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。

公开(公告)号：US06459306B1

公开(公告)日：2002-10-01

申请号：US09358558

申请日：1999-07-22

申请人： Jonathan Herman Fischer ,  Weilin Zhu

发明人： Jonathan Herman Fischer ,  Weilin Zhu

IPC分类号： H03K522

CPC分类号： H03K3/02337 ,  H03K3/3565

摘要： A low power differential comparator wherein the input stage bias is used not only to set a bias level but is also used to set the hysteresis level of the differential comparator circuit. The positive and/or negative inputs to the differential comparator circuit are referred to ground to reduce the total DC current draw, e.g., by a factor of 7. The multiple use of the input stage bias and grounded connections to the positive and/or negative inputs reduce the overall current requirements of the differential comparator circuit substantially while maintaining full operating speed as compared to conventional differential comparator circuits. In one embodiment using the low power differential comparator circuit, a clock receiver implements hysteresis which is relatively independent from variations in environmental factors such as temperature, and from power supply variations. In this embodiment, the input stage of a low power comparator circuit is biased by the output of a bias circuit. The bias circuit, which in the disclosed embodiment is a regulated current source, may be started-up with the output of a start-up circuit if desired. In operation, when the temperature increases the bias current decreases, but the values of hysteresis resistors in the low voltage comparator also increase. Therefore, the resultant hysteresis value does not change appreciably.

摘要翻译： 低功率差分比较器，其中输入级偏置不仅用于设置偏置电平，而且还用于设置差分比较器电路的滞后电平。 差分比较器电路的正和/或负输入被称为接地，以减少总直流电流汲取，例如为7倍。输入级偏置和接地连接到正和/或负的多次使用 与传统的差分比较器电路相比，输入基本上保持了全部工作速度，从而降低差分比较器电路的总体电流要求。 在使用低功率差分比较器电路的一个实施例中，时钟接收机实现滞后，其相对独立于环境因素（例如温度）和电源变化的变化。 在本实施例中，低功率比较器电路的输入级由偏置电路的输出偏置。 在所公开的实施例中的偏置电路是调节电流源，如果需要，可以利用启动电路的输出启动。 在运行中，当温度升高时，偏置电流减小，但低电压比较器中的迟滞电阻值也会增加。 因此，所得到的滞后值不会明显变化。

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。

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。

公开(公告)号：US06674857B1

公开(公告)日：2004-01-06

申请号：US09414568

申请日：1999-10-08

申请人： Jonathan H. Fischer ,  Donald R. Laturell ,  Lane A. Smith ,  Michael S. Toth ,  Keith E. Hollenbach ,  Weilin Zhu

发明人： Jonathan H. Fischer ,  Donald R. Laturell ,  Lane A. Smith ,  Michael S. Toth ,  Keith E. Hollenbach ,  Weilin Zhu

IPC分类号： H04M100

CPC分类号： H04M19/005 ,  Y02D70/1222

摘要： A line powered data access arrangement (DAA) is disclosed which adaptively allows proper operation with power supplied from a telephone line as conditions warrant, while at the same time satisfying the relevant requirements of many countries. In the line powered codec, a startup procedure for the international line powered codec uses register settings, e.g., country-specific register settings, which are powered and maintained from the low voltage side (e.g., from the PC or modem side) of the line powered codec. In this way, even during low line power conditions the programmed state of the line powered codec can be maintained, thus a default condition will not necessarily returned to by the line powered codec upon reset due to a power loss in the telephone line. In another aspect, a charge storage device such as a charge capacitor is charged from a charge pump formed from a differential clock signal from the low voltage side. A current and voltage detection module in the line powered codec is always powered from the telephone line. Upon detection of an off-hook signal or a power down condition, the current detection module determines if/when the current and voltage on the telephone line is sufficient to power certain circuits on the line powered codec. If sufficient power is not present, the line powered codec does not power up. However, the line powered codec will power up if sufficient current is detected. In another aspect, a plurality of power rails may be provided. A first power rail may be associated with the line power, a second power rail may be associated with a low voltage side power source, e.g., a charge storage device. A third (and other) power rails may be switchably connected to either the first power rail or second power rail as line power conditions and on-hook/off-hook conditions warrant.

