，并行执行预编码和解码操作以便于在相对低成本的电路中进行高速处理。 可以通过发送与收发器对之间的信道的特性相关的信息来实现预编码器的初始化。

公开(公告)号：US20110013725A1

公开(公告)日：2011-01-20

申请号：US12858224

申请日：2010-08-17

申请人： Kevin T. Chan

发明人： Kevin T. Chan

IPC分类号： H04L25/03

CPC分类号： H04B3/23 ,  H04B3/32 ,  H04L25/0272 ,  H04L25/085

摘要： A power efficient and reduced electromagnetic interference (EMI) emissions multi-transmitter system for unshielded twisted pair (UTP) data communication applications. For each transmitter, digital transmit data is converted to a current-mode differential signal analog waveform by a digital-to-analog converter (DAC). The output current from each DAC is used to generate the required transmit voltage on the respective UTP line. Timing circuitry staggers the time base of each transmitter to reduce the aggregate EMI emissions of the multi-transmitter system.

摘要翻译： 用于非屏蔽双绞线（UTP）数据通信应用的功率高效和降低的电磁干扰（EMI）发射多发射机系统。 对于每个发射器，数字发射数据由数模转换器（DAC）转换为电流模式差分信号模拟波形。 来自每个DAC的输出电流用于在相应的UTP线路上产生所需的发射电压。 定时电路交错了每个发射机的时基，以减少多发射机系统的总EMI辐射。

公开(公告)号：US07835292B2

公开(公告)日：2010-11-16

申请号：US10612025

申请日：2003-07-02

申请人： Kevin T. Chan

发明人： Kevin T. Chan

IPC分类号： H04L12/28

CPC分类号： H04L1/22

摘要： Aspects of the invention include determining or choosing any usable media pair from all existing media pairs of a first device. Any channel may be selected from all existing channels and the selected channel is chosen so that it is different from a general channel assignment corresponding to the determined usable media pair. The selected channel may be assigned to the media pair. A second device may be notified of the assigned channel which corresponds to the media pair chosen from all the media pairs. The second device may cross-connect a corresponding equivalent channel and media pair. The first and second device may be adapted to negotiate the assignment of the selected channel to any one of the media pairs. Alternatively, a particular channel and media pair assignment may be selected from a plurality of predetermined channel and media pair assignments and utilized by the first and second device.

摘要翻译： 本发明的方面包括确定或选择来自第一设备的所有现有媒体对的任何可用媒体对。 可以从所有现有信道中选择任何信道，并且选择所选择的信道，使得其与对应于所确定的可用媒体对的通用信道分配不同。 可以将所选择的频道分配给媒体对。 可以向第二设备通知与从所有媒体对中选择的媒体对相对应的分配的频道。 第二设备可以交叉连接相应的等效信道和媒体对。 第一和第二设备可以适于协调所选择的频道的分配到媒体对中的任何一个。 或者，可以从多个预定信道和媒体对分配中选择特定信道和媒体对分配，并由第一和第二设备使用。

公开(公告)号：US07769102B2

公开(公告)日：2010-08-03

申请号：US11999315

申请日：2007-12-04

申请人： Kevin T. Chan

发明人： Kevin T. Chan

IPC分类号： H04L27/00 ,  H04L25/00

CPC分类号： H04L25/08 ,  H04B3/23 ,  H04B3/32 ,  H04L12/10 ,  H04L25/0276 ,  H04L25/0282 ,  H04L25/0286 ,  H04L25/03834 ,  H04L25/14

摘要： A power efficient and reduced electromagnetic interference (EMI) emissions transmitter for unshielded twisted pair (UTP) data communication applications. Transmit data is processed by a digital filter. The digital filter output data is converted to a current-mode analog waveform by a digital-to-analog converter (DAC). The digital filter is integrated with the DAC binary decoder in a memory device such as a ROM with time multiplexed output. DAC line driver cells are adaptively configurable to operate in either a class-A or a class-B mode depending on the desired operational modality. A discrete-time analog filter is integrated with the DAC line driver to provide additional EMI emissions suppression. An adaptive electronic transmission signal cancellation circuit separates transmit data from receive data in a bidirectional communication system operating in full duplex mode. For a multi-transmitter system, timing circuitry staggers the time base of each transmitter to reduce the aggregate EMI emissions of the multi-transmitter system.

