公开(公告)号：US20050046475A1

公开(公告)日：2005-03-03

申请号：US10927311

申请日：2004-08-27

申请人： David Sobel ,  Augustine Kuo

发明人： David Sobel ,  Augustine Kuo

IPC分类号： H03F3/08 ,  H03F3/45

CPC分类号： H03F3/45 ,  H03F3/087 ,  H03F2200/372

摘要： A low-noise transmitter architecture and method for high linearity, high output-swing systems such as Asymmetrical Digital Subscriber Line (ADSL) systems. The transmitter uses a switched-current DAC having a current source coupled to ground, followed by a resistive transimpedance amplifier (TIA). The resistance of the current source is typically large enough so that noise from an op-amp included in the TIA is not significantly amplified at the output. The current source may be passive and may include at least one resistor connected to ground. With a passive current source, portions of a signal output by the DAC enter either the current source or the resistive transimpedance amplifier, but not both, eliminating noise in the system produced by the current source.

摘要翻译： 用于高线性度，高输出摆幅系统（例如非对称数字用户线路（ADSL）系统）的低噪声发射机架构和方法。 发射机使用具有耦合到地的电流源的开关电流DAC，随后是电阻跨阻抗放大器（TIA）。 电流源的电阻通常足够大，使得来自TIA中包括的运算放大器的噪声在输出端没有被显着放大。 电流源可以是无源的，并且可以包括连接到地的至少一个电阻器。 使用无源电流源，DAC输出的信号部分进入电流源或电阻跨阻放大器，但不能同时输入，消除了由电流源产生的系统中的噪声。

公开(公告)号：US07590393B2

公开(公告)日：2009-09-15

申请号：US11860343

申请日：2007-09-24

申请人： David Sobel ,  Augustine Kuo

发明人： David Sobel ,  Augustine Kuo

IPC分类号： H04B1/04

CPC分类号： H03F3/45 ,  H03F3/087 ,  H03F2200/372

摘要： A low-noise transmitter architecture and method for high linearity, high output-swing systems such as Asymmetrical Digital Subscriber Line (ADSL) systems. The transmitter uses a switched-current DAC having a current source coupled to ground, followed by a current-to-voltage converter. The resistance of the current source is typically large enough so that noise from an op-amp included in the current-to-voltage converter is not significantly amplified at the output. The current source may be passive and may include at least one resistor connected to ground. With a passive current source, portions of a signal output by the DAC enter either the current source or the current-to-voltage converter, but not both, eliminating noise in the system produced by the current source.

摘要翻译： 用于高线性度，高输出摆幅系统（例如非对称数字用户线路（ADSL）系统）的低噪声发射机架构和方法。 发射机使用具有耦合到地的电流源的开关电流DAC，随后是电流 - 电压转换器。 电流源的电阻通常足够大，使得包括在电流 - 电压转换器中的运算放大器的噪声在输出端没有被显着放大。 电流源可以是无源的，并且可以包括连接到地的至少一个电阻器。 使用无源电流源，DAC输出的信号部分进入电流源或电流 - 电压转换器，但不能同时输入，消除了由电流源产生的系统中的噪声。

公开(公告)号：US07274915B2

公开(公告)日：2007-09-25

申请号：US10927311

申请日：2004-08-27

申请人： David Sobel ,  Augustine Kuo

发明人： David Sobel ,  Augustine Kuo

IPC分类号： H04B1/04

CPC分类号： H03F3/45 ,  H03F3/087 ,  H03F2200/372

摘要： A low-noise transmitter architecture and method for high linearity, high output-swing systems such as Asymmetrical Digital Subscriber Line (ADSL) systems. The transmitter uses a switched-current DAC having a current source coupled to ground, followed by a resistive transimpedance amplifier (TIA). The resistance of the current source is typically large enough so that noise from an op-amp included in the TIA is not significantly amplified at the output. The current source may be passive and may include at least one resistor connected to ground. With a passive current source, portions of a signal output by the DAC enter either the current source or the resistive transimpedance amplifier, but not both, eliminating noise in the system produced by the current source.

摘要翻译： 用于高线性度，高输出摆幅系统（例如非对称数字用户线路（ADSL）系统）的低噪声发射机架构和方法。 发射机使用具有耦合到地的电流源的开关电流DAC，随后是电阻跨阻抗放大器（TIA）。 电流源的电阻通常足够大，使得来自TIA中包括的运算放大器的噪声在输出端没有被显着放大。 电流源可以是无源的，并且可以包括连接到地的至少一个电阻器。 使用无源电流源，DAC输出的信号部分进入电流源或电阻跨阻放大器，但不能同时输入，消除了由电流源产生的系统中的噪声。

公开(公告)号：US20080008262A1

公开(公告)日：2008-01-10

申请号：US11860343

申请日：2007-09-24

申请人： David Sobel ,  Augustine Kuo

发明人： David Sobel ,  Augustine Kuo

IPC分类号： H04L25/03 ,  H03F1/38 ,  H04B1/04

CPC分类号： H03F3/45 ,  H03F3/087 ,  H03F2200/372

摘要： A low-noise transmitter architecture and method for high linearity, high output-swing systems such as Asymmetrical Digital Subscriber Line (ADSL) systems. The transmitter uses a switched-current DAC having a current source coupled to ground, followed by a current-to-voltage converter. The resistance of the current source is typically large enough so that noise from an op-amp included in the current-to-voltage converter is not significantly amplified at the output. The current source may be passive and may include at least one resistor connected to ground. With a passive current source, portions of a signal output by the DAC enter either the current source or the current-to-voltage converter, but not both, eliminating noise in the system produced by the current source.

