公开(公告)号：US08045608B2

公开(公告)日：2011-10-25

申请号：US12221002

申请日：2008-07-30

申请人： Xingdong Dai ,  Geoffrey Zhang ,  Max Olsen ,  Dwight Daugherty ,  Gary Schiessler ,  Mohammad Mobin ,  Lane Smith ,  Dennis Farley

发明人： Xingdong Dai ,  Geoffrey Zhang ,  Max Olsen ,  Dwight Daugherty ,  Gary Schiessler ,  Mohammad Mobin ,  Lane Smith ,  Dennis Farley

IPC分类号： H03H7/30

CPC分类号： H04L25/03057 ,  H04L2025/03592

摘要： In described embodiments, an adaptive equalizer employed by a receiver in a communication channel, such as Fibre Channel, employs pattern recognition. When a repeating pattern, such as an IDLE or ARBFF pattern, is employed by a standard to, for example, maintain a communication link, an equalizer of the receiver might adaptively set its equalizer parameters based on characteristics of the signal energy of the repeating pattern rather than adaptively set its equalizer parameters based on characteristics of the signal energy of generally random user data carried on the link. Pattern recognition by the receiver allows for maintaining adaptive equalizer parameters at settings preferred for data detection of the typical random data, improving data detection performance of the receiver when the channel transitions from a preset or synchronization repeating pattern to a user random data pattern.

摘要翻译： 在所描述的实施例中，由诸如光纤通道的通信信道中的接收机使用的自适应均衡器使用模式识别。 当诸如空闲或ARBFF模式的重复模式被标准采用以例如维持通信链路时，接收机的均衡器可以基于重复模式的信号能量的特性来自适应地设置其均衡器参数 而不是基于在链路上携带的一般随机用户数据的信号能量的特性自适应地设置其均衡器参数。 接收机的模式识别允许在优选用于典型随机数据的数据检测的设置下维持自适应均衡器参数，当信道从预设或同步重复模式转换到用户随机数据模式时，提高接收机的数据检测性能。

公开(公告)号：US20100027611A1

公开(公告)日：2010-02-04

申请号：US12221002

申请日：2008-07-30

申请人： Xingdong Dai ,  Geoffrey Zhang ,  Gary Schiessler ,  Dwight Daugherty ,  Mohammad Mobin ,  Lane Smith ,  Dennis Farley ,  Max Olsen

发明人： Xingdong Dai ,  Geoffrey Zhang ,  Gary Schiessler ,  Dwight Daugherty ,  Mohammad Mobin ,  Lane Smith ,  Dennis Farley ,  Max Olsen

IPC分类号： H04L27/01

CPC分类号： H04L25/03057 ,  H04L2025/03592

摘要： In described embodiments, an adaptive equalizer employed by a receiver in a communication channel, such as Fibre Channel, employs pattern recognition. When a repeating pattern, such as an IDLE or ARBFF pattern, is employed by a standard to, for example, maintain a communication link, an equalizer of the receiver might adaptively set its equalizer parameters based on characteristics of the signal energy of the repeating pattern rather than adaptively set its equalizer parameters based on characteristics of the signal energy of generally random user data carried on the link. Pattern recognition by the receiver allows for maintaining adaptive equalizer parameters at settings preferred for data detection of the typical random data, improving data detection performance of the receiver when the channel transitions from a preset or synchronization repeating pattern to a user random data pattern.

