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33 条记录 (耗时 0.026 秒)

    Low noise amplifier with current bleeding branch
    13.
    发明授权
    Low noise amplifier with current bleeding branch 有权
    低噪声放大器，带电流分支

    公开(公告)号：US08258869B2

    公开(公告)日：2012-09-04

    申请号：US12894144

    申请日：2010-09-30

    申请人： Zhongwu Zhao ,  Xiaodong Jin

    发明人： Zhongwu Zhao ,  Xiaodong Jin

    IPC分类号： H03F3/45

    CPC分类号： H03F3/45201 ,  H03F1/223 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2203/45336 ,  H03F2203/45491 ,  H03F2203/45494 ,  H03F2203/45696 ,  H03F2203/45726 ,  H03G1/0029

    摘要： An LNA circuit for providing a wide range of gain while maintaining the output headroom. In a radio frequency (RF) receiver, the signal received by the receiver may be extremely small. For a transmitter in a short distance, the received signal may be relatively strong. A low power amplifier usually is used to amplify the input signal. The LNA has to be designed to accommodate a wide range of gain. A convention LNA circuit supporting a wide range of gain often suffers from reduced output headroom due to increased current through the load resistor. The present invention discloses the use of current bleeding branch to allow a portion of current to flow through the current bleeding branch and consequently reduces the current that would have flown through the load resistor. Consequently, the voltage across the load resistor may be maintained low to allow adequate output headroom.

    摘要翻译： LNA电路，用于提供宽范围的增益，同时保持输出净空。 在射频（RF）接收机中，由接收机接收的信号可能非常小。 对于短距离的发射机，接收的信号可能相对较强。 低功率放大器通常用于放大输入信号。 LNA必须设计成适应广泛的收益。 支持宽范围增益的常规LNA电路通常由于通过负载电阻的电流增加而导致输出净空减少。 本发明公开了使用流出血分支以允许电流的一部分流过电流出血支路，从而减少了将流过负载电阻器的电流。 因此，可以将负载电阻器两端的电压维持在低电平以允许足够的输出净空。

    Method and apparatus for an LNA with high linearity and improved gain control
    14.
    发明授权
    Method and apparatus for an LNA with high linearity and improved gain control 有权
    具有高线性度和改进的增益控制的LNA的方法和装置

    公开(公告)号：US08031006B1

    公开(公告)日：2011-10-04

    申请号：US12567855

    申请日：2009-09-28

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

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

    IPC分类号： H03F3/04

    CPC分类号： H03G1/0029 ,  H03G1/007 ,  H03G2201/103

    摘要： A low noise amplifier includes an input stage. The input stage includes a first device configured to receive an input signal. A second device is connected to the first device. The second device has a predetermined input impedance. The input stage is configured so that a change in the input signal to the first device causes a linearly proportional change in a conductance of the first device. A voltage at a junction between the first device and the second device remains substantially constant due to the predetermined input impedance of the second device.

    摘要翻译： 低噪声放大器包括输入级。 输入级包括被配置为接收输入信号的第一设备。 第二设备连接到第一设备。 第二装置具有预定的输入阻抗。 输入级被配置为使得到第一器件的输入信号的变化导致第一器件的电导的线性比例变化。 由于第二装置的预定输入阻抗，第一装置和第二装置之间的连接处的电压保持基本恒定。

    Active bias circuit for low-noise amplifiers
    17.
    发明授权
    Active bias circuit for low-noise amplifiers 有权
    低噪声放大器的主动偏置电路

    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。

    TRANSCEIVER SYSTEM INCLUDING DUAL LOW-NOISE AMPLIFIERS BACKGROUND
    19.
    发明申请
    TRANSCEIVER SYSTEM INCLUDING DUAL LOW-NOISE AMPLIFIERS BACKGROUND 有权
    包括双低噪声放大器的收发器系统背景技术

    公开(公告)号：US20110003562A1

    公开(公告)日：2011-01-06

    申请号：US12881226

    申请日：2010-09-14

    申请人： Xiaodong Jin ,  Sehat Sutardja ,  Lawrence Tse

    发明人： Xiaodong Jin ,  Sehat Sutardja ,  Lawrence Tse

    IPC分类号： H04B1/38

    CPC分类号： H04B1/0064 ,  H04B7/0805

    摘要： A transceiver system includes a first receive path with a first antenna configured to receive first signals, a first configuration switch, a first low noise amplifier configured to amplify the first signals, a second configuration switch, and a receiver. The first receive path is selectively configured to supply the amplified first signals to the receiver via the first antenna, the first configuration switch, the first low noise amplifier, and the second configuration switch. A second receive path includes a second antenna configured to receive second signals, a second low noise amplifier configured to amplify the second signals, the second configuration switch, and the receiver. The second receive path (i) includes fewer configuration switches than the first receive path and (ii) is selectively configured to supply the amplified second signals to the receiver via the second antenna, the second low noise amplifier, and the second configuration switch.

    摘要翻译： 收发机系统包括具有被配置为接收第一信号的第一天线的第一接收路径，第一配置开关，被配置为放大第一信号的第一低噪声放大器，第二配置开关和接收器。 第一接收路径被选择性地配置为经由第一天线，第一配置开关，第一低噪声放大器和第二配置开关将放大的第一信号提供给接收器。 第二接收路径包括被配置为接收第二信号的第二天线，配置成放大第二信号的第二低噪声放大器，第二配置开关和接收器。 第二接收路径（i）包括比第一接收路径更少的配置开关，以及（ii）被选择性地配置为经由第二天线，第二低噪声放大器和第二配置开关将经放大的第二信号提供给接收机。