知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

72 条记录 (耗时 0.024 秒)

    Two Differential Amplifier Configuration
    4.
    发明申请
    Two Differential Amplifier Configuration 有权
    两个差分放大器配置

    公开(公告)号：US20160079943A1

    公开(公告)日：2016-03-17

    申请号：US14569079

    申请日：2014-12-12

    申请人： ESS Technology, Inc.

    发明人： A. Martin Mallinson

    IPC分类号： H03F3/45 ,  H03F1/02

    CPC分类号： H03F3/45076 ,  H03F1/0205 ,  H03F1/34 ,  H03F3/45475 ,  H03F3/45941 ,  H03F3/4595 ,  H03F2200/09 ,  H03F2203/45114 ,  H03F2203/45116 ,  H03F2203/45138 ,  H03F2203/45224 ,  H03F2203/45336 ,  H03F2203/45416 ,  H03F2203/45446 ,  H03F2203/45521 ,  H03F2203/45528 ,  H03F2203/45594

    摘要： An apparatus is disclosed for providing a common mode voltage to the inputs of a first differential amplifier which outputs the difference between two signals. A second differential amplifier receives the output of the first differential amplifier, and the output of the second differential amplifier is fed back to the inputs of the first differential amplifier as a common mode voltage. Since both inputs of the first differential amplifier receive the fed hack common mode voltage, the first differential amplifier still outputs only the difference in the two signals, but the presence of the common mode voltage allows the first differential amplifier to operate with lower noise if the voltage levels of the inputs to the first differential amplifier vary. The second differential amplifier may be of significantly lower quality and cost than the first differential amplifier, without affecting the performance of the first differential amplifier.

    摘要翻译： 公开了一种用于向输出两个信号之间的差的第一差分放大器的输入端提供共模电压的装置。 第二差分放大器接收第一差分放大器的输出，第二差分放大器的输出作为共模电压被反馈到第一差分放大器的输入端。 由于第一差分放大器的两个输入都接收馈电的黑客共模电压，所以第一差分放大器仍然仅输出两个信号的差值，但是共模电压的存在允许第一差分放大器以较低的噪声运行，如果 第一差分放大器的输入的电压电平变化。 第二差分放大器的质量和成本可能比第一差分放大器低得多，而不影响第一差分放大器的性能。

    FIXED GAIN AMPLIFIER CIRCUIT
    5.
    发明申请
    FIXED GAIN AMPLIFIER CIRCUIT 有权
    固定增益放大器电路

    公开(公告)号：US20150357983A1

    公开(公告)日：2015-12-10

    申请号：US14296914

    申请日：2014-06-05

    申请人： STMICROELECTRONICS, INC.

    发明人： Davy Choi

    IPC分类号： H03G1/00 ,  H03F1/02 ,  H03F3/45

    CPC分类号： H03G3/02 ,  H03F1/0205 ,  H03F1/26 ,  H03F3/3022 ,  H03F3/393 ,  H03F3/45 ,  H03F3/45094 ,  H03F3/45179 ,  H03F3/45475 ,  H03F2200/261 ,  H03F2203/45116 ,  H03F2203/45138 ,  H03F2203/45336 ,  H03G1/0035 ,  H03G1/02 ,  H03G3/3036 ,  H03M1/18

    摘要： An instrumentation amplifier includes first and second resistors for gain setting. The operational amplifiers within the instrumentation amplifier include selectively enabled current drive sources coupled to the amplifier output. The first and second resistors have variable resistances. A control circuit is configured to select the variable resistances of the first and second resistors to implement a fixed gain for the instrumentation amplifier and further selectively enable the current drive sources. The control circuit receives an indication of a downstream programmable gain (for example, from a downstream programmable gain amplifier). The variable resistances of the first and second resistors are selected to be scaled inversely with respect to the downstream programmable gain and the current drive sources are enabled proportionately with respect to the downstream programmable gain.

    摘要翻译： 仪表放大器包括用于增益设定的第一和第二电阻器。 仪表放大器内的运算放大器包括耦合到放大器输出的有选择地使能的电流驱动源。 第一和第二电阻具有可变电阻。 控制电路被配置为选择第一和第二电阻器的可变电阻以实现仪器放大器的固定增益，并且进一步选择性地启用当前的驱动源。 控制电路接收下游可编程增益的指示（例如，从下游可编程增益放大器）。 第一和第二电阻器的可变电阻被选择为相对于下游可编程增益反相缩放，并且当前驱动源相对于下游可编程增益成比例地启用。

    AMPLIFIER CIRCUIT AND AMPLIFIER CIRCUIT IC CHIP
    6.
    发明申请
    AMPLIFIER CIRCUIT AND AMPLIFIER CIRCUIT IC CHIP 审中-公开
    放大器电路和放大器电路IC芯片

