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。

公开(公告)号：US20050260965A1

公开(公告)日：2005-11-24

申请号：US11115199

申请日：2005-04-27

申请人： Sumant Ranganathan ,  Tom Kwan ,  Hung-Sung Li

发明人： Sumant Ranganathan ,  Tom Kwan ,  Hung-Sung Li

IPC分类号： H04B1/10 ,  H04B1/30

CPC分类号： H04B1/30

摘要： Provided are a method and system for removing an offset direct current (DC) component from an input waveform. The method includes multiplying the input waveform with a demodulation waveform to produce a first differential current signal. An absolute value representation of the demodulation waveform is multiplied with a reference DC offset value to produce a second differential current signal. The first and second differential current signals are then differenced.

摘要翻译： 提供了用于从输入波形去除偏移直流（DC）分量的方法和系统。 该方法包括将输入波形与解调波形相乘以产生第一差分电流信号。 将解调波形的绝对值表示与参考DC偏移值相乘以产生第二差分电流信号。 然后，第一和第二差分电流信号被差分。

公开(公告)号：US08208462B2

公开(公告)日：2012-06-26

申请号：US12497337

申请日：2009-07-02

申请人： Tom Kwan ,  Sumant Ranganathan

发明人： Tom Kwan ,  Sumant Ranganathan

IPC分类号： H04B3/23 ,  H04M9/08

CPC分类号： H04L5/1423 ,  H04L25/0278

摘要： A second output transmission signal (“TX2”) added to a line driver is a scaled version of the main output transmission signal (“TX1”). TX2 is scaled from TX1 by a variable scale factor K. An adaptive hybrid circuit subtracts TX1 and TX2 from a line signal carrying both a line transmission signal and a line received signal (“RX”). A programmable impedance Ztune is coupled between the TX2 output of the line driver and the RX output of the adaptive hybrid circuit. A transmission echo in the output RX signal is measured. K and Ztune are then adaptively tuned to minimize the transmission echo. The hybrid in this case becomes a 4-port network, one port specifically added to adaptively cancel the transmission echo in the RX output of the adaptive hybrid circuit. Alternatively, the hybrid may be a 3-port hybrid including variable impedances to cancel the line transmission signal.

摘要翻译： 添加到线路驱动器的第二输出发送信号（“TX2”）是主输出发送信号（“TX1”）的缩放版本。 TX2通过可变比例因子K从TX1缩放。自适应混合电路从携带线路传输信号和线路接收信号（“RX”）的线路信号中减去TX1和TX2。 可编程阻抗Ztune耦合在线路驱动器的TX2输出和自适应混合电路的RX输出之间。 测量输出RX信号中的传输回波。 然后自适应调整K和Ztune以最小化传输回波。 在这种情况下，混合器成为一个4端口网络，一个专门添加的端口自适应地消除了自适应混合电路的RX输出中的传输回波。 或者，混合动力可以是包括可变阻抗以消除线路传输信号的3端口混合器。

公开(公告)号：US08018361B2

公开(公告)日：2011-09-13

申请号：US12615868

申请日：2009-11-10

申请人： Sumant Ranganathan ,  Tom Kwan ,  Xinyu Yu

发明人： Sumant Ranganathan ,  Tom Kwan ,  Xinyu Yu

IPC分类号： H03M1/00

CPC分类号： H03M1/002 ,  H03M1/1215 ,  H03M1/1225 ,  H03M1/168

摘要： The present invention relates generally to analog-to-digital converters (ADCs). Embodiments of the present invention provide novel ADC architectures directed at reducing the overall ADC area and power consumption. Embodiments of the present invention may be used in pipelined ADCs, cyclic ADCs, and successive approximation (SAR) ADCs, for example. Further, embodiments of the present invention may be implemented using both single-ended and differential configurations.

