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    BUFFER CIRCUIT ROBUST TO VARIATION OF REFERENCE VOLTAGE SIGNAL
    3.
    发明申请
    BUFFER CIRCUIT ROBUST TO VARIATION OF REFERENCE VOLTAGE SIGNAL 有权
    缓冲电路稳定参考电压信号变化

    公开(公告)号：US20160164479A1

    公开(公告)日：2016-06-09

    申请号：US14959195

    申请日：2015-12-04

    申请人： SAMSUNG ELECTRONICS CO., LTD.

    发明人： YOON-JOO EOM ,  SEUNG-JUN BAE ,  DAE-SIK MOON ,  JOON-YOUNG PARK ,  MIN-SU AHN

    IPC分类号： H03F3/45 ,  H03D7/14

    CPC分类号： H03D7/1441 ,  H03F3/45183 ,  H03F2203/45051 ,  H03F2203/45466 ,  H03F2203/45674 ,  H03F2203/45702 ,  H03K19/00361

    摘要： A buffer circuit includes a first differential amplifier, second differential amplifier, third differential amplifier, and mixer. The first differential amplifier generates a positive differential signal and a negative differential signal based on an input signal and a reference voltage signal. The second differential amplifier generates a first signal based on the positive differential signal and the negative differential signal. The third differential amplifier generates a second signal having a different phase from the first signal based on the positive differential signal and the negative differential signal. The mixer outputs a signal, generated by mixing the first signal and the second signal, as an output signal.

    摘要翻译： 缓冲电路包括第一差分放大器，第二差分放大器，第三差分放大器和混频器。 第一差分放大器基于输入信号和参考电压信号产生正差分信号和负差分信号。 第二差分放大器基于正差分信号和负差分信号产生第一信号。 第三差分放大器基于正差分信号和负差分信号产生具有与第一信号不同相位的第二信号。 混频器输出通过混合第一信号和第二信号而产生的信号作为输出信号。

    High performance GaN operational amplifier with wide bandwidth and high dynamic range
    4.
    发明授权
    High performance GaN operational amplifier with wide bandwidth and high dynamic range 有权
    具有宽带宽和高动态范围的高性能GaN运算放大器

    公开(公告)号：US09276529B1

    公开(公告)日：2016-03-01

    申请号：US14506070

    申请日：2014-10-03

    申请人： HRL Laboratories, LLC

    发明人： David F. Brown ,  Miroslav Micovic ,  Ara K. Kurdoghlian ,  Alexandros Margomenos

    IPC分类号： H03F3/45 ,  H03F1/48 ,  H03F3/193 ,  H03F3/68

    CPC分类号： H03F3/45179 ,  H03F3/193 ,  H03F3/195 ,  H03F3/45183 ,  H03F2200/408 ,  H03F2200/451 ,  H03F2203/45051 ,  H03F2203/45394 ,  H03F2203/45512 ,  H03F2203/45528 ,  H03F2203/45644 ,  H03F2203/45648 ,  H03F2203/45652

    摘要： An operational amplifier includes three transconductance stages (TSs) each having a differential input and a differential output, a first and second resistor coupled between the differential output of the first TS and the differential input of the first TS, a third and fourth resistor coupled between the differential output of the third TS and the differential input of the first TS, a first and second capacitor coupled between the differential output of the third TS and the differential input of the third TS, wherein the first, second, and third TSs each include a differential input amplifier coupled to the differential input of the respective TS, a differential output amplifier coupled to the differential output of the respective TS, and a plurality of Schottky diodes coupled between the differential input amplifier and the differential output amplifier for voltage level shifting.

