公开(公告)号：US20110068831A1

公开(公告)日：2011-03-24

申请号：US12565339

申请日：2009-09-23

申请人： Hsin-Hsien LI ,  Chin-Chun LIN ,  Tsung-Hsien HSIEH ,  Zi-Long HUANG

发明人： Hsin-Hsien LI ,  Chin-Chun LIN ,  Tsung-Hsien HSIEH ,  Zi-Long HUANG

IPC分类号： H03K3/00

CPC分类号： H04L25/028 ,  H04L25/0282

摘要： A line driver for a communications system requiring multiple power sources for different modes of operation comprises a current source and a voltage source coupled in parallel with the current source. The current source has a first terminal and a second terminal. The line driver further comprises a first source resistor coupled to the first terminal of the current source and a second source resistor coupled to the second terminal of the current source. The current source provides a driving current and the voltage source provides a driving voltage at the same time during operations of the communications system.

摘要翻译： 用于需要用于不同操作模式的多个电源的通信系统的线路驱动器包括与电流源并联耦合的电流源和电压源。 电流源具有第一端子和第二端子。 线路驱动器还包括耦合到电流源的第一端子的第一源电阻器和耦合到电流源的第二端子的第二源极电阻器。 电流源提供驱动电流，并且电压源在通信系统的操作期间同时提供驱动电压。

公开(公告)号：US20110163807A1

公开(公告)日：2011-07-07

申请号：US12683386

申请日：2010-01-06

申请人： Hsin-Hsien LI ,  Chin-Chun LIN ,  Tsung-Hsien HSIEH ,  Zi-Long HUANG

发明人： Hsin-Hsien LI ,  Chin-Chun LIN ,  Tsung-Hsien HSIEH ,  Zi-Long HUANG

IPC分类号： H03F3/45

CPC分类号： H03F1/56 ,  H03F3/45475 ,  H03F2200/387 ,  H03F2203/45048 ,  H03F2203/45138

摘要： A circuit comprises an amplifier circuit and a trimming circuit. The amplifier circuit includes an operational amplifier. The operational amplifier has a first input configured to receive input signals, and the operational amplifier also has a second input and an amplifier output. One of the first input or the second input is a negative input. The trimming circuit is coupled to the amplifier output. The trimming circuit includes a termination resistor coupled in parallel with at least one trimming resistor. The termination resistor is coupled to a first switch in series, and the trimming resistor is coupled to a second switch in series. The amplifier output is connected back to the negative input through the first switch.

摘要翻译： 电路包括放大器电路和微调电路。 放大器电路包括运算放大器。 运算放大器具有被配置为接收输入信号的第一输入，并且运算放大器还具有第二输入和放大器输出。 第一个输入或第二个输入之一是负输入。 微调电路耦合到放大器输出端。 修整电路包括与至少一个微调电阻器并联耦合的终端电阻器。 终端电阻器串联耦合到第一开关，并且微调电阻器串联耦合到第二开关。 放大器输出端通过第一个开关连接到负输入端。