摘要翻译： 本发明一般涉及模数转换器（ADC）。 本发明的实施例提供了旨在降低总体ADC面积和功耗的新颖的ADC架构。 例如，本发明的实施例可以用于流水线ADC，循环ADC和逐次逼近（SAR）ADC。 此外，本发明的实施例可以使用单端和差分配置来实现。

公开(公告)号：US20100176977A1

公开(公告)日：2010-07-15

申请号：US12615868

申请日：2009-11-10

申请人： Sumant Ranganathan ,  Tom Kwan ,  Xinyu Yu

发明人： Sumant Ranganathan ,  Tom Kwan ,  Xinyu Yu

IPC分类号： H03M1/00 ,  H03M1/12

CPC分类号： H03M1/002 ,  H03M1/1215 ,  H03M1/1225 ,  H03M1/168

摘要： The present invention relates generally to analog-to-digital converters (ADCs). Embodiments of the present invention provide novel ADC architectures directed at reducing the overall ADC area and power consumption. Embodiments of the present invention may be used in pipelined ADCs, cyclic ADCs, and successive approximation (SAR) ADCs, for example. Further, embodiments of the present invention may be implemented using both single-ended and differential configurations.

摘要翻译： 本发明一般涉及模数转换器（ADC）。 本发明的实施例提供了旨在降低总体ADC面积和功耗的新颖的ADC架构。 例如，本发明的实施例可以用于流水线ADC，循环ADC和逐次逼近（SAR）ADC。 此外，本发明的实施例可以使用单端和差分配置来实现。

公开(公告)号：US07573839B2

公开(公告)日：2009-08-11

申请号：US11002430

申请日：2004-12-03

申请人： Tom Kwan ,  Sumant Ranganathan

发明人： Tom Kwan ,  Sumant Ranganathan

IPC分类号： H04B3/23

CPC分类号： H04L5/1423 ,  H04L25/0278

摘要： A second output transmission signal (“TX2”) added to a line driver is a scaled version of the main output transmission signal (“TX1”). TX2 is scaled from TX1 by a variable scale factor K. An adaptive hybrid circuit subtracts TX1 and TX2 from a line signal carrying both a line transmission signal and a line received signal (“RX”). A programmable impedance Ztune is coupled between the TX2 output of the line driver and the RX output of the adaptive hybrid circuit. A transmission echo in the output RX signal is measured. K and Ztune are then adaptively tuned to minimize the transmission echo. The hybrid in this case becomes a 4-port network, one port specifically added to adaptively cancel the transmission echo in the RX output of the adaptive hybrid circuit. Alternatively, the hybrid may be a 3-port hybrid including variable impedances to cancel the line transmission signal.

摘要翻译： 添加到线路驱动器的第二输出发送信号（“TX2”）是主输出发送信号（“TX1”）的缩放版本。 TX2通过可变比例因子K从TX1缩放。自适应混合电路从携带线路传输信号和线路接收信号（“RX”）的线路信号中减去TX1和TX2。 可编程阻抗Ztune耦合在线路驱动器的TX2输出和自适应混合电路的RX输出之间。 测量输出RX信号中的传输回波。 然后自适应调整K和Ztune以最小化传输回波。 在这种情况下，混合器成为一个4端口网络，一个专门添加的端口自适应地消除了自适应混合电路的RX输出中的传输回波。 或者，混合动力可以是包括可变阻抗以消除线路传输信号的3端口混合器。

公开(公告)号：US20060023647A1

公开(公告)日：2006-02-02

申请号：US11002430

申请日：2004-12-03

申请人： Tom Kwan ,  Sumant Ranganathan

发明人： Tom Kwan ,  Sumant Ranganathan

IPC分类号： H04B3/20

CPC分类号： H04L5/1423 ,  H04L25/0278

摘要： A second output transmission signal (“TX2”) added to a line driver is a scaled version of the main output transmission signal (“TX1”). TX2 is scaled from TX1 by a variable scale factor K. An adaptive hybrid circuit subtracts TX1 and TX2 from a line signal carrying both a line transmission signal and a line received signal (“RX”). A programmable impedance Ztune is coupled between the TX2 output of the line driver and the RX output of the adaptive hybrid circuit. A transmission echo in the output RX signal is measured. K and Ztune are then adaptively tuned to minimize the transmission echo. The hybrid in this case becomes a 4-port network, one port specifically added to adaptively cancel the transmission echo in the RX output of the adaptive hybrid circuit. Alternatively, the hybrid may be a 3-port hybrid including variable impedances to cancel the line transmission signal.