摘要翻译： 在所描述的实施例中，由诸如光纤通道的通信信道中的接收机使用的自适应均衡器使用模式识别。 当诸如空闲或ARBFF模式的重复模式被标准采用以例如维持通信链路时，接收机的均衡器可以基于重复模式的信号能量的特性来自适应地设置其均衡器参数 而不是基于在链路上携带的一般随机用户数据的信号能量的特性自适应地设置其均衡器参数。 接收机的模式识别允许在优选用于典型随机数据的数据检测的设置下维持自适应均衡器参数，当信道从预设或同步重复模式转换到用户随机数据模式时，提高接收机的数据检测性能。

公开(公告)号：US20100027606A1

公开(公告)日：2010-02-04

申请号：US12221003

申请日：2008-07-30

申请人： Xingdong Dai ,  Geoffrey Zhang ,  Max Olsen ,  Dwight Daugherty

发明人： Xingdong Dai ,  Geoffrey Zhang ,  Max Olsen ,  Dwight Daugherty

IPC分类号： H03K5/159

CPC分类号： H04L25/03019

摘要： In described embodiments, an adaptive equalizer employed by a receiver in a communication channel, such as Fibre Channel, employs pattern recognition. When a repeating pattern, such as an IDLE or ARBFF pattern, is employed by a standard to, for example, maintain a communication link, an equalizer of the receiver might adaptively set its equalizer parameters based on characteristics of the signal energy of the repeating pattern rather than adaptively set its equalizer parameters based on characteristics of the signal energy of generally random user data carried on the link. Pattern recognition by the receiver allows for maintaining adaptive equalizer parameters at settings preferred for data detection of the typical random data, improving data detection performance of the receiver when the channel transitions from a preset or synchronization repeating pattern to a user random data pattern.

公开(公告)号：US08045609B2

公开(公告)日：2011-10-25

申请号：US12221003

申请日：2008-07-30

申请人： Xingdong Dai ,  Geoffrey Zhang ,  Max Olsen ,  Dwight Daugherty

发明人： Xingdong Dai ,  Geoffrey Zhang ,  Max Olsen ,  Dwight Daugherty

IPC分类号： H03H7/30

CPC分类号： H04L25/03019

摘要： In described embodiments, an adaptive equalizer employed by a receiver in a communication channel, such as Fiber Channel, employs pattern recognition. When a repeating pattern, such as an IDLE or ARBFF pattern, is employed by a standard to, for example, maintain a communication link, an equalizer of the receiver might adaptively set its equalizer parameters based on characteristics of the signal energy of the repeating pattern rather than adaptively set its equalizer parameters based on characteristics of the signal energy of generally random user data carried on the link. Pattern recognition by the receiver allows for maintaining adaptive equalizer parameters at settings preferred for data detection of the typical random data, improving data detection performance of the receiver when the channel transitions from a preset or synchronization repeating pattern to a user random data pattern.

摘要翻译： 在所描述的实施例中，由诸如光纤通道的通信信道中的接收机使用的自适应均衡器使用模式识别。 当诸如空闲或ARBFF模式的重复模式被标准采用以例如维持通信链路时，接收机的均衡器可以基于重复模式的信号能量的特性来自适应地设置其均衡器参数 而不是基于在链路上携带的一般随机用户数据的信号能量的特性自适应地设置其均衡器参数。 接收机的模式识别允许在优选用于典型随机数据的数据检测的设置下维持自适应均衡器参数，当信道从预设或同步重复模式转换到用户随机数据模式时，提高接收机的数据检测性能。

公开(公告)号：US5568094A

公开(公告)日：1996-10-22

申请号：US356812

申请日：1994-12-15

申请人： John W. Bowen ,  Dwight Daugherty ,  Stuart H. Wemple ,  Melvin West, Jr.

发明人： John W. Bowen ,  Dwight Daugherty ,  Stuart H. Wemple ,  Melvin West, Jr.

IPC分类号： H03F3/20 ,  H03F1/02 ,  H03G3/00 ,  H03G3/30

CPC分类号： H03F3/24 ,  H03F1/0211 ,  H03G3/007 ,  H03G3/3042 ,  H03G3/3047 ,  H03F2200/405 ,  H03F2200/516

摘要： An apparatus and method is provided that uses a simple voltage ratio technique to supply specific voltages to a voltage variable attenuator, and the gates of a GaAs RF power amplifier in order to control the efficiency of the amplifier. The output of the power amplifier is sampled and then fed back to the variable voltage attenuator as a control signal. A ratio portion of the control signal is then used to control the gate biases of the power amplifier. When the power requirements are less than maximum, the voltage ratio will become more negative, resulting in less current. As the RF output increases, the voltage ratio will become more positive. Therefore, as the DC voltage varies, the power amplifier's output power will vary accordingly providing the desired output power with enhanced efficiency.