    公开(公告)号：US20150249434A1

    公开(公告)日：2015-09-03

    申请号：US14428480

    申请日：2014-06-17

    申请人： ASAHI KASEI MICRODEVICES CORPORATION

    发明人： Tomohiko Ogawa ,  Yoshihiko Koizumi

    IPC分类号： H03F1/56 ,  G01R27/02 ,  G01P15/12 ,  H03F3/45 ,  G01P3/44

    CPC分类号： H03F1/56 ,  G01P3/44 ,  G01P3/487 ,  G01P15/12 ,  G01P15/123 ,  G01R27/02 ,  H03F3/45071 ,  H03F3/45475 ,  H03F3/45932 ,  H03F2200/261 ,  H03F2200/294 ,  H03F2200/504 ,  H03F2200/555 ,  H03F2203/45138 ,  H03F2203/45336 ,  H03F2203/45528 ,  H03F2203/45591 ,  H03F2203/45592

    摘要： An amplifier circuit includes a converter configured to convert a predefined physical quantity to a resistance value, and the resistance value converted by the converter is converted to a voltage value and then amplified. The converter includes variable resistance sensors of piezoresistance elements. A bias unit is configured to determine a bias current of the converter and includes bias resistances. An operation amplifier unit receives, as input signals, output signals from the bias unit and the converter, and includes feedback resistances respectively connected to input and output ends of a first operational amplifier. The first operational amplifier is a whole differential operational amplifier including a common-mode feedback circuit.

    摘要翻译： 放大器电路包括被配置为将预定义的物理量转换为电阻值的转换器，并且由转换器转换的电阻值被转换为电压值然后被放大。 转换器包括压阻元件的可变电阻传感器。 偏置单元被配置为确定转换器的偏置电流并且包括偏置电阻。 操作放大器单元接收来自偏置单元和转换器的输出信号作为输入信号，并且包括分别连接到第一运算放大器的输入和输出端的反馈电阻。 第一运算放大器是包括共模反馈电路的整体差分运算放大器。

    SEMICONDUCTOR INTEGRATED CIRCUIT AND RADIO COMMUNICATION TERMINAL INCLUDING THE SAME
    8.
    发明申请
    SEMICONDUCTOR INTEGRATED CIRCUIT AND RADIO COMMUNICATION TERMINAL INCLUDING THE SAME 有权
    半导体集成电路和无线电通信终端，包括它们

    公开(公告)号：US20140043099A1

    公开(公告)日：2014-02-13

    申请号：US13931894

    申请日：2013-06-29

    申请人： Renesas Mobile Corporation

    发明人： Yutaka Igarashi ,  Yusaku Katsube

    IPC分类号： H03F1/34

    CPC分类号： H04B1/707 ,  H03F1/34 ,  H03F3/19 ,  H03F3/45076 ,  H03F3/45475 ,  H03F2200/451 ,  H03F2203/45116 ,  H03F2203/45336 ,  H03F2203/45528 ,  H03F2203/45591 ,  H03F2203/45594 ,  H03F2203/45616 ,  H03G1/0088

    摘要： A semiconductor integrated circuit includes an operational amplifier that amplifies a voltage difference between an input voltage supplied to an inverting input terminal and a reference voltage supplied to a non-inverting input terminal and outputs an amplified signal, a feedback resistor that performs negative feedback of the amplified signal to the inverting input terminal of the operational amplifier, and a variable resistor unit that sets a current path with a first resistance value in accordance with a control signal between an external input terminal and the inverting input terminal of the operational amplifier, and sets a first alternative path with a second resistance value in accordance with the control signal between a node on the current path and a reference voltage terminal to which the reference voltage is supplied.

    摘要翻译： 半导体集成电路包括运算放大器，其放大提供给反相输入端的输入电压与提供给非反相输入端的参考电压之间的电压差，并输出放大信号，反馈电阻执行负反馈 放大信号到运算放大器的反相输入端，以及可变电阻单元，其根据运算放大器的外部输入端和反相输入端之间的控制信号设定具有第一电阻值的电流路径，并且设置 根据电流路径上的节点与提供参考电压的参考电压端子之间的控制信号，具有第二电阻值的第一替代路径。

    Low Noise Amplifier with Current Bleeding Branch
    9.
    发明申请
    Low Noise Amplifier with Current Bleeding Branch 有权
    低噪声放大器，具有电流出血分支

    公开(公告)号：US20120025911A1

    公开(公告)日：2012-02-02

    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： H03F1/22 ,  H03F3/45 ,  H03F3/04

    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。