公开(公告)号：US08401502B2

公开(公告)日：2013-03-19

申请号：US12536024

申请日：2009-08-05

Applicant: Yee Ling Cheung ,  Kevin T. Chan ,  Jan Mulder

Inventor： Yee Ling Cheung ,  Kevin T. Chan ,  Jan Mulder

IPC: H04B1/04

CPC classification number: H04B1/581

Abstract: Provided is a method and system for controlling current characteristics in a transceiver having a transmitter. The transmitter includes a plurality of current cells. Each cell is configurable for operating in different modes. The method includes determining a first probability associated with transmitting data at a particular symbolic level and determining a second probability associated with each cell being used during a transmission at the particular symbolic level. Next, one of the modes for each cell is selected in accordance with anticipated performance requirements. An average current of the transmitter is then calculated based upon the determined first and second probabilities and the selected modes.

公开(公告)号：US20130003616A1

公开(公告)日：2013-01-03

申请号：US13533513

申请日：2012-06-26

Applicant: Kevin T. Chan

Inventor： Kevin T. Chan

IPC: H04L5/14

CPC classification number: H04B3/32 ,  H04B1/586 ,  H04B3/23 ,  H04L12/10

Abstract: An adaptive electronic transmission signal cancellation circuit for separating transmit data from receive data in a bidirectional communication system operating in full duplex mode is disclosed. The output of a main transmitter responsive to a first bias current is connected to the output of a receiver through an internal resistor. A first replica transmitter responsive to a second bias current and matched to the main transmitter current gain and rise/fall time characteristics is connected to the input terminal of the receiver, and produces a cancellation voltage between the output terminal of the main transmitter and the input terminal of the receiver as a function of the second bias current and the internal resistor. A second replica transmitter matched to the current gain and rise/fall time characteristics of the main transmitter and the first replica transmitter and responsive to the second bias current is connected to the output terminal of the main transmitter for canceling excess current, developed by the first replica transmitter, at the output terminal of the main transmitter.

Abstract translation: 公开了一种用于在全双工模式下工作的双向通信系统中从发送数据与接收数据分离的自适应电子传输信号消除电路。 响应于第一偏置电流的主发射机的输出通过内部电阻器连接到接收器的输出端。 响应于第二偏置电流并与主发射机电流增益和上升/下降时间特性匹配的第一复制发射机连接到接收机的输入端，并且在主发射机的输出端和输入端之间产生抵消电压 接收器的端子作为第二偏置电流和内部电阻器的函数。 与主发射机和第一复制发射机的当前增益和上升/下降时间特性匹配的第二复制发射机并响应于第二偏置电流连接到主发射机的输出端，用于消除由第一 复制发射机，在主发射机的输出端。

公开(公告)号：US20120190318A1

公开(公告)日：2012-07-26

申请号：US13437570

申请日：2012-04-02

Applicant: Kevin T. Chan

Inventor： Kevin T. Chan

IPC: H04B3/46

CPC classification number: H04B1/02 ,  H04W52/52

Abstract: A transmitter includes a detection element to determine when a current power requirement of a communication link is less than the standard transmit power. The current power requirement may be determined by a current operation condition of the communication link, for instance. The transmit power of the transmitter may be set to be less than the standard power in any of a variety of ways. For example, a center tap voltage of the transmitter may be reduced. In another example, a class of operation of the transmitter may be changed. In yet another example, the transmitter may include a current mirror having a plurality of diode-connected transistors coupled in parallel, thereby reducing the current at output terminals of the transmitter. Reducing the current at the output terminals decreases the output power of the transmitter, which may reduce the power consumed by the transmitter.

Abstract translation: 发射机包括检测元件，用于确定通信链路的当前功率需求何时小于标准发射功率。 例如，当前功率需求可以由通信链路的当前操作条件来确定。 发射机的发射功率可以以各种方式中的任何一种设置为小于标准功率。 例如，可以减小发射机的中心抽头电压。 在另一示例中，可以改变发射机的一类操作。 在又一示例中，发射机可以包括具有并联耦合的多个二极管连接的晶体管的电流镜，从而降低发射器的输出端处的电流。 降低输出端子处的电流会降低发射机的输出功率，从而降低发射机的功耗。

公开(公告)号：US20100226387A1

公开(公告)日：2010-09-09

申请号：US12782319

申请日：2010-05-18

Applicant: Richard G. THOUSAND ,  Kevin T. Chan ,  Kevin Brown

Inventor： Richard G. THOUSAND ,  Kevin T. Chan ,  Kevin Brown

IPC: H04L12/403

CPC classification number: H04L12/10 ,  H04L12/40078

Abstract: 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.

