公开(公告)号：US20180167048A1

公开(公告)日：2018-06-14

申请号：US15835148

申请日：2017-12-07

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Sun Woo KONG ,  Cheol Ho KIM ,  Bong Hyuk PARK ,  Hui Dong LEE

IPC分类号： H03H7/40 ,  H03F3/19 ,  H03F1/56 ,  H04M1/76 ,  H01F27/29 ,  H03H11/32 ,  H03H7/09

CPC分类号： H03H7/40 ,  H01F27/29 ,  H03F1/565 ,  H03F3/19 ,  H03F3/193 ,  H03F2200/222 ,  H03F2200/492 ,  H03F2200/534 ,  H03F2200/541 ,  H03H7/09 ,  H03H7/38 ,  H03H11/32 ,  H04M1/76

摘要： A matching circuit in a communication apparatus may comprise a first inductor disposed at a primary side of a transformer; a second inductor disposed at a secondary side of the transformer; and an impedance element connected to the first inductor and the second inductor. Also, a first terminal of the first inductor may be connected to an input terminal of the transformer, a second terminal of the first inductor may be connected to a common node connected to a ground, a first terminal of the second inductor may be connected to an output terminal of the transformer, a second terminal of the second inductor may be connected to the common node, a first terminal of the impedance element may be connected to the common node, and a second terminal of the impedance element may be connected to the ground.

公开(公告)号：US20130223620A1

公开(公告)日：2013-08-29

申请号：US13641758

申请日：2011-10-20

申请人： Zhuwei Yu

发明人： Zhuwei Yu

IPC分类号： H04M1/76

CPC分类号： H03H11/30 ,  H03H7/40 ,  H04M1/76

摘要： A method and circuit for matching impedance, wherein, a peripheral impedance detection module detects the user telephone impedance and outputs information about the user telephone impedance; an analog switch handover module provides an impedance matching path between the user telephone impedance and an impedance matching module according to information about the user telephone impedance output by the peripheral impedance detection module; the impedance matching module provides a corresponding impedance to match the user telephone impedance through the impedance matching path provided by the analog switch handover module. The above-mentioned technical scheme realizes the impedance matching when communicating between a wireless access box and telephones with different impedance modes. The matching process is automatic and flexible and does not need the manual configuration, and the realization technology is simple and reliable, and the cost is low.

摘要翻译： 一种用于匹配阻抗的方法和电路，其中，外围阻抗检测模块检测用户电话阻抗并输出关于用户电话阻抗的信息; 根据关于由外围阻抗检测模块输出的用户电话阻抗的信息，模拟切换切换模块在用户电话阻抗和阻抗匹配模块之间提供阻抗匹配路径; 阻抗匹配模块通过由模拟开关切换模块提供的阻抗匹配路径提供相应的阻抗以匹配用户电话阻抗。 上述技术方案在无线接入盒和具有不同阻抗模式的电话之间进行通信时实现阻抗匹配。 匹配过程自动灵活，不需要手动配置，实现技术简单可靠，成本低廉。

公开(公告)号：US08401174B1

公开(公告)日：2013-03-19

申请号：US12372902

申请日：2009-02-18

申请人： John Whitehouse ,  Scott Dendy

发明人： John Whitehouse ,  Scott Dendy

IPC分类号： H04M1/00 ,  H04M9/00 ,  H04M7/04

CPC分类号： H04B3/23 ,  H04B3/493 ,  H04M1/24 ,  H04M1/2535 ,  H04M1/76 ,  H04M3/18

摘要： A system and method in accordance with a non-limiting aspect minimizes echo return loss in a communications system. The dial tone is broken on an analog telephone line connected to a hybrid circuit having selectable impedance configurations and that interfaces a digital communications circuit and the analog telephone line. After the telephone line is quiet, a white noise signal as a test call is inserted through the hybrid circuit onto the analog telephone line corresponding to a selected impedance setting configuration. The returned white noise signal is used for measuring the echo return loss corresponding to the selected impedance setting configuration. The test call is dropped. This process is repeated with multiple test calls each at a selectively different impedance setting configuration to obtain echo return loss measurements at each of the impedance setting configurations. The optimum impedance setting configuration is determined based on the results determined from the different test calls. The optimum impedance setting configuration is applied to the hybrid and typically set during a running telephone configuration.

