公开(公告)号：US08743939B2

公开(公告)日：2014-06-03

申请号：US12215222

申请日：2008-06-26

申请人： Xiaopeng Chen ,  Runsheng He ,  Shuran Wei

发明人： Xiaopeng Chen ,  Runsheng He ,  Shuran Wei

IPC分类号： H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC分类号： H04B3/32 ,  H04B3/231

摘要： A nonlinear echo compensator comprises a mapping circuit that includes a weighting circuit that generates a weighted signal based on a current symbol and a prior symbol and a function generating circuit that selects one of N functions based on the weighted signal, where N is an integer greater than one. The mapping circuit generates a driving signal based on the selected one of the N functions and the weighted signal. A canceling circuit generates a nonlinear echo compensation signal based on the driving signal.

摘要翻译： 非线性回波补偿器包括映射电路，该映射电路包括基于当前符号和先前符号产生加权信号的加权电路，以及基于加权信号选择N个函数之一的函数产生电路，其中N是更大的整数 比一个。 映射电路根据N个功能和加权信号中选择的一个产生驱动信号。 消除电路基于驱动信号产生非线性回波补偿信号。

公开(公告)号：US07113043B1

公开(公告)日：2006-09-26

申请号：US10868064

申请日：2004-06-16

申请人： Xiaodong Jin ,  Shuran Wei

发明人： Xiaodong Jin ,  Shuran Wei

IPC分类号： H03G3/10

CPC分类号： H03F1/26 ,  H03F1/30 ,  H03F3/343 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2200/504

摘要： A low-noise amplifier includes a first amplification device. The first amplification device includes a control terminal, a first terminal, and a second terminal. The low-noise amplifier also includes a feedback circuit in communication with the control terminal and the first terminal. The feedback circuit compares a voltage, corresponding to an output current associated with the first terminal, with a predetermined reference voltage to generate a bias signal applied to the control terminal for biasing the low-noise amplifier.

摘要翻译： 低噪声放大器包括第一放大装置。 第一放大装置包括控制端子，第一端子和第二端子。 低噪声放大器还包括与控制终端和第一终端通信的反馈电路。 反馈电路将对应于与第一端子相关联的输出电流的电压与预定参考电压进行比较，以产生施加到控制端子以偏置低噪声放大器的偏置信号。

公开(公告)号：US5751161A

公开(公告)日：1998-05-12

申请号：US626272

申请日：1996-04-04

申请人： Shuran Wei ,  Randall Bach

发明人： Shuran Wei ,  Randall Bach

IPC分类号： H03K19/00 ,  H04L25/02 ,  H03K17/16

CPC分类号： H04L25/0278 ,  H03K19/0005 ,  H04L25/028

摘要： A method and circuit are disclosed for changing the output impedance of an impedance controlled buffer from an initial impedance to a final impedance, while minimizing data transmission errors. The buffer has a plurality of impedance control inputs, with each of the plurality of impedance control inputs receiving a corresponding one of a plurality of bits of a binary coded impedance control signal. The output impedance of the buffer is controlled as a function of a value of the impedance control signal. First, the value of the impedance control signal is changed from an initial value corresponding to the initial output impedance to an intermediate value corresponding to an intermediate output impedance which is less than the initial output impedance. Next, the intermediate value of the impedance control signal is changed to a final value corresponding to the final output impedance.

摘要翻译： 公开了一种方法和电路，用于将阻抗控制缓冲器的输出阻抗从初始阻抗改变为最终阻抗，同时最小化数据传输误差。 缓冲器具有多个阻抗控制输入，多个阻抗控制输入中的每一个接收二进制编码阻抗控制信号的多个比特中的对应的一个。 作为阻抗控制信号的值，缓冲器的输出阻抗被控制。 首先，将阻抗控制信号的值从对应于初始输出阻抗的初始值改变为对应于小于初始输出阻抗的中间输出阻抗的中间值。 接下来，将阻抗控制信号的中间值改变为对应于最终输出阻抗的最终值。

公开(公告)号：US07409057B1

公开(公告)日：2008-08-05

申请号：US10189321

申请日：2002-07-03

申请人： Xiaopeng Chen ,  Runsheng He ,  Shuran Wei

发明人： Xiaopeng Chen ,  Runsheng He ,  Shuran Wei

IPC分类号： H04M9/08

CPC分类号： H04B3/32 ,  H04B3/231

摘要： A nonlinear echo compensator compensates for nonlinear echo in a transceiver including a transmitter line driver with current cells that are operated in a Class B operating mode. A mapping circuit generates a pattern dependent driving signal. A coefficient generator generates a compensator coefficient. A canceling circuit communicates with the mapping circuit and the coefficient generator and compensates for nonlinear echo in a received signal based on the pattern dependent driving signal and the compensator coefficient.

