公开(公告)号：US20080304509A1

公开(公告)日：2008-12-11

申请号：US11759396

申请日：2007-06-07

Applicant: Huihao Xu ,  Joseph Natonio ,  James D. Rockrohr ,  Michael A. Sorna

Inventor： Huihao Xu ,  Joseph Natonio ,  James D. Rockrohr ,  Michael A. Sorna

IPC: H04L12/43

CPC classification number: G06F13/4286

Abstract: An integrated microelectronic serial driver is provided which is operable to transmit a differential pattern signal during a burst interval and a predetermined common mode voltage level during a second interval between adjacent burst intervals, the serial driver including at least one pre-driver and a driver coupled to an output of the pre-driver for transmitting the differential communication signal. A switching circuit is operable to switch the serial driver between a first power supply voltage level for the burst interval and the predetermined common mode voltage level, wherein the predetermined common mode voltage level is independent of variations in power supply voltage conditions and temperature conditions.

Abstract translation: 提供集成的微电子串行驱动器，其可操作以在相邻突发间隔期间的第二间隔期间在突发间隔期间和预定共模电压电平期间发送​​差分模式信号，所述串行驱动器包括至少一个预驱动器和耦合的驱动器 到用于发送差分通信信号的预驱动器的输出。 开关电路可操作以在脉冲串间隔的第一电源电压电平和预定共模电压电平之间切换串行驱动器，其中预定共模电压电平与电源电压条件和温度条件的变化无关。

公开(公告)号：US20050281343A1

公开(公告)日：2005-12-22

申请号：US10710064

申请日：2004-06-16

Applicant: Louis Hsu ,  Karl Selander ,  Michael Sorna ,  Jeremy Stephens ,  Huihao Xu

Inventor： Louis Hsu ,  Karl Selander ,  Michael Sorna ,  Jeremy Stephens ,  Huihao Xu

IPC: H04L25/00 ,  H04L25/03

CPC classification number: H04L25/03057 ,  H04L25/03343

Abstract: A data communication system includes a transmitter unit and a receiver unit. The transmission unit has a transmission characteristic that is adjustable in accordance with equalization information. The transmission unit is operable to transmit a predetermined signal and the receiver unit is operable to receive the predetermined signal. The receiver unit is further operable to generate the equalization information by examining the eye opening of the received signal, and to transmit the equalization information to the transmitter unit.

Abstract translation: 数据通信系统包括发射机单元和接收机单元。 发送单元具有根据均衡信息可调的传输特性。 发送单元可操作以发送预定信号，并且接收器单元可操作以接收预定信号。 接收机单元进一步可操作以通过检查接收到的信号的眼图来产生均衡信息，并将均衡信息发送到发射机单元。

公开(公告)号：US08144726B2

公开(公告)日：2012-03-27

申请号：US12154796

申请日：2008-05-27

Applicant: Huihao Xu ,  Joseph Natonio ,  James D. Rockrohr ,  Michael A. Sorna

Inventor： Huihao Xu ,  Joseph Natonio ,  James D. Rockrohr ,  Michael A. Sorna

IPC: H04L12/43 ,  G06F17/50

CPC classification number: G06F13/4295

Abstract: A design structure is provided for a microelectronic serial driver. The serial driver is operable to transmit a differential pattern signal during a burst interval and a predetermined common mode voltage level during a second interval between adjacent burst intervals, the serial driver including at least one pre-driver and a driver coupled to an output of the pre-driver for transmitting the differential communication signal. A switching circuit is operable to switch the serial driver between a first power supply voltage level for the burst interval and the predetermined common mode voltage level, wherein the predetermined common mode voltage level is independent of variations in power supply voltage conditions and temperature conditions.

Abstract translation: 为微电子串行驱动器提供了一种设计结构。 串行驱动器可操作以在相邻突发间隔期间的第二间隔期间在突发间隔期间和预定共模电压电平期间发送​​差分模式信号，该串行驱动器包括至少一个预驱动器和耦合到该输出的驱动器 用于发送差分通信信号的预驱动器。 开关电路可操作以在脉冲串间隔的第一电源电压电平和预定共模电压电平之间切换串行驱动器，其中预定共模电压电平与电源电压条件和温度条件的变化无关。

公开(公告)号：US07855563B2

公开(公告)日：2010-12-21

申请号：US11766268

申请日：2007-06-21

Applicant: Huihao Xu ,  Louis L. Hsu ,  Kevin G. Kramer ,  James D. Rockrohr ,  Michael A. Sorna

