公开(公告)号：US07065143B1

公开(公告)日：2006-06-20

申请号：US10083305

申请日：2002-02-26

申请人： Dan V. Gorcea ,  Carl C. Anderson ,  Gyula G. Jakab

发明人： Dan V. Gorcea ,  Carl C. Anderson ,  Gyula G. Jakab

IPC分类号： H04B3/00

CPC分类号： H04B3/02 ,  H04L27/0002

摘要： A DSL modem comprises an additional transformer and additional coils on a coupling transformer to couple a received signal on a transmission line to a receive path without loss due to an active impedance. The ratio of windings on the coils allows gain to be introduced to improve the signal to noise ratio.

摘要翻译： DSL调制解调器包括附加变压器和耦合变压器上的附加线圈，以将传输线上的接收信号耦合到接收路径，而不会由于有源阻抗而损耗。 线圈上的绕组比率允许引入增益以提高信噪比。

公开(公告)号：US06822546B1

公开(公告)日：2004-11-23

申请号：US09746462

申请日：2000-12-26

申请人： Gyula G. Jakab ,  Jose Noel N. Manceau ,  Dan V. Gorcea

发明人： Gyula G. Jakab ,  Jose Noel N. Manceau ,  Dan V. Gorcea

IPC分类号： H01F1706

CPC分类号： H04L27/0002 ,  H01F21/08 ,  H01F27/38 ,  H04L27/2601

摘要： The current technology involved with overlaying any type of digital subscriber loop (xDSL) service with plain old telephone service (POTS) makes use of two separate transformers, one for POTS and another for xDSL. This invention provides a transformer which combines the POTS transformer and the xDSL transformer into one transformer. This considerably reduces the weight volume and cost of the overlaid POTS and xDSL circuits. In combining the two transformers the magnetic coupling between any one of the windings used for POTS and any one of those used for xDSL must remain weak despite their close proximity. In addition, any two windings of the same type of service, either POTS or xDSL, must remain strongly coupled. This is achieved by choosing a special geometric form for the core and choosing strategic locations for the windings. A portion of the core is dedicated to serve as a shunt for each component of the magnetic field produced by the windings. Strongly coupled windings are wound around a same portion of the core whereas weakly coupled windings are wound around different core portions which are separated by the shunt.

摘要翻译： 涉及用普通老式电话服务（POTS）覆盖任何类型的数字用户环路（xDSL）服务的当前技术使用两个单独的变压器，一个用于POTS，另一个用于xDSL。 本发明提供了一种将POTS变压器和xDSL变压器组合成一个变压器的变压器。 这大大降低了覆盖的POTS和xDSL电路的重量体积和成本。 在组合两个变压器时，用于POTS的任何一个绕组与用于xDSL的绕组中的任何一个之间的磁耦合必须保持较弱，尽管其接近。 此外，同一类型的服务（POTS或xDSL）的任何两个绕组必须保持强耦合。 这是通过为核心选择特殊的几何形式并为绕组选择战略位置来实现的。 芯的一部分专用于用于由绕组产生的磁场的每个分量的分流。 强耦合绕组缠绕在芯的相同部分上，而弱耦合绕组缠绕在由分流器分开的不同芯部分上。

公开(公告)号：US06546235B1

公开(公告)日：2003-04-08

申请号：US09664373

申请日：2000-09-18

申请人： Dan V. Gorcea ,  Carl C. Anderson

发明人： Dan V. Gorcea ,  Carl C. Anderson

IPC分类号： H04B106

CPC分类号： H04B15/02 ,  H04B3/32

摘要： Generation of a compensation signal for canceling the distortion component of a distorted signal at an affected node, where the distortion component is caused by electro-magnetic coupling from a distortion-causing signal source. The distortion-causing signal is coupled into a distortion cancellation system using capacitive or electro-magnetic coupling techniques, resulting in the generation of an induced voltage. The induced voltage is fed to an impedance network and then to a plurality of cells, one for each of the affected nodes. The compensation signal appearing at the output of the cell is combined with the distorted signal at the corresponding affected node. By appropriately selecting the impedance values of the components in the corresponding cell, substantial cancellation of the distortion from the distortion-causing signal source can be achieved. The system can be simplified if the degree to which the distortion-causing signal source couples into the distorted signal is determined ahead of time.

摘要翻译： 产生补偿信号，用于消除受影响节点处的失真分量的失真分量，其中失真分量由来自失真引起信号源的电磁耦合引起。 使用电容或电磁耦合技术将失真引起信号耦合到失真消除系统中，导致产生感应电压。 感应电压被馈送到阻抗网络，然后被馈送到多个小区，每个小区为每个受影响的节点一个。 出现在单元输出端的补偿信号与相应受影响的节点处的失真信号相结合。 通过适当地选择相应单元中的分量的阻抗值，可以实现从失真引起信号源的失真的实质上的消除。 如果失真信号源耦合到失真信号的程度提前确定，则可以简化系统。

公开(公告)号：US06566947B2

公开(公告)日：2003-05-20

申请号：US09746422

申请日：2000-12-26

申请人： Dan V. Gorcea

发明人： Dan V. Gorcea

IPC分类号： H03F136

CPC分类号： H03H11/30

摘要： A line driver combining active impedance and filter in one stage for connection to a transmission line having a characteristic impedance. The line driver comprises an amplifier, a transformer with a primary to secondary winding ratio of 1:n, a reference impedance, an input impedance and two feedback impedances. The primary winding of the transformer has a first end connected to the output of the amplifier and the secondary winding is connectable to the transmission line. The reference resistor has an end connected to the second end of the first winding at a junction node and the feedback circuit is connected to the input and output of the amplifier and also to the junction node. The reference impedance has a value equal to n 2 K times the characteristic impedance of the transmission line. The feedback circuit is arranged to produce a voltage at the output of the amplifier substantially equal to (K+1) times the voltage at the junction node, for a predetermined value of K. This results in output impedance equal to n2 times the characteristic impedance of the transmission line. At the same time, the gain or filter function is set by the specifying the ratio of feedback impedance to the input impedance.

