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1. 发明授权

US06553118B1 Method and apparatus for calculating DC offset in a digital gyrator 失效
标题翻译：用于计算数字旋转器中的直流偏移的方法和装置
公开(公告)号：US06553118B1
公开(公告)日：2003-04-22
申请号：US09378771
申请日：1999-08-20
申请人： Lane A. Smith , Steven Brooke Witmer , Jonathan Herman Fischer , Donald Raymond Laturell
发明人： Lane A. Smith , Steven Brooke Witmer , Jonathan Herman Fischer , Donald Raymond Laturell
IPC分类号： H04M900
CPC分类号： H04M1/738 , H04M19/001
摘要： A method and apparatus for controlling the DC line current on a telephone line and reducing the amount of error introduced to the system. The error is reduced by compensating for a DC error term introduced by an analog to digital converter having a DC offset. The DC offset is controlled digitally, allowing software to be used to limit the DC error in accordance with predefined parameters. Predefined parameters can be set to accommodate varying country specifications instead of using switches to control resistors and capacitors. In addition, changes in a country's requirements can be accomplished through software, instead of changing components or redesigning a circuit board. The use of software results in increased flexibility by allowing an infinite number of settings via software or software updates, allowing changes to be made quickly and easily throughout the world, and allowing error terms to be accommodated digitally.
摘要翻译：一种用于控制电话线上的直流线路电流并减少引入系统的误差量的方法和装置。通过补偿由具有DC偏移的模数转换器引入的DC误差项来减小误差。 DC偏移受数字控制，允许软件根据预定义的参数来限制直流误差。可以设置预定义参数以适应不同的国家规格，而不是使用开关来控制电阻器和电容器。另外，一个国家要求的变化可以通过软件来实现，而不是改变组件或重新设计电路板。使用软件可以通过软件或软件更新实现无限数量的设置，从而提高灵活性，允许在全球范围内快速，轻松地进行更改，并允许数字化地容纳错误条款。

2. 发明授权

US06763107B1 Method and apparatus for reducing distortion in a line powered modulator circuit 失效
标题翻译：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。

3. 发明授权

US06215429B1 Distributed gain for audio codec 有权
标题翻译：音频编解码器的分布式增益
公开(公告)号：US06215429B1
公开(公告)日：2001-04-10
申请号：US09232221
申请日：1999-01-19
申请人： Jonathan Herman Fischer , Donald Raymond Laturell , Lane A. Smith , Paul David Hendricks , James M. Little
发明人： Jonathan Herman Fischer , Donald Raymond Laturell , Lane A. Smith , Paul David Hendricks , James M. Little
IPC分类号： H03M162
CPC分类号： H03H17/0411 , H03H17/0288
摘要： An integrated circuit, e.g. an AC '97 conforming audio codec, includes a digital filter and gain module including multiple channels of gain control and multiple channels of digital filtering. A gain control module includes an overflow check of data samples requiring differing lengths of clamping. Each channel of the digital filter includes a finite impulse response (FIR) filter, and an infinite impulse response (IIR) filter. The digital filtering is implemented largely in hardware independent of the number of channels required and/or independent of the required order of the filtering. Thus, filter channels can be added or additional filtering implemented merely by increasing the clock speed without changing the digital filter design. The FIR filter is capable of being reset each frame to prevent a DC buildup at internal nodes. The IIR filter performs a plurality of 2nd order biquadratic equations in an overall average of as few as four clock cycles per 2nd order biquad. A RAM is used to store the state variables for the 2nd order biquadratic equations. The state variable RAM is reset by controlling the clear input of latches at an input and/or the output of the state variable RAM, and the state variable RAM is addressed by a delta counter which is independent of the particular number of filter channels or filter orders implemented. Test patterns may be inserted between functional blocks of an integrated circuit such as the disclosed audio codec by appropriate control of the preset and clear inputs to output latches of the functional blocks.
摘要翻译：集成电路，例如符合AC '97标准的音频编解码器包括数字滤波器和增益模块，包括多个通道的增益控制和多个数字滤波通道。增益控制模块包括需要不同夹持长度的数据样本的溢出检查。数字滤波器的每个通道包括有限脉冲响应（FIR）滤波器和无限脉冲响应（IIR）滤波器。数字滤波主要在硬件上实现，与所需信道数量和/或独立于滤波所需的顺序无关。因此，可以仅通过增加时钟速度而不改变数字滤波器设计来增加滤波器通道或附加滤波。 FIR滤波器能够复位每个帧，以防止在内部节点处产生DC积累。 IIR滤波器执行多个二阶二次方程，其总平均值为每二阶二进制数四个时钟周期。 RAM用于存储二阶二次方程的状态变量。通过控制状态变量RAM的输入端和/或输出端的锁存器的清零输入来复位状态变量RAM，并且状态变量RAM通过与滤波器通道或滤波器的特定数量无关的增量计数器来寻址订单执行。可以通过适当地控制预设和清除输入来输出功能块的锁存器，将测试模式插入诸如公开的音频编解码器的集成电路的功能块之间。