摘要翻译： 公开了一种线路数据访问安排（DAA），其适应性地允许根据条件允许从电话线路提供的电力进行适当的操作，同时满足许多国家的相关要求。 在线路供电的编解码器中，用于国际线路供电的编解码器的启动过程使用寄存器设置，例如，国家特定寄存器设置，其由线路的低电压侧（例如，从PC或调制解调器侧）供电和维护 电源编解码器。 以这种方式，即使在低功率电力条件下，也可以维护线路供电的编解码器的编程状态，因此由于电话线路中的功率损耗，默认条件不一定由线路供电的编解码器复位。 另一方面，诸如充电电容器的电荷存储装置从由低电压侧的差分时钟信号形成的电荷泵充电。 线路供电编解码器中的电流和电压检测模块始终通过电话线供电。 当检测到摘机信号或断电状态时，电流检测模块确定电话线路上的电流和电压是否足以对线路供电的编解码器上的某些电路供电。 如果没有足够的电源，线路供电的编解码器不会上电。 然而，如果检测到足够的电流，则线路供电的编解码器将上电。 另一方面，可以设置多个电源轨。 第一电力轨可以与线路电力相关联，第二电力轨道可以与低电压侧电源（例如电荷存储装置）相关联。 第三（和其他）电源轨可以切换地连接到第一个电源轨或第二个电源轨，因为线路电源条件和挂机/摘机条件值得。

公开(公告)号：US06252437B1

公开(公告)日：2001-06-26

申请号：US09413960

申请日：1999-10-07

申请人： Jonathan H. Fischer ,  Weilin Zhu

发明人： Jonathan H. Fischer ,  Weilin Zhu

IPC分类号： H03K513

CPC分类号： H03K5/2481

摘要： A circuit and method for reducing a propagation delay associated with a comparator and a comparator employing the circuit or method. In one embodiment, the comparator, includes: (1) an input stage that receives a differential input signal and develops therefrom a threshold signal, (2) an output stage, coupled to the input stage, that develops a level shifted single-ended output signal as a function of the threshold signal, and (3) a speed-up circuit, associated with the input stage, that reduces a time period to develop the determinant signal thereby decreasing a propagation delay in developing the level shifted single-ended output signal from the differential input signal.

摘要翻译： 一种用于减小与比较器相关联的传播延迟的电路和方法，以及采用该电路或方法的比较器。 在一个实施例中，比较器包括：（1）输入级，其接收差分输入信号并从其产生阈值信号;（2）耦合到输入级的输出级，产生电平移位的单端输出 信号作为阈值信号的函数，以及（3）与输入级相关联的加速电路，其减少了形成行列式信号的时间周期，从而降低了开发电平移位的单端输出信号中的传播延迟 从差分输入信号。

公开(公告)号：US06735305B1

公开(公告)日：2004-05-11

申请号：US09414566

申请日：1999-10-04

申请人： Jonathan H. Fischer ,  Donald R. Laturell ,  Lane A. Smith ,  Michael S. Toth ,  Michael G. Williams ,  Keith Eugene Hollenbach ,  Weilin Zhu

发明人： Jonathan H. Fischer ,  Donald R. Laturell ,  Lane A. Smith ,  Michael S. Toth ,  Michael G. Williams ,  Keith Eugene Hollenbach ,  Weilin Zhu

IPC分类号： H04M100

CPC分类号： H04M1/738 ,  H04M19/02

摘要： A line powered data access arrangement (DAA) is disclosed which adaptively allows proper operation with power supplied from a telephone line as conditions warrant, while at the same time satisfying the relevant requirements of many countries. In the line powered codec, a startup procedure for the international line powered codec uses register settings, e.g., country-specific register settings, which are powered and maintained from the low voltage side (e.g., from the PC or modem side) of the line powered codec. In this way, even during low line power conditions the programmed state of the line powered codec can be maintained, thus a default condition will not necessarily returned to by the line powered codec upon reset due to a power loss in the telephone line. In another aspect, a charge storage device such as a charge capacitor is charged from a charge pump formed from a differential clock signal from the low voltage side. A current and voltage detection module in the line powered codec is always powered from the telephone line. Upon detection of an off-hook signal or a power down condition, the current detection module determines if/when the current and voltage on the telephone line is sufficient to power certain circuits on the line powered codec. If sufficient power is not present, the line powered codec does not power up. However, the line powered codec will power up if sufficient current is detected. In another aspect, a plurality of power rails may be provided. A first power rail may be associated with the line power, a second power rail may be associated with a low voltage side power source, e.g., a charge storage device. A third (and other) power rails may be switchably connected to either the first power rail or second power rail as line power conditions and on-hook/off-hook conditions warrant.