摘要翻译： 在一级中组合有源阻抗和滤波器的线路驱动器，用于连接到具有特征阻抗的传输线。 线路驱动器包括放大器，初级至次级绕组比为1：n的变压器，参考阻抗，输入阻抗和两个反馈阻抗。 变压器的初级绕组具有连接到放大器的输出的第一端，次级绕组可连接到传输线。 参考电阻器的一端在结节点处连接到第一绕组的第二端，并且反馈电路连接到放大器的输入和输出以及连接节点。 参考阻抗的值等于传输线的特性阻抗。 反馈电路被布置为在放大器的输出处产生基本上等于（K + 1）倍于接合节点处的电压的电压，以达到预定值K.这导致输出阻抗等于特性阻抗的n2倍 的传输线。 同时，通过指定反馈阻抗与输入阻抗的比例来设置增益或滤波器功能。

公开(公告)号：US06323733B1

公开(公告)日：2001-11-27

申请号：US09537721

申请日：2000-03-30

申请人： Dan V. Gorcea ,  David W. Foster ,  Kevin R Parker

发明人： Dan V. Gorcea ,  David W. Foster ,  Kevin R Parker

IPC分类号： H03F326

CPC分类号： H03F3/45475 ,  H03F1/0244 ,  H03F1/565 ,  H03F3/26 ,  H03F2200/541 ,  H04L27/2626

摘要： A power amplifier receives an input analog signal and generates a corresponding power amplified output analog signal. The power amplifier includes first and second power supply rails, an amplifier circuit, and a switch circuit. The first and second power supply rails are capable of supplying power having respective first and second predetermined levels, and a single predetermined polarity. The amplifier circuit is connected to receive the input analog signal and adapted to generate the output analog signal. Finally, the switch circuit is adapted to selectively connect one of the first and second power supply rails to the amplifier circuit.

摘要翻译： 功率放大器接收输入模拟信号并产生相应的功率放大输出模拟信号。 功率放大器包括第一和第二电源轨，放大器电路和开关电路。 第一和第二电源轨能够提供具有相应的第一和第二预定电平的电力以及单个预定极性。 放大器电路被连接以接收输入模拟信号并适于产生输出模拟信号。 最后，开关电路适于选择性地将第一和第二电源轨之一连接到放大器电路。

公开(公告)号：US06754288B2

公开(公告)日：2004-06-22

申请号：US09746421

申请日：2000-12-26

申请人： Dan V. Gorcea

发明人： Dan V. Gorcea

IPC分类号： H04L2510

CPC分类号： H04L27/0002 ,  H04L5/023 ,  H04L5/143 ,  H04L27/2647

摘要： A receiver which may be an xDSL receiver has improved dynamic range. The receiver has a first amplifier, a network of four impedances and a variable gain second amplifier. The variable gain second amplifier has an input connected to an ouput of the first amplifier, an output connected to the first amplifier, and a variable gain control input. The gain of the variable gain second amplifier is 1 K , and the pass-band gain of the receiver is K. By controlling the gain of the receiver with an AGC (automatic gain control), the receiver can amplify and filter inputs over a wide dynamic range with lower distortion and without saturation. Alternatively, the gain of the variable gain second amplifier is - 1 K . The four impedances can be arranged to realise low-pass or high-pass filters.

摘要翻译： 可以是xDSL接收机的接收机具有改善的动态范围。 接收器具有第一放大器，四个阻抗的网络和可变增益第二放大器。 可变增益第二放大器具有连接到第一放大器的输出的输入，连接到第一放大器的输出和可变增益控制输入。 可变增益第二放大器的增益和接收机的通带增益为K.通过使用AGC（自动增益控制）控制接收机的增益，接收机可以在较宽的动态范围内放大和滤波输入，较低 失真而不饱和。 或者，可变增益第二放大器的增益是可以设置四个阻抗来实现低通或高通滤波器。

公开(公告)号：US06681012B1

公开(公告)日：2004-01-20

申请号：US09466663

申请日：1999-12-20

申请人： Dan V. Gorcea ,  Robert M. Thomas

发明人： Dan V. Gorcea ,  Robert M. Thomas

IPC分类号： H04M100

CPC分类号： H04L27/0002

摘要： A directional coupler for a modem has a high common mode noise rejection characteristic with low transmit signal leakage, and reduced distortion of components mixed with a received signal. A primary filter network is connected to a communications circuit. The primary filter network has an output connected to an input of an amplifier. A feedback network is connected between the input and output of the amplifier. The primary filter network, the amplifier and the feedback network are arranged to provide a virtual ground at the input of the amplifier, and a filter characteristic which attenuates frequencies in the transmit signal band. The advantage is reduced component count while providing excellent transmit signal rejection and reducing received signal distortion.

摘要翻译： 用于调制解调器的定向耦合器具有高的共模噪声抑制特性，具有低的发射信号泄漏，并且减少了与接收信号混合的分量的失真。 主滤波器网络连接到通信电路。 主滤波器网络具有连接到放大器的输入的输出。 反馈网络连接在放大器的输入和输出之间。 主滤波器网络，放大器和反馈网络被布置成在放大器的输入处提供虚拟接地，以及滤波器特性，其衰减发射信号频带中的频率。 优点是减少了组件数量，同时提供了出色的发送信号抑制和减少接收信号失真。