4. 发明授权

US06665403B1 Digital gyrator 失效
标题翻译：数字旋转器
公开(公告)号：US06665403B1
公开(公告)日：2003-12-16
申请号：US09310021
申请日：1999-05-11
申请人： Jonathan Herman Fischer , Donald Raymond Laturell , Lane A. Smith
发明人： Jonathan Herman Fischer , Donald Raymond Laturell , Lane A. Smith
IPC分类号： H04M100
CPC分类号： H04M19/001 , H04M1/738
摘要： A digital device for controlling the DC line current on a telephone line which includes a digital device that utilizes a digital filter for setting the DC line current. By controlling the DC line current digitally, software can be used to set the DC line current in accordance with predefined characteristics. Predefined characteristics can be set to accommodate varying country specifications instead of using switches to control resistors and capacitors. In addition, changes in a country's requirements can be accomplished through software, instead of changing components or redesigning a circuit board. The device also incorporates a method for maintaining DC current level during changes in digital filter characteristics. The use of software results in increased flexibility by allowing an infinite number of settings via software or software updates, and allowing changes to be made quickly and easily throughout the world.
摘要翻译：一种用于控制电话线路上的直流线路电流的数字装置，其包括利用数字滤波器设置直流线路电流的数字装置。通过数字控制直流线路电流，可以使用软件根据预定义的特性设置直流线路电流。预定义的特性可以设置为适应不同的国家规范，而不是使用开关来控制电阻和电容。另外，一个国家要求的变化可以通过软件来实现，而不是改变组件或重新设计电路板。该器件还包括在数字滤波器特性变化期间维持直流电流水平的方法。使用软件可以通过软件或软件更新实现无限数量的设置，从而提高灵活性，并允许在全球范围内快速，轻松地进行更改。

5. 发明授权

US06728371B1 Method and apparatus for stabilization of a line powered modulator circuit 失效
标题翻译：用于稳定线路供电调制器电路的方法和装置
公开(公告)号：US06728371B1
公开(公告)日：2004-04-27
申请号：US09442544
申请日：1999-11-18
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： H04M100
CPC分类号： H04M19/001
摘要： A method and apparatus for a data access arrangement (DAA) which includes a line modulator containing capacitive elements to increase system stability. The invention provides improved stability during system startup and normal system operation. The line modulator is capable of adjusting the AC modulation and the DC termination presented to the telephone line. Capacitive elements are added to the modulator to provide enhanced system stability. The method includes drawing power from the telephone line, modulating the telephone line, sensing a level of distortion through the line modulator, feeding the sensed level of distortion to the line modulator, and using capacitive circuits to provide additional system stability.
摘要翻译：一种用于数据存取装置（DAA）的方法和装置，其包括一个包含电容元件的线路调制器以增加系统稳定性。本发明提供了在系统启动和正常系统操作期间的改进的稳定性。线路调制器能够调整AC调制和提供给电话线的DC终端。将电容元件添加到调制器以提供增强的系统稳定性。该方法包括从电话线路中抽取电力，调制电话线路，通过线路调制器感测失真水平，将感测到的失真电平馈送到线路调制器，以及使用电容电路来提供额外的系统稳定性。

6. 发明授权

US06621904B1 Pre-charging line modem capacitors to reduce DC setup time 失效
标题翻译：预充电线路调制解调器电容器，以减少直流建立时间
公开(公告)号：US06621904B1
公开(公告)日：2003-09-16
申请号：US09407444
申请日：1999-09-29
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： H04M100
CPC分类号： H04M19/005 , H04M1/7385
摘要： A circuit provides a modulation signal to an input terminal of a line modulator which places a line current modulated in accordance with the modulation signal on a telephone line. An amplifier of the circuit amplifies an analog input signal to provide the modulation signal at an output terminal. A first resistor and a first capacitor are coupled in series between a first input terminal of the amplifier and the line, and a second resistor and a second capacitor are coupled in series between a second input terminal of the amplifier and the line. First and second precharge amplifiers are used to precharge the first and second capacitors, respectively, to reduce DC setup time.
摘要翻译：电路向线路调制器的输入端提供调制信号，线路调制器将根据调制信号调制的线路电流放置在电话线路上。电路的放大器放大模拟输入信号以在输出端提供调制信号。第一电阻器和第一电容器串联连接在放大器的第一输入端和线路之间，第二电阻器和第二电容器串联耦合在放大器的第二输入端子和线路之间。第一和第二预充电放大器分别用于对第一和第二电容器进行预充电，以减少直流建立时间。