摘要翻译： 添加到线路驱动器的第二输出发送信号（“TX”2“）是主输出发送信号（”TX <1> 1“）的缩放版本。 TX＆lt; 2＆gt;从TX <1>＆lt; 1＆gt;乘以可变比例因子K。自适应混合电路减去TX＆lt; 1＆gt;和TX＆lt; 来自承载线路传输信号和线路接收信号（“RX”）的线路信号。 可编程阻抗Z调谐耦合在线路驱动器的TX <2>输出和自适应混合电路的RX输出之间。 测量输出RX信号中的传输回波。 然后自适应地调整K和Z调谐以最小化传输回波。 在这种情况下，混合器成为一个4端口网络，一个专门添加的端口自适应地消除了自适应混合电路的RX输出中的传输回波。 或者，混合动力可以是包括可变阻抗以消除线路传输信号的3端口混合器。

公开(公告)号：US20050243893A1

公开(公告)日：2005-11-03

申请号：US11115191

申请日：2005-04-27

申请人： Sumant Ranganathan ,  Tom Kwan ,  Hung-Sung Li

发明人： Sumant Ranganathan ,  Tom Kwan ,  Hung-Sung Li

IPC分类号： G01D5/24 ,  G01R27/26 ,  H04B1/69

CPC分类号： G01R27/2605 ,  G01D5/24

摘要： Provided are a method and system for demodulating a signal. The method includes receiving the signal along first and second signal paths within a demodulator having a common starting point. Impedance values along each of the paths are changed alternately in synchronism.

摘要翻译： 提供一种用于解调信号的方法和系统。 该方法包括沿着具有公共起始点的解调器中的第一和第二信号路径接收信号。 沿着每个路径的阻抗值交替地同步地改变。

公开(公告)号：US20050036562A1

公开(公告)日：2005-02-17

申请号：US10926212

申请日：2004-08-25

申请人： Sumant Ranganathan ,  Tom Kwan

发明人： Sumant Ranganathan ,  Tom Kwan

IPC分类号： H04L27/00 ,  H04B3/00

CPC分类号： H04L27/0002

摘要： Low voltage swing pad driver and receiver. A transmitter portion and a receiver portion are implemented within various devices that communicate using low voltage swing pads communicatively coupled via a trace. The transmitter portion of one device generates a current signal that is pushed/pulled to a low voltage swing pad and is then passed across the trace to another low voltage swing pad. The transmitter portion includes a current driver that outputs the current signal to the low voltage swing pads, and the receiver portion includes a trans-impedance amplifier that transforms the received current signal into a voltage signal. The low voltage swing pad driver and receiver generates a relatively low voltage swing when compared to CMOS full-scale voltage swings thereby significantly reducing the possibility of introducing any noise and/or distortion of data that is communicated via the interface.

摘要翻译： 低电压摆动盘驱动器和接收器。 发射机部分和接收机部分实现在使用通过迹线通信耦合的低电压摆动台进行通信的各种设备内。 一个设备的发射器部分产生被推/拉到低电压摆动焊盘的电流信号，然后将其传送到另一个低电压摆动焊盘。 发射机部分包括电流驱动器，其将电流信号输出到低电压摆动焊盘，并且接收器部分包括将接收的电流信号转换为电压信号的跨阻放大器。 与CMOS满量程电压摆幅相比，低电压摆幅驱动器和接收器产生相对低的电压摆幅，从而显着降低了引入通过接口传送的数据的任何噪声和/或失真的可能性。