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71.发明授权Method and apparatus for reducing distortion in a line powered modulator circuit 失效用于减少线路供电调制器电路中的失真的方法和装置公开(公告)号：US06763107B1
公开(公告)日：2004-07-13
申请号：US09431913
申请日：1999-11-02
申请人： Jonathan Herman Fischer , Keith Eugene Hollenbach , Donald Raymond Laturell , Lane A. Smith , Weilin Zhu
发明人： Jonathan Herman Fischer , Keith Eugene Hollenbach , Donald Raymond Laturell , Lane A. Smith , Weilin Zhu
IPC分类号： H04M900
CPC分类号： H04M19/001
摘要： A method and apparatus for a telephone line interface or data access arrangement (DAA) which includes a shunt regulator in series with a line modulator. A sense resistor is placed in series between the shunt regulator and the line modulator to provide a measurement of the amount of current distortion in the DAA. The line modulator contains a Darlington pair which reduces the amount of current drawn by the line modulator, allowing the sense resistor to sense a majority of the system current. The voltage across the sense resistor is fed back to the line modulator. The line modulator is capable of adjusting the AC modulation and the DC termination presented to the telephone line. The method includes drawing power from the telephone line using a shunt regulator, modulating the telephone line in series with the shunt regulator, sensing a level of distortion in the DAA, and feeding the sensed level of distortion to the line modulator.
摘要翻译： 一种用于电话线接口或数据访问装置（DAA）的方法和装置，其包括与线路调制器串联的分流调节器。 在分流调节器和线路调制器之间串联一个检测电阻，以提供DAA中电流失真量的测量。 线路调制器包含一个达林顿对，减少线路调制器吸收的电流量，允许检测电阻感测系统电流的大部分。 检测电阻两端的电压反馈到线路调制器。 线路调制器能够调整AC调制和提供给电话线的DC终端。 该方法包括使用分流调节器从电话线中抽取功率，调制与分流调节器串联的电话线，感测DAA中的失真水平，以及将感测到的失真电平馈送到线路调制器。
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公开(公告)号：US06466650B1
公开(公告)日：2002-10-15
申请号：US09592863
申请日：2000-06-13
IPC分类号： H04M124
摘要： Telephone line service type identification is provided to a telephone technician in the field by the placement of one or more tuned circuit(s) across the telephone line. In one embodiment, an inexpensive tuned circuit such as a ceramic resonator forms a telecom service resonator ID device which is placed across a telephone line, either at the central office or at the customer premises. Injection of a test current at a predetermined frequency, and a suitable amplitude of the same indicates to the technician aspects of telecom service to that particular telephone line (e.g., the existence of POTS, ISDN, and/or xDSL) and or use of the telephone line by a home network such as HPNA. In another embodiment, a telecom service transponder ID device is formed to provide line service identification to an interrogating line technician. The telecom service transponder ID device is activated when the test signal including an appropriate frequency is present to cause excitation in the telecom service transponder ID device. The resonator and transponder devices preferably have very high impedances at all frequencies except at the desired resonant frequency, and thus avoids violation of telephone service standards. The resonator or transponder ID devices may be placed anywhere along the telephone line, but preferably at the customer premises, or in installed equipment utilizing the telephone line. More than one resonation frequency may be implemented with parallel tuned circuits to indicate additional features of service on the telephone line (e.g., the number of services, the existence of a data service, etc.). The frequencies of resonance of the tuned circuits are preferably chosen to exist between the spectrum utilized by the various operating services.
摘要翻译： 通过在电话线路上放置一个或多个调谐电路，在现场向电话技术人员提供电话线服务类型识别。 在一个实施例中，诸如陶瓷谐振器的便宜的调谐电路形成电信服务谐振器ID设备，其被布置在电话线路上，无论是在中心局还是在客户驻地处。 以预定频率注入测试电流，并且其适当的幅度指示给该特定电话线的电信服务的技术人员方面（例如，POTS，ISDN和/或xDSL的存在）和/或使用 电话线由家庭网络如HPNA。 在另一个实施例中，形成电信服务转发器ID设备以向询问线技术人员提供线路服务识别。 当存在包括适当频率的测试信号以引起电信业务转发器ID设备中的激励时，电信业务应答器ID设备被激活。 除了在期望的谐振频率之外，谐振器和应答器装置优选地在所有频率处具有非常高的阻抗，并且因此避免违反电话服务标准。 谐振器或应答器ID设备可以放置在电话线的任何地方，但优选地位于客户住宅处，或者在使用电话线路的安装设备中。 可以使用并行调谐电路来实现多于一个谐振频率以指示电话线上的服务的附加特征（例如，服务的数量，数据服务的存在等）。 调谐电路的谐振频率优选地被选择为存在于由各种操作服务使用的频谱之间。
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公开(公告)号：US20130009679A1
公开(公告)日：2013-01-10
申请号：US13178812
申请日：2011-07-08
申请人： Vladimir Sindalovsky , Lane A. Smith , Jung Cho
发明人： Vladimir Sindalovsky , Lane A. Smith , Jung Cho
IPC分类号： H03L7/06
摘要： In described embodiments, a clock alignment system with a digital bang-bang phase detector (BBPD) employs digitally implemented hysteresis. A first BBPD is employed for a phase control loop that compares the phases from two different clock domain sources, where one clock domain source is used as a reference clock for the phase control loop. A second BBPD with delayed reference clock is employed to resolve ambiguous phase relations seen by the first BBPD. An initial state of a BBPD vector, defined as a vector of current values of the first BBPD and the second BBPD, is examined. Based on the initial and subsequent states of the BBPD vector, the non-reference clock is permitted to naturally move to a lock state through action of the phase control loop, or forced to have its phase rotate clockwise or counterclockwise to reach the lock state.