Abstract translation: 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：US20100177809A1

公开(公告)日：2010-07-15

申请号：US12659739

申请日：2010-03-19

Applicant: Kevin T. Chan ,  Michael Q. Le

Inventor： Kevin T. Chan ,  Michael Q. Le

IPC: H04B1/38

CPC classification number: H04L12/40013 ,  H04J3/0685 ,  H04L12/28 ,  H04L12/4625 ,  H04L43/00

Abstract: A physical layer device (PLD) includes a first serializer-deserializer (SERDES) device and a second SERDES device. Each SERDES device includes an analog portion with a serial port that is configured to communicate serial data with various network devices, and a digital portion that is configured to communicate parallel data with other various network devices. The PLD includes a first signal path that is configured to route serial data signals between the analog portions of the SERDES devices, bypassing the digital portions of the SERDES devices. Therefore, the SERDES devices can directly communicate serial data without performing parallel data conversion. A second signal path is configured to route recovered clock and data signals between the analog portions of the SERDES devices, but still bypassing the digital portions of the SERDES devices. The recovered clock and data signals are then regenerated before being transmitted over a network device.

公开(公告)号：US07738482B2

公开(公告)日：2010-06-15

申请号：US10986666

申请日：2004-11-12

Applicant: Richard G. Thousand ,  Kevin T. Chan ,  Kevin Brown

Inventor： Richard G. Thousand ,  Kevin T. Chan ,  Kevin Brown

IPC: H04L12/403

CPC classification number: H04L12/10 ,  H04L12/40078

Abstract: 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.

Abstract translation: 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：US20090154381A1

公开(公告)日：2009-06-18

申请号：US12372632

申请日：2009-02-17

Applicant: Kevin T. Chan

Inventor： Kevin T. Chan

IPC: H04B3/20

CPC classification number: H04B3/32 ,  H04B1/586 ,  H04B3/23 ,  H04L12/10

Abstract: An adaptive electronic transmission signal cancellation circuit for separating transmit data from receive data in bidirectional communication system operating in full duplex mod is disclosed. The output of a main transmitter responsive to a first bias current is connected to the output of a receiver through an internal resistor. A first replica transmitter responsive to a second bias current and matched to the main transmitter current gain and rise/fall time characteristics is connected to the input terminal of the receiver, and produces a cancellation voltage between the output terminal of the main transmitter and the input terminal of the receiver as a function of the second bias current and the internal resistor. A second replica transmitter matched to the current gain and rise/fall time characteristics of the main transmitter and the first replica transmitter and responsive to the second bias current is connected to the output terminal of the main transmitter for canceling excess current, developed by the first replica transmitter, at the output terminal of the main transmitter.

Abstract translation: 公开了一种用于在全双工模式下操作的双向通信系统中将发送数据与接收数据进行分离的自适应电子发送信号消除电路。 响应于第一偏置电流的主发射机的输出通过内部电阻器连接到接收器的输出端。 响应于第二偏置电流并与主发射机电流增益和上升/下降时间特性匹配的第一复制发射机连接到接收机的输入端，并且在主发射机的输出端和输入端之间产生抵消电压 接收器的端子作为第二偏置电流和内部电阻器的函数。 与主发射机和第一复制发射机的当前增益和上升/下降时间特性匹配的第二复制发射机并响应于第二偏置电流连接到主发射机的输出端，用于消除由第一 复制发射机，在主发射机的输出端。

公开(公告)号：US20090121910A1

公开(公告)日：2009-05-14

申请号：US12204482

申请日：2008-09-04

Applicant: Yee Ling Cheung ,  Kevin T. Chan ,  Jan Mulder

Inventor： Yee Ling Cheung ,  Kevin T. Chan ,  Jan Mulder

IPC: H03M1/66

CPC classification number: H03F3/45183 ,  H03F2203/45466

Abstract: 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.

Abstract translation: 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：US07492840B2

公开(公告)日：2009-02-17

申请号：US10848350

申请日：2004-05-18

Applicant: Kevin T. Chan

Inventor： Kevin T. Chan

IPC: H04B1/10

CPC classification number: H04B3/32 ,  H04B1/586 ,  H04B3/23 ,  H04L12/10

Abstract: An adaptive electronic transmission signal cancellation circuit for separating transmit data from receive data in a bidirectional communication system operating in full duplex mode is disclosed. The output of a main transmitter responsive to a first bias current is connected to the output of a receiver through an internal resistor. A first replica transmitter responsive to a second bias current and matched to the main transmitter current gain and rise/fall time characteristics is connected to the input terminal of the receiver, and produces a cancellation voltage between the output terminal of the main transmitter and the input terminal of the receiver as a function of the second bias current and the internal resistor. A second replica transmitter matched to the current gain and rise/fall time characteristics of the main transmitter and the first replica transmitter and responsive to the second bias current is connected to the output terminal of the main transmitter for canceling excess current, developed by the first replica transmitter, at the output terminal of the main transmitter.

公开(公告)号：US07301365B2

公开(公告)日：2007-11-27

申请号：US11115117

申请日：2005-04-27

Applicant: Kevin T. Chan

Inventor： Kevin T. Chan

IPC: H03K17/16 ,  H03K19/003

CPC classification number: H04L25/0298

Abstract: 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.

Abstract translation: 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。