摘要翻译： 根据非限制性方面的系统和方法使通信系统中的回波损耗最小化。 在连接到具有可选阻抗配置的混合电路并且连接数字通信电路和模拟电话线的模拟电话线上，拨号音被破坏。 在电话线路静音之后，将作为测试呼叫的白噪声信号通过混合电路插入到对应于所选阻抗设置配置的模拟电话线路上。 返回的白噪声信号用于测量与所选阻抗设置配置相对应的回波回波损耗。 测试呼叫被丢弃。 通过多个测试呼叫重复该过程，每个测试呼叫以选择性不同的阻抗设置配置来实现，以在每个阻抗设置配置下获得回波回波损耗测量。 基于从不同测试呼叫确定的结果确定最佳阻抗设置配置。 最佳阻抗设置配置应用于混合电路，并且通常在运行的电话配置期间设置。

公开(公告)号：US08357013B2

公开(公告)日：2013-01-22

申请号：US12613501

申请日：2009-11-05

申请人： Tatsuya Arai ,  Ching-Chao Huang ,  Clement Kam Lam Luk ,  Jeremy Buan ,  Tsutomu Matsuo ,  Toshiyuki Takada ,  Masakazu Nagata

发明人： Tatsuya Arai ,  Ching-Chao Huang ,  Clement Kam Lam Luk ,  Jeremy Buan ,  Tsutomu Matsuo ,  Toshiyuki Takada ,  Masakazu Nagata

IPC分类号： H01R24/00

CPC分类号： H04M1/76 ,  H05K1/0245 ,  H05K2201/09245 ,  H05K2201/10689

摘要： The present invention involves connectors for reducing Far-End Crosstalk (FEXT) through the use of novel polarity swapping to negate the cumulative effect of FEXT. Skew adjustment is used to improve the FEXT cancellation from polarity swapping. The polarity reversal location or locations among FEXT sources are optimized to achieve maximum FEXT cancellation. The novelty polarity swapping technique can be applied to a wide variety of connectors, such as mezzanine connectors, backplane connectors, and any other connectors that can benefit from FEXT reduction.

摘要翻译： 本发明涉及通过使用新的极性交换来减少FEXT的累积效应来减少远端串扰（FEXT）的连接器。 倾斜调整用于改善极性交换中的FEXT消除。 FEXT源中的极性反转位置或位置被优化，以实现最大的FEXT取消。 新颖的极性交换技术可以应用于各种连接器，例如夹层连接器，背板连接器以及可以从FEXT减少中受益的任何其他连接器。

公开(公告)号：US20060215771A1

公开(公告)日：2006-09-28

申请号：US11398090

申请日：2006-04-05

申请人： Jeffrey Scott ,  Navdeep Sooch ,  David Welland

发明人： Jeffrey Scott ,  Navdeep Sooch ,  David Welland

IPC分类号： H04L25/00

CPC分类号： H04M1/573 ,  H04L7/033 ,  H04L25/0266 ,  H04L25/06 ,  H04M1/76 ,  H04M3/007 ,  H04M11/06 ,  H04M19/001 ,  H04M19/02

摘要： An isolation system is provided that is suitable for use in telephony, medical instrumentation, industrial process control and other applications. Preferred embodiments of the invention comprise a capacitive isolation barrier across which a digital signal is communicated. The system provides a means of communication across the isolation barrier that is highly immune to amplitude and phase noise interference. Clock recovery circuitry may be employed on one side of the isolation barrier to extract timing information from the digital signal communicated across the barrier, and to filter the effects of phase noise introduced at the barrier. Delta-sigma converters may be disposed on both sides of the isolation barrier to convert signals between analog and digital domains. An isolated power supply may also be provided on the isolated side of the barrier, whereby direct current is generated in response to the digital data received across the isolation barrier. Finally, a bidirectional isolation system is provided whereby bidirectional communication of digital signals is accomplished using a single pair of isolation capacitors. In preferred embodiments, the digital data communicated across the barrier consists of digital delta-sigma data signals multiplexed in time with other digital control, signaling and framing information.

公开(公告)号：US20050025307A1

公开(公告)日：2005-02-03

申请号：US10632745

申请日：2003-08-01

申请人： Hui Xu ,  Janet Yun

发明人： Hui Xu ,  Janet Yun

IPC分类号： G06F3/00 ,  H03K19/0185 ,  H04B1/40 ,  H04L25/02 ,  H04M1/76 ,  H04M7/04 ,  H04M1/00 ,  H04M9/00

CPC分类号： H04M1/76

摘要： Configurable communications modules and methods of making the same are described. In one aspect, a communications module includes a data channel and a termination impedance controller. The data channel is operable to translate data signals in at least one direction between a transmission cable interface and a host device interface. The data channel has a variably configurable termination impedance at a host device node that is connectable to a host device. The termination impedance controller is operable to set the variably configurable termination impedance of the data channel to match the termination impedance to the host system.

摘要翻译： 描述可配置的通信模块及其制造方法。 一方面，通信模块包括数据信道和终端阻抗控制器。 数据信道可操作以在传输电缆接口和主机设备接口之间的至少一个方向上翻译数据信号。 数据通道在可连接到主机设备的主机设备节点处具有可变配置的终端阻抗。 终端阻抗控制器可操作地设置数据信道的可变配置的终端阻抗以匹配终端阻抗到主机系统。

公开(公告)号：US20030112960A1

公开(公告)日：2003-06-19

申请号：US10119485

申请日：2002-04-10

申请人： ADC DSL Systems, Inc.