摘要翻译： 非线性回波补偿器补偿收发器中的非线性回波，包括具有在B类操作模式下操作的当前单元的发射机线路驱动器。 映射电路产生与图形相关的驱动信号。 系数发生器产生补偿系数。 取消电路与映射电路和系数发生器通信，并且基于模式相关的驱动信号和补偿器系数来补偿接收信号中的非线性回波。

公开(公告)号：US07262665B1

公开(公告)日：2007-08-28

申请号：US11523423

申请日：2006-09-19

申请人： Xiaodong Jin ,  Shuran Wei

发明人： Xiaodong Jin ,  Shuran Wei

IPC分类号： H03G3/10

CPC分类号： H03F1/26 ,  H03F1/30 ,  H03F3/343 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2200/504

摘要： A low-noise amplifier with a first amplification circuit that includes a control terminal, a first terminal, and a second terminal that communicates with a first reference voltage. An impedance load that communicates with the first terminal and a feedback circuit that comprises a current source that communicates with a second reference voltage. A comparator circuit that includes a first input, a second input and an output that communicates with the control terminal. A first impedance that communicates with the current source and the first input and that generates a predetermined reference voltage based on a reference current generated by the current source and a second impedance that communicates with the second input and the impedance load wherein the feedback circuit compares a voltage, based on an output current associated with the first terminal, with the reference voltage to generate a bias signal that is applied to the control terminal.

摘要翻译： 一种具有第一放大电路的低噪声放大器，包括控制端子，第一端子和与第一参考电压连通的第二端子。 与第一端子通信的阻抗负载和包括与第二参考电压通信的电流源的反馈电路。 比较器电路，其包括与控制端子通信的第一输入端，第二输入端和输出端。 第一阻抗，其与电流源和第一输入端通信，并且基于由电流源产生的参考电流产生预定参考电压，以及与第二输入和阻抗负载通信的第二阻抗，其中反馈电路将 基于与第一端子相关联的输出电流的电压与参考电压产生施加到控制端子的偏置信号。

公开(公告)号：US07009308B1

公开(公告)日：2006-03-07

申请号：US11034979

申请日：2005-01-13

申请人： Xiaodong Jin ,  Lawrence Tse ,  King Chun Tsai ,  George Chien ,  Shuran Wei

发明人： Xiaodong Jin ,  Lawrence Tse ,  King Chun Tsai ,  George Chien ,  Shuran Wei

IPC分类号： H01L23/49

CPC分类号： H01L24/49 ,  H01L23/60 ,  H01L23/66 ,  H01L24/06 ,  H01L24/48 ,  H01L2223/6611 ,  H01L2224/05553 ,  H01L2224/05554 ,  H01L2224/05599 ,  H01L2224/45015 ,  H01L2224/4809 ,  H01L2224/48091 ,  H01L2224/484 ,  H01L2224/49113 ,  H01L2224/85399 ,  H01L2924/00014 ,  H01L2924/01014 ,  H01L2924/01033 ,  H01L2924/14 ,  H01L2924/19041 ,  H01L2924/19042 ,  H01L2924/19043 ,  H01L2924/20752 ,  H01L2924/30105 ,  H01L2924/30107 ,  H01L2924/3011 ,  H01L2924/30111 ,  H01L2224/45099 ,  H01L2924/00

摘要： A circuit that eliminates an off-chip inductive component connected between an integrated circuit (IC) arranged on a package and an external load comprises a package and an IC that is arranged on the package. A first bondwire arranged on the package has one end that communicates with the external load and an opposite end that communicates with the IC. A second bondwire located on the package has one end that communicates with the external load and an opposite end that communicates with the IC.

摘要翻译： 消除连接在布置在封装上的集成电路（IC）和外部负载之间的片外感应元件的电路包括布置在封装上的封装和IC。 布置在封装上的第一接合线具有与外部负载连通的一端和与IC连通的相对端。 位于封装上的第二接合线具有与外部负载连通的一端和与IC连通的相对端。

公开(公告)号：US07855604B1

公开(公告)日：2010-12-21

申请号：US12351040

申请日：2009-01-09

申请人： Shuran Wei ,  Lawrence Tse ,  Sehat Sutardja

发明人： Shuran Wei ,  Lawrence Tse ,  Sehat Sutardja

IPC分类号： H03F1/52

CPC分类号： H03F1/52 ,  H03F1/523 ,  H03F3/45183 ,  H03F3/72 ,  H03F2200/372 ,  H03F2200/471 ,  H03F2200/78 ,  H03F2203/45544 ,  H03F2203/45622 ,  H03F2203/45638

摘要： A transmitter system includes a transmitter with a power amplifier. An antenna communicates with the power amplifier. A protection circuit generates a sensed signal that varies with an impedance of the antenna and reduces an output of the power amplifier in response to the sensed signal exceeding a predetermined threshold.