摘要翻译： 公开了一种线路数据访问安排（DAA），其适应性地允许根据条件允许从电话线路提供的电力进行适当的操作，同时满足许多国家的相关要求。 在线路供电的编解码器中，用于国际线路供电的编解码器的启动过程使用寄存器设置，例如，国家特定寄存器设置，其由线路的低电压侧（例如，从PC或调制解调器侧）供电和维护 电源编解码器。 以这种方式，即使在低功率电力条件下，也可以维护线路供电的编解码器的编程状态，因此由于电话线路中的功率损耗，默认条件不一定由线路供电的编解码器复位。 另一方面，诸如充电电容器的电荷存储装置从由低电压侧的差分时钟信号形成的电荷泵充电。 线路供电编解码器中的电流和电压检测模块始终通过电话线供电。 当检测到摘机信号或断电状态时，电流检测模块确定电话线路上的电流和电压是否足以对线路供电的编解码器上的某些电路供电。 如果没有足够的电源，线路供电的编解码器不会上电。 然而，如果检测到足够的电流，则线路供电的编解码器将上电。 另一方面，可以设置多个电源轨。 第一电力轨可以与线路电力相关联，第二电力轨道可以与低电压侧电源（例如电荷存储装置）相关联。 第三（和其他）电源轨可以切换地连接到第一个电源轨或第二个电源轨，因为线路电源条件和挂机/摘机条件值得。

公开(公告)号：US09914167B2

公开(公告)日：2018-03-13

申请号：US14236609

申请日：2012-03-14

申请人： Xuyi Shan ,  Suoquan Zhang ,  Li Huang ,  Hongru Ding ,  Ziqiang Wang ,  Weilin Zhu ,  Quansheng Wang

发明人： Xuyi Shan ,  Suoquan Zhang ,  Li Huang ,  Hongru Ding ,  Ziqiang Wang ,  Weilin Zhu ,  Quansheng Wang

IPC分类号： B22D11/126 ,  B22D11/16 ,  B21B1/46 ,  B21B15/00

CPC分类号： B22D11/126 ,  B21B1/466 ,  B21B2015/0014 ,  B22D11/163 ,  Y10T83/04

摘要： A method of pre-controlling the shapes of a continuous-casting slab head and tail for reducing the cut amount of the head and tail of the hot rolling intermediate slab. The continuous-casting slab head and tail, is cut into a shape such that an end surface of the head concaves inwards and the tail projects outwards. The head and tail of a slab is cut in a curve that is symmetric to the center line in width thereof. Arc height, i.e. a maximum value of the concave amount at the head or that of the projection amount at the tail, is controlled within 0 mm-50 mm.

公开(公告)号：US20140352504A1

公开(公告)日：2014-12-04

申请号：US14236609

申请日：2012-03-14

申请人： Xuyi Shan ,  Suoquan Zhang ,  Li Huang ,  Hongru Ding ,  Ziqiang Wang ,  Weilin Zhu ,  Quansheng Wang

发明人： Xuyi Shan ,  Suoquan Zhang ,  Li Huang ,  Hongru Ding ,  Ziqiang Wang ,  Weilin Zhu ,  Quansheng Wang

IPC分类号： B22D11/126

CPC分类号： B22D11/126 ,  B21B1/466 ,  B21B2015/0014 ,  B22D11/163 ,  Y10T83/04

摘要： A method of pre-controlling the shapes of a continuous-casting slab head and tail for reducing the cut amount of the head and tail of the hot rolling intermediate slab. The continuous-casting slab head and tail, is cut into a shape such that an end surface of the head concaves inwards and the tail projects outwards. The head and tail of a slab is cut in a curve that is symmetric to the center line in width thereof. Arc height, i.e. a maximum value of the concave amount at the head or that of the projection amount at the tail is controlled within 0 mm-50 mm.

摘要翻译： 一种预先控制连续铸造板坯头部和尾部的形状以减少热轧中间板坯的头部和尾部的切割量的方法。 连续铸造的板坯头部和尾部被切割成使得头部的端面向内凹入的形状，并且尾部向外突出。 将板坯的头部和尾部以与其宽度方向的中心线对称的曲线切割。 电弧高度，即头部处的凹入量的最大值或尾部的突出量的最大值被控制在0mm-50mm内。