摘要翻译： 提供了一种使用简单的电压比技术向电压可变衰减器和GaAs RF功率放大器的栅极提供特定电压以便控制放大器的效率的装置和方法。 功率放大器的输出被采样，然后作为控制信号反馈到可变电压衰减器。 然后控制信号的比率部分用于控制功率放大器的栅极偏置。 当功率要求小于最大值时，电压比将变得更负，导致电流较小。 随着RF输出增加，电压比将变得更加正。 因此，随着直流电压的变化，功率放大器的输出功率将相应地变化，从而提供所需的输出功率并提高效率。

公开(公告)号：US08125241B2

公开(公告)日：2012-02-28

申请号：US12725534

申请日：2010-03-17

申请人： Roger Fratti ,  Dwight Daugherty

发明人： Roger Fratti ,  Dwight Daugherty

IPC分类号： H03K17/16 ,  H03K19/003 ,  H03K5/12

CPC分类号： H04L25/0288 ,  H04L25/03343

摘要： In described embodiments, automatic de-emphasis setting is provided for driving a capacitive backplane. Line impedance and line length of a transmission (TX) device are measured that form a load impedance of a driver. For some exemplary embodiments, the line impedance is predominantly a line capacitance, and such embodiments detect this capacitance. Measured line impedance is converted to a control signal (such as, for example, a three bit digital control signal) which automatically sets the de-emphasis of the TX stage. With the amount of capacitance and the length of the transmission line, the appropriate de-emphasis settings might be determined, and such de-emphasis setting be applied by the transmitter to the driver to compensate for transmission line effects.

摘要翻译： 在所描述的实施例中，提供了用于驱动电容背板的自动去加重设置。 测量传输（TX）设备的线路阻抗和线路长度，形成驱动器的负载阻抗。 对于一些示例性实施例，线路阻抗主要是线路电容，并且这些实施例检测该电容。 测量的线路阻抗被转换为自动设置TX级的去加重的控制信号（例如，三位数字控制信号）。 利用电容量和传输线的长度，可以确定适当的去加重设置，并且这种去加重设置由发射机应用于驱动器以补偿传输线效应。

公开(公告)号：US20110080237A1

公开(公告)日：2011-04-07

申请号：US12725534

申请日：2010-03-17

申请人： Roger Fratti ,  Dwight Daugherty

发明人： Roger Fratti ,  Dwight Daugherty

IPC分类号： H04L25/03

CPC分类号： H04L25/0288 ,  H04L25/03343

摘要： In described embodiments, automatic de-emphasis setting is provided for driving a capacitive backplane. Line impedance and line length of a transmission (TX) device are measured that form a load impedance of a driver. For some exemplary embodiments, the line impedance is predominantly a line capacitance, and such embodiments detect this capacitance. Measured line impedance is converted to a control signal (such as, for example, a three bit digital control signal) which automatically sets the de-emphasis of the TX stage. With the amount of capacitance and the length of the transmission line, the appropriate de-emphasis settings might be determined, and such de-emphasis setting be applied by the transmitter to the driver to compensate for transmission line effects.

摘要翻译： 在所描述的实施例中，提供了用于驱动电容背板的自动去加重设置。 测量传输（TX）设备的线路阻抗和线路长度，形成驱动器的负载阻抗。 对于一些示例性实施例，线路阻抗主要是线路电容，并且这些实施例检测该电容。 测量的线路阻抗被转换为自动设置TX级的去加重的控制信号（例如，三位数字控制信号）。 利用电容量和传输线的长度，可以确定适当的去加重设置，并且这种去加重设置由发射机应用于驱动器以补偿传输线效应。