Inventor： Huihao Xu ,  Louis L. Hsu ,  Kevin G. Kramer ,  James D. Rockrohr ,  Michael A. Sorna

IPC: G01R31/00 ,  H04B3/46

CPC classification number: G01R31/041 ,  G01R31/026

Abstract: A system is provided for detecting a fault in a signal transmission path. In one embodiment, the system can include a variable amplitude signal attenuator which is operable to modify an input signal by variably attenuating a signal voltage swing of the input signal. Desirably, the input signal is attenuated only when transitioning from a high signal voltage level towards a low signal voltage level d variably, such that a larger high-to-low signal voltage swing is attenuated more than a smaller high-to-low signal voltage swing. Desirably, a comparator, which may apply hysteresis to the output signals, may detect a crossing of a reference voltage level by the modified input signal. In this way, when the comparator does not detect an expected crossing of the reference voltage level by the modified input signal, a determination can be made that a fault exists in the signal transmission path.

Abstract translation: 提供了一种用于检测信号传输路径中的故障的系统。 在一个实施例中，系统可以包括可变幅度信号衰减器，其可操作以通过可变地衰减输入信号的信号电压摆幅来修改输入信号。 期望地，只有当从高信号电压电平转换到低信号电压电平d时，输入信号才被衰减，使得较高的高电平到低的信号电压摆幅比较小的高到低信号电压衰减 摇摆。 期望地，可能对输出信号施加迟滞的比较器可以检测参考电压电平与修改的输入信号的交叉。 以这种方式，当比较器没有检测到通过修改的输入信号的参考电压电平的预期交叉时，可以确定在信号传输路径中存在故障。

公开(公告)号：US20090129485A1

公开(公告)日：2009-05-21

申请号：US11985963

申请日：2007-11-19

Applicant: Louis L. Hsu ,  Hayden C. Cranford, JR. ,  Joseph Natonio ,  James D. Rockrohr ,  Huihao Xu ,  Steven J. Zier

Inventor： Louis L. Hsu ,  Hayden C. Cranford, JR. ,  Joseph Natonio ,  James D. Rockrohr ,  Huihao Xu ,  Steven J. Zier

IPC: H04B3/00 ,  H04L27/00

CPC classification number: H04L25/0286 ,  H04L25/03343

Abstract: A design structure embodied in a machine-readable medium used in a design process provides a transmitter having a frequency response controllable in accordance with an operational parameter, and may include a storage operable to store operational parameters for controlling a frequency response of the transmitter under each of a plurality of corresponding operating conditions. A sensor can be used to detect an operating condition. In response to a change in the detected operating condition, a stored operational parameter corresponding to the detected operating condition can be used to control the frequency response of the transmitter.

Abstract translation: 体现在设计过程中使用的机器可读介质中的设计结构提供具有根据操作参数可控的频率响应的发射机，并且可以包括可操作地存储用于控制每个发射机的频率响应的操作参数的存储器 的多个相应的操作条件。 可以使用传感器来检测操作状态。 响应于检测到的操作条件的变化，可以使用与检测到的操作条件对应的存储的操作参数来控制发送器的频率响应。

公开(公告)号：US20090027075A1

公开(公告)日：2009-01-29

申请号：US12189226

申请日：2008-08-11

Applicant: Joseph O. Marsh ,  Jeremy Stephens ,  Charlie C. Hwang ,  James S. Mason ,  Huihao Xu ,  Matthew B. Baecher ,  Thomas J. Bardsley ,  Mark R. Taylor

Inventor： Joseph O. Marsh ,  Jeremy Stephens ,  Charlie C. Hwang ,  James S. Mason ,  Huihao Xu ,  Matthew B. Baecher ,  Thomas J. Bardsley ,  Mark R. Taylor

IPC: G01R31/28

CPC classification number: G01R31/3167 ,  G01R31/318544

Abstract: A circuit and method of testing an analog driver circuit using digital scan-based test methodologies. The circuit of the present invention comprises a control circuit for generating signals in response to a test enable signal, a differential driver circuit for receiving a differential input signal, amplifying the differential input signal and transmitting a differential output signal in response to the differential input signal and the signals generated by the control circuit, a programmable termination impedance circuit for generating a differential termination impedance at the output node of the differential driver circuit in response the signals generated by the control circuit, and a differential receiver circuit for receiving the differential output from the differential driver circuit, convert the differential output signal to a single ended signal and transmitting the single ended signal, all in response to the test enable signal. The method of the present invention comprises digitally testing the differential driver circuit by activating a test enable signal, skewing the differential output termination impedance in response to the test enable signal, adjusting a voltage offset of the differential receiver circuit in response to the test enable signal, selecting a power level for the differential driver circuit in response to the test enable signal, enabling a decoder in response to the test enable signal, wherein the decoder activates only one segment of the differential driver circuit during any one test sequence, activating one of the segments for testing, stimulating the differential driver circuit with digital test patterns, receiving an output of the differential driver circuit by the differential receiver circuit, converting the received differential driver output to a single-ended signal, observing the single-ended signal; and deactivating the test enable signal.