摘要翻译： 发射机系统包括具有功率放大器的发射机。 天线与功率放大器通信。 保护电路产生随着天线的阻抗而变化的感测信号，并且响应于超过预定阈值的感测信号而减小功率放大器的输出。

公开(公告)号：US06977444B1

公开(公告)日：2005-12-20

申请号：US11034093

申请日：2005-01-12

申请人： Xiaodong Jin ,  Lawrence Tse ,  King Chun Tsai ,  George Chien ,  Shuran Wei

发明人： Xiaodong Jin ,  Lawrence Tse ,  King Chun Tsai ,  George Chien ,  Shuran Wei

IPC分类号： H01L23/48 ,  H01L23/49 ,  H01L23/60 ,  H01L23/66

CPC分类号： H01L24/49 ,  H01L23/60 ,  H01L23/66 ,  H01L24/06 ,  H01L24/48 ,  H01L2223/6611 ,  H01L2224/05553 ,  H01L2224/05554 ,  H01L2224/05599 ,  H01L2224/45015 ,  H01L2224/4809 ,  H01L2224/48091 ,  H01L2224/484 ,  H01L2224/49113 ,  H01L2224/85399 ,  H01L2924/00014 ,  H01L2924/01014 ,  H01L2924/01033 ,  H01L2924/14 ,  H01L2924/19041 ,  H01L2924/19042 ,  H01L2924/19043 ,  H01L2924/20752 ,  H01L2924/30105 ,  H01L2924/30107 ,  H01L2924/3011 ,  H01L2924/30111 ,  H01L2224/45099 ,  H01L2924/00

摘要： An input circuit for an integrated circuit (IC), which is mounted on a package having an input pin, rejects signal energy at a first frequency. A first bondwire arranged on the package has one end that communicates with the pin and an opposite end that communicates with components of the IC. A second bondwire located on the package has one end that communicates with the pin and an opposite end that communicates with a capacitance. The capacitance and an inductance of the first and second bondwires resonate at the first frequency to reject signal energy at the first frequency. Bondwires are also used to eliminate external components such as resonant components and impedance matching circuits to reduce cost.

摘要翻译： 用于集成电路（IC）的输入电路，其安装在具有输入引脚的封装上，以第一频率拒绝信号能量。 布置在封装上的第一接合线具有与引脚连通的一端和与IC的部件连通的相对端。 位于封装上的第二接合线具有与销连通的一端和与电容连通的相对端。 第一和第二键合线的电容和电感以第一频率谐振以在第一频率处抑制信号能量。 Bondwires也用于消除诸如谐振元件和阻抗匹配电路的外部元件，以降低成本。

公开(公告)号：US06856200B1

公开(公告)日：2005-02-15

申请号：US10246870

申请日：2002-09-19

申请人： Shuran Wei ,  Lawrence Tse ,  Sehat Sutardja

发明人： Shuran Wei ,  Lawrence Tse ,  Sehat Sutardja

IPC分类号： H03C1/62 ,  H03F1/52 ,  H03F3/45 ,  H03F3/72

CPC分类号： H03F1/52 ,  H03F1/523 ,  H03F3/45183 ,  H03F3/72 ,  H03F2200/372 ,  H03F2200/471 ,  H03F2200/78 ,  H03F2203/45544 ,  H03F2203/45622 ,  H03F2203/45638

摘要： A protection circuit for a power amplifier of a radio frequency transmitter includes a sensing circuit that generates a sensed signal based on an output of the power amplifier. A reference signal generator generates a reference signal. A comparator communicates with the sensing circuit and the reference signal generator and outputs a first state when the reference signal exceeds the sensed signal and a second state when the sensed signal exceeds the reference signal. A turn off circuit turns off the power amplifier when the comparator is in the second state.

摘要翻译： 用于射频发射机的功率放大器的保护电路包括基于功率放大器的输出产生感测信号的感测电路。 参考信号发生器产生参考信号。 比较器与检测电路和参考信号发生器进行通信，当参考信号超过感测信号时，比较器输出第一状态，当感测信号超过参考信号时，比较器输出第二状态。 当比较器处于第二状态时，关断电路关闭功率放大器。

公开(公告)号：US06727736B1

公开(公告)日：2004-04-27

申请号：US10226549

申请日：2002-08-23

申请人： Randy Tsang ,  Shuran Wei

发明人： Randy Tsang ,  Shuran Wei

IPC分类号： H03L406

CPC分类号： H03L7/0891 ,  H03L7/093 ,  H03L7/099

摘要： A phase locked loop including a loop filter to generate a control voltage as a function of an input signal and a. reference voltage. A voltage controlled oscillator (VCO) coupled to the loop filter, includes a varactor having terminals. In response to the control voltage, the VCO generates a periodic output signal having a frequency that is a function of the varactor and the control voltage. The VCO duplicates noise appearing on one of the varactor terminals to another of the varactor terminals so that noise in the periodic output signal is reduced.

摘要翻译： 一种锁相环，包括一个环路滤波器，以产生一个作为输入信号的函数的控制电压， 参考电压。 耦合到环路滤波器的压控振荡器（VCO）包括具有端子的变容二极管。 响应于控制电压，VCO产生具有作为变容二极管和控制电压的函数的频率的周期性输出信号。 VCO将出现在其中一个变容二极管端子上的噪声复制到另一个变容二极管端子，使得周期性输出信号中的噪声减小。