摘要翻译： 在所描述的实施例中，具有数字爆炸相位检测器（BBPD）的时钟对准系统采用数字实现的滞后。 第一个BBPD被用于相位控制环路，该相位控制环路比较来自两个不同时钟域源的相位，其中一个时钟源源作为相位控制环路的参考时钟。 采用具有延迟参考时钟的第二个BBPD来解决第一个BBPD所看到的模糊相位关系。 检查被定义为第一BBPD和第二BBPD的当前值的矢量的BBPD矢量的初始状态。 基于BBPD矢量的初始状态和后续状态，允许非参考时钟通过相位控制回路的动作自然地移动到锁定状态，或者被迫使其相位顺时针或逆时针旋转以达到锁定状态。
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公开(公告)号：US08067966B2
公开(公告)日：2011-11-29
申请号：US10999900
申请日：2004-11-30
IPC分类号： H03L7/00
CPC分类号： H03L7/10 , H03L7/0814 , H03L7/087 , H04L7/0337
摘要： A voltage controlled delay loop and method are disclosed for clock and data recovery applications. The voltage controlled delay loop generates clock signals having similar frequency and different phases. The voltage controlled delay loop comprises a plurality of delay elements; and an input that selectively injects a reference clock into any one of the plurality of delay elements. The plurality of delay elements are connected in series, such as in a loop. In one exemplary implementation, each delay element has an associated multiplexer that selects one of the reference clock and a signal from a previous delay element.
摘要翻译： 公开了用于时钟和数据恢复应用的电压控制延迟环路和方法。 电压控制延迟环路产生具有相似频率和不同相位的时钟信号。 电压控制延迟环包括多个延迟元件; 以及输入，其选择性地将参考时钟注入到所述多个延迟元件中的任一个中。 多个延迟元件串联连接，例如循环。 在一个示例性实现中，每个延迟元件具有相关联的多路复用器，其选择参考时钟之一和来自先前延迟元件的信号。
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公开(公告)号：US07912210B2
公开(公告)日：2011-03-22
申请号：US12187456
申请日：2008-08-07
IPC分类号： H04M1/00
CPC分类号： H04L25/0266 , H04M11/06
摘要： A system for improving the attenuation of an undesired signal found in a differential signal path through the use of inductive coupling. The system includes a primary inductor, a secondary inductor, and a filter. The primary inductor and the secondary inductor operably couple an input differential signal pair to an output differential signal pair, and the filter attenuates an undesired signal in the output differential signal pair.
摘要翻译： 一种用于通过使用电感耦合来改善在差分信号路径中发现的不期望信号的衰减的系统。 该系统包括初级电感器，次级电感器和滤波器。 主电感器和次级电感器将输入差分信号对可操作地耦合到输出差分信号对，并且滤波器衰减输出差分信号对中的不期望信号。
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公开(公告)号：US07773667B2
公开(公告)日：2010-08-10
申请号：US11181286
申请日：2005-07-14
CPC分类号： G01R31/31715
摘要： The various embodiments of the invention provide an apparatus, system and method of asynchronous testing a serializer and deserializer data communication apparatus (SERDES) for determining frequency and phase locking to pseudo asynchronous input data having a continual phase offset. An exemplary apparatus includes a data sampler adapted to sample input serial data and to provide output data; a controlled tap delay with a selected tap having a phase offset from the input serial data, in which the selected tap is selectively coupleable to the data sampler to provide pseudo asynchronous input serial data; a first variable delay control adapted to delay a reference frequency provided to the controlled tap delay in response to the pseudo asynchronous input serial data; and a second delay control adapted to adjust the plurality of taps in response to the pseudo asynchronous input serial data. In additional embodiments, the pseudo asynchronous input serial data is provided from an interpolated phase from at least two selected taps.