摘要翻译： 用于非屏蔽双绞线（UTP）数据通信应用的功率高效和降低的电磁干扰（EMI）发射器。 发送数据由数字滤波器处理。 数字滤波器输出数据通过数/模转换器（DAC）转换为电流模式模拟波形。 数字滤波器与DAC二进制解码器集成在诸如具有时间复用输出的ROM的存储器件中。 DAC线路驱动器单元可以自适应地配置，以根据所需的操作模式在A类或B类模式下工作。 离散时间模拟滤波器与DAC线路驱动器集成，以提供额外的EMI发射抑制。 自适应电子传输信号消除电路在全双工模式下工作的双向通信系统中分离发送数据与接收数据。 对于多发射机系统，定时电路交错了每个发射机的时基，以减少多发射机系统的总EMI辐射。

公开(公告)号：US07589655B2

公开(公告)日：2009-09-15

申请号：US12204482

申请日：2008-09-04

申请人： Yee Ling Cheung ,  Kevin T. Chan ,  Jan Mulder

发明人： Yee Ling Cheung ,  Kevin T. Chan ,  Jan Mulder

IPC分类号： H03M1/66

CPC分类号： H03F3/45183 ,  H03F2203/45466

摘要： Provided is a method and system for controlling current characteristics in a transceiver having a transmitter. The method includes identifying a phase control signal from an adjacent current cell preceding the particular current cell in time and logically ORing the phase control signal from the preceding cell with a phase control signal from the particular current cell.

摘要翻译： 提供了一种用于控制具有发射机的收发机中的电流特性的方法和系统。 该方法包括在时间上识别来自特定当前小区之前的相邻当前小区的相位控制信号，并且将来自前一小区的相位控制信号与来自特定当前小区的相位控制信号进行逻辑或运算。

公开(公告)号：US20080129332A1

公开(公告)日：2008-06-05

申请号：US11980541

申请日：2007-10-31

申请人： Kevin T. Chan

发明人： Kevin T. Chan

IPC分类号： H03K19/003

CPC分类号： H04L25/0298

摘要： A communication system includes an integrated circuit (IC) die having an on-chip source termination. The on-chip source termination can be a non-precision resistor, such as an unsilicided poly resistor, or any other suitable termination. As compared to an off-chip source termination, the on-chip source termination can reduce voltage peaking and/or voltage overshoot in the IC die and/or at a load that is connected to the IC die. The IC die can further include a line driver to provide a source current. A bias generator can be included to provide a bias current to the line driver. The bias generator can include a first current source coupled to an off-chip resistor and a second current source coupled to an on-chip resistor. An output voltage of the IC die can be adjusted by manipulating a trim control of the off-chip resistor and/or a trim control of the on-chip resistor.

摘要翻译： 通信系统包括具有片上源极端接的集成电路（IC）管芯。 片上源极端接可以是非精密电阻器，例如非硅化聚电阻器，或任何其它合适的端接。 与片外源极端接相比，片上源极端接可以降低IC芯片中的电压峰化和/或电压过冲和/或连接到IC芯片的负载。 IC芯片还可以包括线驱动器以提供源极电流。 可以包括偏置发生器以向线路驱动器提供偏置电流。 偏置发生器可以包括耦合到片外电阻器的第一电流源和耦合到片上电阻器的第二电流源。 IC芯片的输出电压可以通过操作片外电阻器的微调控制和/或片上电阻器的微调控制来调节。

公开(公告)号：US06954490B2

公开(公告)日：2005-10-11

申请号：US10162974

申请日：2002-06-05

申请人： Kevin T. Chan

发明人： Kevin T. Chan

IPC分类号： H04B1/38 ,  H04B3/00 ,  H04B3/23 ,  H04B15/00 ,  H04J11/00 ,  H04L5/16 ,  H04L12/10 ,  H04L25/00 ,  H04L25/02 ,  H04L25/03 ,  H04L25/08 ,  H04L25/14 ,  H04L25/49 ,  H04L27/00 ,  H04L27/04

CPC分类号： H04L25/08 ,  H04B3/23 ,  H04B3/32 ,  H04L12/10 ,  H04L25/0276 ,  H04L25/0282 ,  H04L25/0286 ,  H04L25/03834 ,  H04L25/14

摘要： A power efficient and reduced electromagnetic interference (EMI) emissions transmitter for unshielded twisted pair (UTP) data communication applications. Transmit data is interpolated by N and processed by a digital filter to obtain the pulse shape required by the particular communication application. The digital filter output data is converted to a current-mode analog waveform by a digital-to-analog converter (DAC). The digital filter is integrated with the DAC binary decoder in a memory device such as a ROM with time multiplexed output. When implemented in such manner, the logical implementation and memory replaces digital filtering circuits, DAC decoding logic circuit and re-synchronization logic circuits that are conventionally implemented in hardware. Thus, the hardware functionality of these circuits is rendered into arithmetic form and implemented in a memory device.

摘要翻译： 用于非屏蔽双绞线（UTP）数据通信应用的功率高效和降低的电磁干扰（EMI）发射器。 发送数据由N内插并由数字滤波器处理以获得特定通信应用所需的脉冲形状。 数字滤波器输出数据通过数/模转换器（DAC）转换为电流模式模拟波形。 数字滤波器与DAC二进制解码器集成在诸如具有时间复用输出的ROM的存储器件中。 当以这种方式实现时，逻辑实现和存储器替代了常规地以硬件实现的数字滤波电路，DAC解码逻辑电路和重新同步逻辑电路。 因此，这些电路的硬件功能被呈现为算术形式并在存储器件中实现。