摘要翻译： 用于高线性度，高输出摆幅系统（例如非对称数字用户线路（ADSL）系统）的低噪声发射机架构和方法。 发射机使用具有耦合到地的电流源的开关电流DAC，随后是电流 - 电压转换器。 电流源的电阻通常足够大，使得包括在电流 - 电压转换器中的运算放大器的噪声在输出端没有被显着放大。 电流源可以是无源的，并且可以包括连接到地的至少一个电阻器。 使用无源电流源，DAC输出的信号部分进入电流源或电流 - 电压转换器，但不能同时输入，消除了由电流源产生的系统中的噪声。

公开(公告)号：US20050060587A1

公开(公告)日：2005-03-17

申请号：US10887068

申请日：2004-07-08

申请人： Andrew Hwang ,  Augustine Kuo ,  Michael Hurt

发明人： Andrew Hwang ,  Augustine Kuo ,  Michael Hurt

IPC分类号： G06F1/28 ,  G06F1/26

CPC分类号： G06F1/28

摘要： Certain aspects of a system for controlling power for a network interface controller device may comprise a precision voltage comparator that may instantaneously detect ramp up of a main voltage corresponding to a main voltage source in order to control the network interface controller device. A power monitor may detect when a threshold voltage of the main voltage is reached during the ramp up. A main voltage source switch and an auxiliary voltage source switch may switch an output from an auxiliary voltage to the main voltage source without the switches being simultaneously on. The power monitor may determine whether the main voltage is ramping up in excess of a determined rate and if so, may decrease a rate at which the main voltage ramps up. A current limiter and/or the power monitor may monitor and limit an inrush current caused during main voltage ramp up.

摘要翻译： 用于控制网络接口控制器设备的电源的系统的某些方面可以包括精密电压比较器，其可以瞬时检测对应于主电压源的主电压的上升以便控制网络接口控制器设备。 功率监视器可以在升高期间检测何时达到主电压的阈值电压。 主电压源开关和辅助电压源开关可以将辅助电压的输出切换到主电压源，而不会同时打开开关。 功率监视器可以确定主电压是否正在上升超过确定的速率，如果是，则可以降低主电压上升的速率。 电流限制器和/或功率监视器可以监视和限制在主电压升高期间引起的浪涌电流。

公开(公告)号：US20050089158A1

公开(公告)日：2005-04-28

申请号：US10692821

申请日：2003-10-27

申请人： Augustine Kuo ,  Tom Kwan ,  Sumant Ranganathan

发明人： Augustine Kuo ,  Tom Kwan ,  Sumant Ranganathan

IPC分类号： H04L12/66 ,  H04M1/00 ,  H04M9/00

CPC分类号： H04L12/66

摘要： A hybrid circuit that decouples gains for a transmit signal and a receive signal of a broadband modem that is coupled to a telephone line is provided. The hybrid circuit includes a multi-port transformer, a pair of line matching resistors, and a bridge circuit. The multi-port transformer includes a line coil electrically coupled to a telephone line, a linedriver coil magnetically coupled to the line coil and a receive coil that is also magnetically coupled to the line coil. In an alternate embodiment, a hybrid circuit is provided that includes a multi-port transformer in which the line coil, linedriver coil and receive coil include two coil segments. A broadband modem incorporating a hybrid circuit of the present invention is also provided.

摘要翻译： 提供了耦合到电话线的宽带调制解调器的发送信号和接收信号的增益去耦合的混合电路。 混合电路包括多端口变压器，一对线路匹配电阻器和桥式电路。 多端口变压器包括电耦合到电话线的线圈线圈，磁耦合到线圈线圈的线圈绕组线圈和也与线圈线圈耦合的接收线圈。 在替代实施例中，提供了一种混合电路，其包括多端口变压器，其中线圈线圈，内线圈线圈和接收线圈包括两个线圈段。 还提供了包含本发明的混合电路的宽带调制解调器。

公开(公告)号：US07453943B2

公开(公告)日：2008-11-18

申请号：US10692821

申请日：2003-10-27

申请人： Augustine Kuo ,  Tom Kwan ,  Sumant Ranganathan

发明人： Augustine Kuo ,  Tom Kwan ,  Sumant Ranganathan

IPC分类号： H04B3/00 ,  H04B1/38 ,  H04M1/00 ,  H04M9/00

CPC分类号： H04L12/66

摘要： A hybrid circuit that decouples gains for a transmit signal and a receive signal of a broadband modem that is coupled to a telephone line is provided. The hybrid circuit includes a multi-port transformer, a pair of line matching resistors, and a bridge circuit. The multi-port transformer includes a line coil electrically coupled to a telephone line, a linedriver coil magnetically coupled to the line coil and a receive coil that is also magnetically coupled to the line coil. In an alternate embodiment, a hybrid circuit is provided that includes a multi-port transformer in which the line coil, linedriver coil and receive coil include two coil segments. A broadband modem incorporating a hybrid circuit of the present invention is also provided.

摘要翻译： 提供了耦合到电话线的宽带调制解调器的发送信号和接收信号的增益去耦合的混合电路。 混合电路包括多端口变压器，一对线路匹配电阻器和桥式电路。 多端口变压器包括电耦合到电话线的线圈线圈，磁耦合到线圈线圈的线圈绕组线圈和也与线圈线圈耦合的接收线圈。 在替代实施例中，提供了一种混合电路，其包括多端口变压器，其中线圈线圈，内线圈线圈和接收线圈包括两个线圈段。 还提供了包含本发明的混合电路的宽带调制解调器。