7. 发明授权

US07706487B2 Method for training a transceiver for high speed communications 有权
标题翻译：用于训练用于高速通信的收发器的方法
公开(公告)号：US07706487B2
公开(公告)日：2010-04-27
申请号：US10964056
申请日：2004-10-12
申请人： Pervez Mirza Aziz , Donald Raymond Laturell , Mohammad Shafiul Mobin , Gregory W. Sheets , Lane A. Smith
发明人： Pervez Mirza Aziz , Donald Raymond Laturell , Mohammad Shafiul Mobin , Gregory W. Sheets , Lane A. Smith
IPC分类号： H04B1/10
CPC分类号： G01R31/31715 , H04B3/04 , H04L25/03038 , H04L2025/03356 , H04L2025/03477 , H04L2025/03617
摘要： In training a SERDES, a Common Electrical Interface (CEI) training frame, having certain bits of information embedded therein, is transmitted over a path which comprises transmitter, channel, and receiver components. The present invention analyzes the resulting received signal and determines the effective aggregate channel impulse response of these three components. The invention then determines an estimate of the inverse of this aggregate channel and uses this determination to reduce distortions that have been introduced into a signal that has been transmitted over the path.
摘要翻译：在训练SERDES时，通过包含发射机，信道和接收机组件的路径发送具有嵌入其中的某些信息位的公共电接口（CEI）训练帧。本发明分析所得到的接收信号并确定这三个分量的有效总信道脉冲响应。然后，本发明确定该聚合信道的逆的估计，并且使用该确定来减少已经被引入到已经通过该路径传输的信号中的失真。

8. 发明申请

US20090028320A1 INDUCTIVE COUPLING FOR COMMUNICATIONS EQUIPMENT INTERFACE CIRCUITRY 有权
标题翻译：用于通信设备接口电路的感应耦合
公开(公告)号：US20090028320A1
公开(公告)日：2009-01-29
申请号：US12187456
申请日：2008-08-07
申请人： Timothy W. Fuehrer , Donald Raymond Laturell , Lane A. Smith , Christopher J. Wittensoldner
发明人： Timothy W. Fuehrer , Donald Raymond Laturell , Lane A. Smith , Christopher J. Wittensoldner
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。

9. 发明授权

US06404780B1 Synchronizing data transfer protocol across high voltage interface 有权
标题翻译：跨高压接口同步数据传输协议
公开(公告)号：US06404780B1
公开(公告)日：2002-06-11
申请号：US09219775
申请日：1998-12-23
申请人： Donald Raymond Laturell , Lane A. Smith , Tony S. El-kik
发明人： Donald Raymond Laturell , Lane A. Smith , Tony S. El-kik
IPC分类号： H04J306
CPC分类号： H04J3/0608 , H04B14/04
摘要： The present invention provides a synchronizing data protocol comprising one or more serial input-output (SIO) control word(s) and data passed across a high voltage interface, to allow the elimination of a frame synchronization signal (and corresponding AC coupling capacitors). The present invention has particular applicability to, e.g., time division multiplexed (TDM) data, serial data communication devices, or synchronous serial communication interfaces in general, and to the communication between a controller and a codec in an audio codec device in accordance with the AC '97 Specification, i.e., the AC Link. The synchronizing data protocol is implemented over a transmit data signal line to provide occasional synchronization (i.e., not frame-by-frame synchronization) between the two communicating devices. The master device includes a preamble insertion module to insert a predetermined preamble code word into the transmitted data stream. An interrupt is sent to the slave device by withholding the data clock signal for a predetermined amount of time. Upon receipt of the interrupt, the slave device monitors the data stream for the presence of the preamble code word. Upon detection of the preamble code word, data transmitted by the codec is again enabled.
摘要翻译：本发明提供一种同步数据协议，其包括一个或多个串行输入输出（SIO）控制字和跨越高电压接口的数据，以允许消除帧同步信号（和相应的AC耦合电容）。本发明对于一般的时分多路复用（TDM）数据，串行数据通信设备或同步串行通信接口以及音频编解码器设备中的控制器与编解码器之间的通信具有特别的适用性， AC '97规格，即AC Link。通过发送数据信号线实现同步数据协议，以在两个通信设备之间提供偶尔的同步（即，不是逐帧同步）。主设备包括前导码插入模块，用于将预定的前导码字插入到发送的数据流中。通过在数据时钟信号中保持预定的时间量将中断发送到从设备。在接收到中断时，从设备监视数据流以存在前导码字。在检测到前导码字时，再次启用由编解码器发送的数据。

10. 发明授权

US07095848B1 Power up reset circuit for line powered circuit 有权
标题翻译：线路供电电路的上电复位电路
公开(公告)号：US07095848B1
公开(公告)日：2006-08-22
申请号：US09366614
申请日：1999-08-03
申请人： Jonathan Herman Fischer , Lane A. Smith , Michael G. Williams
发明人： Jonathan Herman Fischer , Lane A. Smith , Michael G. Williams
IPC分类号： H04M1/00 , H04M9/00 , H04M9/08
CPC分类号： H04M3/305 , H04M1/745
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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