摘要翻译： 本发明的各种实施例提供了用于确定频率和相位锁定到具有连续相位偏移的伪异步输入数据的串行器和解串器数据通信装置（SERDES）的异步测试的装置，系统和方法。 示例性装置包括适于对输入串行数据进行采样并提供输出数据的数据采样器; 具有与输入串行数据相位偏移的所选抽头的受控抽头延迟，其中所选择的抽头选择性地耦合到数据采样器以提供伪异步输入串行数据; 第一可变延迟控制器，其适于响应于所述伪异步输入串行数据延迟提供给受控抽头延迟的参考频率; 以及适于响应于所述伪异步输入串行数据来调整所述多个抽头的第二延迟控制。 在另外的实施例中，伪异步输入串行数据从来自至少两个选择的抽头的内插相位提供。
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77.发明申请Methods And Apparatus For Determining Receiver Filter Coefficients For A Plurality Of Phases 有权用于确定多个相位的接收器滤波器系数的方法和装置公开(公告)号：US20090097541A1
公开(公告)日：2009-04-16
申请号：US11870908
申请日：2007-10-11
申请人： Pervez M. Aziz , Mohammad S. Mobin , Lane A. Smith
发明人： Pervez M. Aziz , Mohammad S. Mobin , Lane A. Smith
IPC分类号： H03H7/30
CPC分类号： H04L1/205
摘要： Methods and apparatus are provided for determining receiver filter coefficients for a plurality of phases. One or more coefficients for a receiver filter are determined by determining a first coefficient for a first phase of a data eye; and determining a second coefficient for a second phase of the data eye. The receiver filter may be, for example, a decision-feedback equalizer. The first and second coefficients may be determined by performing an LMS adaptation of decision-feedback equalization coefficients. In another embodiment, the first and second coefficients may be determined by obtaining eye opening metrics from a data eye monitor corresponding to each of the respective first phase and the second phase; and determining the respective first and second coefficients based on the eye opening metrics. The first and second phases can correspond to odd and even phases.
摘要翻译： 提供了用于确定多个相位的接收机滤波器系数的方法和装置。 通过确定数据眼的第一阶段的第一系数来确定接收机滤波器的一个或多个系数; 以及确定所述数据眼睛的第二阶段的第二系数。 接收机滤波器可以是例如判决反馈均衡器。 可以通过执行判决反馈均衡系数的LMS适应来确定第一和第二系数。 在另一个实施例中，可以通过从对应于相应的第一阶段和第二阶段中的每一个的数据眼睛监视器获得眼睛开度度量来确定第一和第二系数; 以及基于所述眼睛开度度量确定相应的第一和第二系数。 第一和第二相可以对应于奇数和偶数相。
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公开(公告)号：US20090028320A1
公开(公告)日：2009-01-29
申请号：US12187456
申请日：2008-08-07
IPC分类号： H04M3/22
CPC分类号： H04L25/0266 , H04M11/06
摘要： A system for improving the attenuation of an undesired signal found in a differential signal path through the use of inductive coupling. The system includes a primary inductor, a secondary inductor, and a filter. The primary inductor and the secondary inductor operably couple an input differential signal pair to an output differential signal pair, and the filter attenuates an undesired signal in the output differential signal pair.
摘要翻译： 一种用于通过使用电感耦合来改善在差分信号路径中发现的不期望信号的衰减的系统。 该系统包括初级电感器，次级电感器和滤波器。 主电感器和次级电感器将输入差分信号对可操作地耦合到输出差分信号对，并且滤波器衰减输出差分信号对中的不期望信号。
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公开(公告)号：US07378906B2
公开(公告)日：2008-05-27
申请号：US11672272
申请日：2007-02-07
IPC分类号： H03F1/26
CPC分类号： H03F1/3241 , H03F2200/468
摘要： A pre-distorter that compensates for amplitude and phase distortion created by an amplifier. During a training session, the amplifier is stimulated with input signals of pre-selected amplitude and phase at various temperatures and the amplifier output is captured and converted into data sets. Polynomials are then fitted to the data sets and inverses of the polynomials are determined. The coefficients of the inverse polynomials are then saved for each temperature. During operation, the amplifier temperature is predicted based on the amplifier input signal and the coefficients associated with the predicted temperature are selected to be applied to the input signal to compensate for amplitude and phase distortion caused by the amplifier.
摘要翻译： 一个预失真器，用于补偿放大器产生的幅度和相位失真。 在训练期间，放大器用各种温度的预选幅度和相位的输入信号进行激励，并且放大器输出被捕获并转换为数据集。 然后将多项式拟合到数据集中，并确定多项式的倒数。 然后针对每个温度保存逆多项式的系数。 在操作期间，基于放大器输入信号预测放大器温度，并且选择与预测温度相关联的系数以施加到输入信号以补偿由放大器引起的幅度和相位失真。
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公开(公告)号：US07095848B1
公开(公告)日：2006-08-22
申请号：US09366614
申请日：1999-08-03
摘要： A system for powering up an electronic circuit with telephone line power such that the electronic circuit does not enter a lockup state. The system includes a voltage detector that measures the voltage across the telephone line and a switch coupled with the voltage detector. The voltage detector generates a Reset signal when the measured voltage exceeds a selected voltage level, and the switch applies power to the electronic circuit in response to the generated Reset signal.
摘要翻译： 一种用于通过电话线电源为电子电路供电的系统，使得电子电路不进入锁定状态。 该系统包括测量电话线上的电压的电压检测器和与电压检测器耦合的开关。 电压检测器在测量电压超过所选电压电平时产生复位信号，开关响应于产生的复位信号向电子电路供电。
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