    摘要翻译： 运算放大器包括三个跨导级（TS），每个跨导级具有差分输入和差分输出;耦合在第一TS的差分输出和第一TS的差分输入之间的第一和第二电阻，耦合在第一TS的差分输出之间的第三和第四电阻 第三TS的差分输出和第一TS的差分输入，耦合在第三TS的差分输出与第三TS的差分输入之间的第一和第二电容器，其中第一，第二和第三TS各自包括 耦合到相应TS的差分输入的差分输入放大器，耦合到相应TS的差分输出的差分输出放大器以及耦合在差分输入放大器和用于电压电平转换的差分输出放大器之间的多个肖特基二极管。

    INPUT BUFFER APPARATUSES AND METHODS
    5.
    发明申请
    INPUT BUFFER APPARATUSES AND METHODS 有权
    输入缓冲器设备和方法

    公开(公告)号：US20150116034A1

    公开(公告)日：2015-04-30

    申请号：US14589082

    申请日：2015-01-05

    申请人： Micron Technology, Inc.

    发明人： Jennifer Taylor ,  Dragos Dimitriu

    IPC分类号： H03F3/45

    CPC分类号： H03F3/45179 ,  G11C7/1084 ,  H03F3/45183 ,  H03F2203/45051

    摘要： Apparatuses and methods are disclosed, including an apparatus with a first differential amplifier to amplify an input signal into a first output signal, a second differential amplifier to amplify the input signal into a second output signal that is complementary to the first output signal, and a feedback resistance coupled between the first output signal and the second output signal. Additional apparatuses and methods are described.

    摘要翻译： 公开了一种装置和方法，包括具有将输入信号放大为第一输出信号的第一差分放大器的装置，将输入信号放大为与第一输出信号互补的第二输出信号的第二差分放大器，以及 耦合在第一输出信号和第二输出信号之间的反馈电阻。 描述附加的装置和方法。

    HEADPHONE AMPLIFIER
    6.
    发明申请
    HEADPHONE AMPLIFIER 有权
    耳机放大器

    公开(公告)号：US20130266157A1

    公开(公告)日：2013-10-10

    申请号：US13857580

    申请日：2013-04-05

    申请人： MARVELL WORLD TRADE LTD.

    发明人： Hao Zhou ,  Tao Shui ,  Yonghua Song ,  Yongxu Wang ,  Haiqing Zhang

    IPC分类号： H03G3/20

    CPC分类号： H03G3/20 ,  H03F1/083 ,  H03F1/34 ,  H03F3/21 ,  H03F3/45475 ,  H03F2200/03 ,  H03F2200/153 ,  H03F2200/408 ,  H03F2200/462 ,  H03F2203/45051 ,  H03F2203/45138 ,  H03F2203/45166 ,  H03F2203/45522 ,  H03F2203/45526 ,  H03G1/007 ,  H03G1/0088 ,  H03G3/3015 ,  H03G3/3026

    摘要： Aspects of the disclosure process an amplifier circuit. The amplifier circuit includes an input stage, an intermediate stage, an output stage and a detecting and controlling circuit. The input stage is configured to receive an electrical signal for amplification. The intermediate stage is configured to amplify with an adjustable gain. The output stage is configured to drive an audio output device in response to the amplified electrical signal. The detecting and controlling circuit is configured to detect a current for driving the audio output device, and adjust the gain of the intermediate stage based on the current to compensate for a pole change of the amplifier circuit due to a change of the current.

    摘要翻译： 披露过程的方面放大器电路。 放大器电路包括输入级，中间级，输出级和检测和控制电路。 输入级被配置为接收用于放大的电信号。 中间级被配置为以可调增益放大。 输出级被配置为响应于放大的电信号来驱动音频输出设备。 检测和控制电路被配置为检测用于驱动音频输出装置的电流，并且基于电流来调整中间级的增益，以补偿由于电流的变化引起的放大器电路的极点变化。

    Differential-to-single ended translator that generates an output signal with very small signal distortion
    8.
    发明授权
    Differential-to-single ended translator that generates an output signal with very small signal distortion 失效
    差分到单端转换器，产生具有非常小的信号失真的输出信号