Abstract translation: 使用基于数字扫描的测试方法测试模拟驱动器电路的电路和方法。 本发明的电路包括用于响应于测试使能信号产生信号的控制电路，用于接收差分输入信号的差分驱动器电路，放大差分输入信号并响应差分输入信号发送差分输出信号 以及由所述控制电路产生的信号，用于响应于由所述控制电路产生的信号而在所述差分驱动器电路的输出节点处产生差分终端阻抗的可编程终端阻抗电路以及用于从所述差分接收电路接收所述差分输出的差分接收电路 差分驱动器电路将差分输出信号转换为单端信号并传输单端信号，全部是响应于测试使能信号。 本发明的方法包括通过激活测试使能信号来数字测试差分驱动器电路，响应于测试使能信号偏移差动输出终​​端阻抗，响应于测试使能信号调整差分接收器电路的电压偏移 ，响应于所述测试使能信号选择所述差分驱动器电路的功率电平，使能够响应于所述测试使能信号的解码器，其中所述解码器在任何一个测试序列期间仅激活所述差分驱动器电路的一个部分， 用于测试的段，用数字测试图案刺激差分驱动器电路，通过差分接收器电路接收差分驱动器电路的输出，将接收到的差分驱动器输出转换为单端信号，观察单端信号; 并禁用测试使能信号。

公开(公告)号：US20080316930A1

公开(公告)日：2008-12-25

申请号：US11766268

申请日：2007-06-21

Applicant: Huihao Xu ,  Louis L. Hsu ,  Kevin G. Kramer ,  James D. Rockrohr ,  Michael A. Sorna

Inventor： Huihao Xu ,  Louis L. Hsu ,  Kevin G. Kramer ,  James D. Rockrohr ,  Michael A. Sorna

IPC: G01R31/08

CPC classification number: G01R31/041 ,  G01R31/026

Abstract: A system is provided for detecting a fault in a signal transmission path. In one embodiment, the system can include a variable amplitude signal attenuator which is operable to modify an input signal by variably attenuating a signal voltage swing of the input signal. Desirably, the input signal is attenuated only when transitioning from a high signal voltage level towards a low signal voltage level d variably, such that a larger high-to-low signal voltage swing is attenuated more than a smaller high-to-low signal voltage swing. Desirably, a comparator, which may apply hysteresis to the output signals, may detect a crossing of a reference voltage level by the modified input signal. In this way, when the comparator does not detect an expected crossing of the reference voltage level by the modified input signal, a determination can be made that a fault exists in the signal transmission path.

Abstract translation: 提供了一种用于检测信号传输路径中的故障的系统。 在一个实施例中，系统可以包括可变幅度信号衰减器，其可操作以通过可变地衰减输入信号的信号电压摆幅来修改输入信号。 期望地，只有当从高信号电压电平转换到低信号电压电平d时，输入信号才被衰减，使得较高的高电平到低的信号电压摆幅比较小的高到低的信号电压衰减 摇摆。 期望地，可能对输出信号施加迟滞的比较器可以检测参考电压电平与修改的输入信号的交叉。 以这种方式，当比较器没有检测到通过修改的输入信号的参考电压电平的预期交叉时，可以确定在信号传输路径中存在故障。

公开(公告)号：US20080137721A1

公开(公告)日：2008-06-12

申请号：US11974967

申请日：2007-10-17

Applicant: Louis L. Hsu ,  Karl D. Selander ,  Michael A. Sorna ,  Jeremy K. Stephens ,  Huihao Xu

Inventor： Louis L. Hsu ,  Karl D. Selander ,  Michael A. Sorna ,  Jeremy K. Stephens ,  Huihao Xu

IPC: H04L27/01

CPC classification number: H04L25/03057 ,  H04L25/03343

Abstract: In a method for performing equalization of a communication system, a predetermined signal can be transmitted from a transmitter unit to a receiver unit in a downchannel direction on a transmission line, for example as a pair of differential signals which simultaneously transition in opposite directions on respective signal conductors of the transmission line. At the receiver unit, an eye opening of the signal received from the transmission line can be analyzed to determine equalization information. Equalization information can be transmitted from the receiver unit to the transmitter unit in an upchannel direction on the transmission line and be received at the transmitter unit. Using received equalization information, a transmission characteristic of the transmitter unit can be adjusted.