发明人： Jie Dong Wang

IPC分类号： H04M001/00 ,  H04M009/00

CPC分类号： H04M1/76

摘要： Cascade low-pass filters are useful in attenuating the xDSL band in a POTS splitter. The design of the low-pass filter is a sixth-order filter having two stages. A first stage includes a fourth-order filter, preferably with a stop-band frequency of approximately 48 kHz. A second stage includes a second-order filter in cascade with the fourth-order filter. For this filter, the stop-band frequency is preferably approximately 29 kHz. The inductance value of the second stage is relatively small in comparison to the inductance values of the first stage. In this manner, improvements in xDSL band attenuation are facilitated with little or no eroding of the voice band performance such as insertion loss, pass-band attenuation and return loss.

摘要翻译： 级联低通滤波器可用于衰减POTS分离器中的xDSL频带。 低通滤波器的设计是具有两级的六阶滤波器。 第一级包括四级滤波器，优选具有约48kHz的阻带频率。 第二级包括与四阶滤波器级联的二阶滤波器。 对于该滤波器，阻带频率优选为大约29kHz。 与第一级的电感值相比，第二级的电感值相对较小。 以这种方式，通过很少或没有侵扰诸如插入损耗，通带衰减和回波损耗的语音带性能来促进xDSL频带衰减的改进。

公开(公告)号：US20030081761A1

公开(公告)日：2003-05-01

申请号：US10278927

申请日：2002-10-22

发明人： James T. Schley-May

IPC分类号： H04M001/00 ,  H04M009/00

CPC分类号： H04M1/76 ,  H04M1/58

摘要： A system for matching impedance in the circuitry of an xDSL communication device to improve noise cancellation resulting from signal leakage between transmit and receive signals. The system for matching impedance includes a transformer configured to couple an impedance, which is substantially equal to a line impedance, to a line coupling transformer, and is applicable to all known hybrid topologies. The transformer is ideally as closely matched to the line coupling transformer as possible. This technique allows greatly improved impedance matching in the hybrid, which directly benefits the performance of xDSL communication devices.

摘要翻译： 一种用于匹配xDSL通信设备的电路中的阻抗的系统，以改善由发射和接收信号之间的信号泄漏引起的噪声消除。 用于匹配阻抗的系统包括被配置为将基本上等于线路阻抗的阻抗耦合到线路耦合变压器的变压器，并且可应用于所有已知的混合拓扑。 变压器理想地与线路耦合变压器尽可能匹配。 这种技术允许在混合动力系统中大大改善阻抗匹配，这直接有利于xDSL通信设备的性能。

公开(公告)号：US06275582B1

公开(公告)日：2001-08-14

申请号：US09466739

申请日：1999-12-17

申请人： Stanley Pietrowicz

发明人： Stanley Pietrowicz

IPC分类号： H04M100

CPC分类号： H04M1/76 ,  H04M1/573

摘要： Apparatus for interconnecting the Tip and Ring telephone line interface to subsequent communications equipment or circuits through a differential line bridge circuit that extracts one or more unidirectional paths containing predominantly far-end energy, wherein, near-end speech signals have been canceled. The differential line bridge circuit maintains the longitudinal balance of the telephone line and exhibits improved noise immunity in the recovered far-end signal. It permits all telephone supervisory, alerting and bidirectional communication signals to pass transparently between the telephone line interface and the subsequent communications equipment or circuits. Access to on-hook service signals, such as calling party identification and short text messaging data transmissions, is inherently provided by the line bridge. By employing one or more selectable networks in the line bridge, the bridge is able to adapt to the characteristics of the telephone line and provide scalable near-end speech cancellation is disclosed.

摘要翻译： 用于通过差分线路桥接电路将Tip和Ring电话线接口互连到后续通信设备或电路的装置，该差分线路电路提取包含主要是远端能量的一个或多个单向路径，其中近端语音信号已被取消。 差分线桥电路保持电话线的纵向平衡，并且在恢复的远端信号中表现出改善的抗噪声能力。 它允许所有电话监控，警报和双向通信信号在电话线路接口和随后的通信设备或电路之间透明地通过。 通过线桥固有地提供对诸如呼叫方识别和短文本消息传送数据传输之类的挂机服务信号的访问。 通过在线路桥中采用一个或多个可选择的网络，桥接器能够适应电话线路的特性并且提供可扩展的近端语音消除。

公开(公告)号：US6081593A

公开(公告)日：2000-06-27

申请号：US30317

申请日：1998-02-25

申请人： Yeong-Woo Kim

发明人： Yeong-Woo Kim

IPC分类号： H04M11/10 ,  H04B3/23 ,  H04M1/76 ,  H04M1/19

CPC分类号： H04B3/23 ,  H04M1/76

摘要： A method for transmitting white noise for echo cancellation in the voice mail system (VMS) for providing voice guidance message services to callers connected with switchboard is characterized in that specified ring-back tone signals are transmitted to the switchboard with the white noise being inserted between the ring-back tone signals.

摘要翻译： 在用于向与交换机连接的呼叫者提供语音指导消息服务的语音邮件系统（VMS）中发送用于回波消除的白噪声的方法的特征在于，指定的回铃音信号被发送到交换机，其中白噪声被插入在 回铃音信号。