    公开(公告)号：US5491455A

    公开(公告)日：1996-02-13

    申请号：US337259

    申请日：1994-11-10

    申请人： James R. Kuo

    发明人： James R. Kuo

    IPC分类号： H03F1/32 ,  H03F3/45 ,  H03K5/24

    CPC分类号： H03F3/45179 ,  H03F1/3211 ,  H03F3/45076 ,  H03F3/4521 ,  H03K5/2481 ,  H03F2203/45004 ,  H03F2203/45051 ,  H03F2203/45188 ,  H03F2203/45241 ,  H03F2203/45466

    摘要： A translator circuit amplifies a pair of differential input signals to produce a pair of intermediate differential signals by utilizing a pair of cross-coupled differential gain stages. The gain stages amplify the input signals to balance the capacitive loading. The pair of intermediate differential signals are formed to be substantially equal and 180.degree. out of phase. The current sources of the gain stages are connected together and controlled by the outputs of the gain stages to reduce the rise and fall times of the intermediate differential signals. The translator circuit also converts the pair of intermediate differential signals to a single-ended output signal by utilizing a first differential pair to produce the output signal, and a second differential pair to adaptively control the current source of the first differential pair, thereby reducing the rise and fall times of the output signal. As a result, the translator circuit is capable of producing the output signal with minimum distortion. Therefore, a duty cycle of approximately 50% can be achieved.

    摘要翻译： 转换器电路通过利用一对交叉耦合的差分增益级来放大一对差分输入信号以产生一对中间差分信号。 增益级放大输入信号以平衡电容负载。 一对中间差分信号形成为大致相等且相位相差180度。 增益级的电流源连接在一起，并由增益级的输出控制，以减少中间差分信号的上升和下降时间。 转换器电路还通过利用第一差分对来产​​生输出信号而将一对中间差分信号转换为单端输出信号，以及第二差分对以自适应地控制第一差分对的电流源，从而减少 上升和下降的输出信号的时间。 结果，转换器电路能够产生具有最小失真的输出信号。 因此，可以实现约50％的占空比。

    High-Speed, High-Voltage GaN-Based Operational Amplifier
    10.
    发明申请
    High-Speed, High-Voltage GaN-Based Operational Amplifier 审中-公开
    高速，高电压GaN基运算放大器

    公开(公告)号：US20170019069A1

    公开(公告)日：2017-01-19

    申请号：US14800928

    申请日：2015-07-16

    申请人： Eridan Communications, Inc.

    发明人： Marnie Dunsmore

    IPC分类号： H03F1/02 ,  H03F3/45 ,  H03F3/217 ,  H03F3/193 ,  H03F3/21

    CPC分类号： H03F1/0211 ,  H03F1/0222 ,  H03F3/193 ,  H03F3/2171 ,  H03F3/45183 ,  H03F3/45475 ,  H03F3/505 ,  H03F2200/102 ,  H03F2200/411 ,  H03F2200/451 ,  H03F2203/45051 ,  H03F2203/45612 ,  H03F2203/45652 ,  H03F2203/45722

    摘要： A high-speed, high-voltage gallium nitride based (GaN-based) operational amplifier (op amp) is disclosed. The combined high-speed, high-voltage capability allows the GaN-based op amp to serve as a dynamic power supply (DPS) for a radio frequency power amplifier (RFPA). When serving as a DPS for an RFPA, the GaN-based op amp is capable of supplying ampere-scale currents that accurately track rapidly-varying envelopes of non-constant envelope RF signals, thereby allowing the RFPA to convert high-bandwidth non-constant envelope RF signals to high RF output powers with high signal envelope accuracy.

    摘要翻译： 公开了一种高速高压氮化镓基（GaN系）运算放大器（运算放大器）。 组合的高速，高压能力使得GaN基运算放大器可以用作射频功率放大器（RFPA）的动态电源（DPS）。 当作为RFPA的DPS时，基于GaN的运算放大器能够提供精确跟踪非恒定包络RF信号的快速变化的包络的安培级电流，从而允许RFPA将高带宽非常数 包络RF信号到具有高信号包络精度的高RF输出功率。