Abstract translation: 在用于执行通信系统的均衡的方法中，可以将预定信号从发射机单元发送到传输线上的下行信道方向上的接收机单元，例如作为在相应方向上同时沿相反方向转变的一对差分信号 传输线的信号导体。 在接收机单元，可以分析从传输线接收的信号的眼图，以确定均衡信息。 均衡信息可以在传输线上的上行方向上从接收机单元发送到发射机单元，并在发射机单元处接收。 使用接收到的均衡信息，可以调整发送单元的发送特性。

公开(公告)号：US20060159200A1

公开(公告)日：2006-07-20

申请号：US10905705

申请日：2005-01-18

Applicant: Louis Hsu ,  Matt Cordrey-Gale ,  James Mason ,  Phillip Murfet ,  Karl Selander ,  Michael Sorna ,  Huihao Xu

Inventor： Louis Hsu ,  Matt Cordrey-Gale ,  James Mason ,  Phillip Murfet ,  Karl Selander ,  Michael Sorna ,  Huihao Xu

IPC: H04L27/22

CPC classification number: H04L25/0274 ,  H04L25/0296

Abstract: A data receiver is provided which includes a front end interface circuit having an alternating current (AC) transmission receiving mode and a direct current (DC) transmission receiving mode. The front end interface circuit includes an offset compensation circuit operable to compensate a DC voltage offset between a pair of differential signals input to the data receiver. The front end interface circuit further includes an AC/DC selection unit operable to switch between (a) the DC transmission receiving mode, and (b) the AC transmission receiving mode, such that the data receiver is operable in (i) the DC transmission mode in which the offset compensation circuit is disabled, (ii) the DC transmission mode in which the offset compensation circuit is enabled, (iii) the AC transmission mode in which the offset compensation circuit is disabled, and (iv) the AC transmission receiving mode in which the offset compensation circuit is enabled.

Abstract translation: 提供一种数据接收器，其包括具有交流（AC）发送接收模式和直流（DC）发送接收模式的前端接口电路。 前端接口电路包括偏移补偿电路，其可操作以补偿输入到数据接收器的一对差分信号之间的直流电压偏移。 前端接口电路还包括可操作以在（a）直流发送接收模式和（b）交流发送接收模式之间切换的AC / DC选择单元，使得数据接收器可操作于（i）直流传输 偏移补偿电路被禁用的模式，（ii）使能偏移补偿电路的直流传输模式，（iii）偏移补偿电路被禁用的AC传输模式，以及（iv）AC传输接收 偏移补偿电路使能的模式。

公开(公告)号：US07733964B2

公开(公告)日：2010-06-08

申请号：US11974967

申请日：2007-10-17

Applicant: Louis L. Hsu ,  Karl D. Selander ,  Michael A. Sorna ,  Jeremy K. Stephens ,  Huihao Xu

Inventor： Louis L. Hsu ,  Karl D. Selander ,  Michael A. Sorna ,  Jeremy K. Stephens ,  Huihao Xu

IPC: H04B3/00 ,  H04L25/00

CPC classification number: H04L25/03057 ,  H04L25/03343

Abstract: In a method for performing equalization of a communication system, a predetermined signal can be transmitted from a transmitter unit to a receiver unit in a downchannel direction on a transmission line, for example as a pair of differential signals which simultaneously transition in opposite directions on respective signal conductors of the transmission line. At the receiver unit, an eye opening of the signal received from the transmission line can be analyzed to determine equalization information. Equalization information can be transmitted from the receiver unit to the transmitter unit in an upchannel direction on the transmission line and be received at the transmitter unit. Using received equalization information, a transmission characteristic of the transmitter unit can be adjusted.

Abstract translation: 在用于执行通信系统的均衡的方法中，可以将预定信号从发射机单元发送到传输线上的下行信道方向上的接收机单元，例如作为在相应方向上同时沿相反方向转变的一对差分信号 传输线的信号导体。 在接收机单元，可以分析从传输线接收的信号的眼图，以确定均衡信息。 均衡信息可以在传输线上的上行方向上从接收机单元发送到发射机单元，并在发射机单元处接收。 使用接收到的均衡信息，可以调整发送单元的发送特性。