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    AMPLIFIER LINEARIZATION AND RELATED APPARATUS THEREOF
    1.
    发明申请
    AMPLIFIER LINEARIZATION AND RELATED APPARATUS THEREOF 审中-公开

    公开(公告)号：US20190253025A1

    公开(公告)日：2019-08-15

    申请号：US16273261

    申请日：2019-02-12

    申请人： MEDIATEK Singapore Pte. Ltd.

    发明人： Zhiming Deng ,  Osama Shanaa

    IPC分类号： H03F1/32 ,  H03F1/02 ,  H03F1/56 ,  H03F3/213

    CPC分类号： H03F1/3247 ,  H03F1/0227 ,  H03F1/223 ,  H03F1/3205 ,  H03F1/3211 ,  H03F1/56 ,  H03F3/213 ,  H03F3/45188 ,  H03F3/45475 ,  H03F2200/211

    摘要： Some embodiments relate to a device, comprising an amplifier and a linearizer, the linearizer comprising a first transistor, the first transistor comprising a first terminal coupled to an input of the amplifier, a second terminal configured to be coupled to a DC supply voltage, and a control terminal configured to control a current flowing between the first and second terminals and configured to receive a DC bias voltage different from a voltage of the first terminal. Some embodiments relate to a device, comprising an amplifier, comprising an input, an output, and a first set of one or more transistors coupled between the input and the output, and a linearizer, comprising a second set of one or more transistors coupled between a DC supply voltage and the input of the amplifier, wherein the first set of transistors and the second set of transistors have a same topology.

    INTEGRATED RF LIMITER
    3.
    发明申请
    INTEGRATED RF LIMITER 审中-公开

    公开(公告)号：US20180019714A1

    公开(公告)日：2018-01-18

    申请号：US15663322

    申请日：2017-07-28

    申请人： Skyworks Solutions, Inc.

    发明人： Thomas William Arell

    IPC分类号： H03F1/52 ,  H03F3/193

    CPC分类号： H03F1/523 ,  H03F3/193 ,  H03F3/195 ,  H03F2200/211 ,  H03F2200/444 ,  H03F2200/451 ,  H03G7/00 ,  H03G11/00

    摘要： A limiter circuit is integrated into an RF power amplifier. The limiter circuit automatically starts adding attenuation at the input of the RF power amplifier after a predetermined input power level threshold is exceeded, thereby extending the safe input drive level to protect the amplifier. In a preferred embodiment of the invention, the limiter circuit is implemented using a pseudomorphic high electron mobility transistor (PHEMT) device or a metal semiconductor field effect transistor (MESFET) device. Diode connected transistors or Schottky diodes may also be used in the limiter circuit.

    COMMUNICATION DEVICE, RECEPTION POWER MONITORING DEVICE, AND COMMUNICATION DEVICE SYSTEM
    8.
    发明申请
    COMMUNICATION DEVICE, RECEPTION POWER MONITORING DEVICE, AND COMMUNICATION DEVICE SYSTEM 有权
    通信设备，接收电力监控设备和通信设备系统

    公开(公告)号：US20160028500A1

    公开(公告)日：2016-01-28

    申请号：US14774192

    申请日：2014-02-06

    申请人： NEC CORPORATION

    发明人： Satoshi IINO

    IPC分类号： H04B17/318 ,  H03K3/356

    CPC分类号： H04B17/318 ,  H03F3/189 ,  H03F3/245 ,  H03F3/45475 ,  H03F2200/211 ,  H03F2200/411 ,  H03F2203/45528 ,  H03F2203/45594 ,  H03G3/3068 ,  H03K3/356 ,  H04B1/3877 ,  H04B2001/0416

    摘要： A communication device system includes a communication device (1) and a reception power monitoring device (2). The communication device (1) includes a reception processing unit (10) that outputs a signal intensity voltage (Vin) in accordance with a signal level of a received signal, and a monitoring terminal signal generator circuit (30) that generates a monitoring terminal signal (Vout) by current amplification of a level shift voltage generated by shifting a level of the signal intensity voltage (Vin) by an offset voltage (Voff) corresponding to a voltage value of a power supply voltage of an external device. The reception power monitoring device (2) includes a constant voltage generator circuit that outputs a constant voltage from the monitoring terminal signal (Vout), and a voltage converter circuit that operates based on the constant voltage and outputs a display level indication signal reflecting a voltage level of the monitoring terminal signal (Vout).

    摘要翻译： 通信装置系统包括通信装置（1）和接收功率监视装置（2）。 通信设备（1）包括：接收处理单元（10），其根据接收信号的信号电平输出信号强度电压（Vin）;以及监视终端信号发生器电路（30），其生成监视终端信号 通过将信号强度电压（Vin）的电平移位与对应于外部设备的电源电压的电压值的偏移电压（Voff）产生的电平移位电压的电流放大来实现（Vout）。 接收功率监视装置（2）包括从监视终端信号（Vout）输出恒定电压的恒压发生电路，以及基于该恒定电压进行动作的电压转换电路，输出反映电压的显示电平指示信号 监视终端信号（Vout）的电平。

    Power amplifier
    9.
    发明授权
    Power amplifier 有权
    功率放大器

    公开(公告)号：US08629724B2

    公开(公告)日：2014-01-14

    申请号：US13362716

    申请日：2012-01-31

    申请人： Youn Suk Kim ,  Jun Goo Won ,  Shinichi Iizuka ,  Ki Joong Kim

    发明人： Youn Suk Kim ,  Jun Goo Won ,  Shinichi Iizuka ,  Ki Joong Kim

    IPC分类号： H03F3/191

    CPC分类号： H03F1/3205 ,  H03F1/56 ,  H03F3/19 ,  H03F2200/211 ,  H03F2200/213 ,  H03F2200/222

    摘要： There is provided a power amplifier which may suppress fluctuations in a phase of an output signal in accordance with fluctuations in a level of an input signal by varying an impedance between a signal input terminal and an amplification unit in accordance with a power level of an input signal. The power amplifier includes a bias voltage generation unit generating a bias voltage set in accordance with a power level of an input signal, an amplification unit amplifying the power level of the input signal in accordance with the bias voltage, and an impedance variation unit varying an impedance of a signal transmission path through which the input signal is transmitted to the amplification unit in accordance with the bias voltage.

    摘要翻译： 提供了一种功率放大器，其可以根据输入信号的电平的波动来抑制输出信号的相位的波动，通过根据输入的功率电平改变信号输入端子和放大单元之间的阻抗 信号。 功率放大器包括：偏置电压产生单元，其生成根据输入信号的功率电平设定的偏置电压;放大单元，其根据偏置电压放大输入信号的功率电平;以及阻抗变化单元， 根据偏置电压将输入信号传输到放大单元的信号传输路径的阻抗。

    Energy-efficient consumer device audio power output stage
    10.
    发明授权
    Energy-efficient consumer device audio power output stage 有权
    节能消费者设备音频功率输出阶段

    公开(公告)号：US08311243B2

    公开(公告)日：2012-11-13

    申请号：US11610496

    申请日：2006-12-13

    申请人： John Christopher Tucker ,  Daniel John Allen ,  John L. Melanson ,  Ammisetti Prasad

    发明人： John Christopher Tucker ,  Daniel John Allen ,  John L. Melanson ,  Ammisetti Prasad

    IPC分类号： H03F99/00

    CPC分类号： H03G3/004 ,  H02M3/07 ,  H03F1/0227 ,  H03F1/025 ,  H03F3/183 ,  H03F2200/03 ,  H03F2200/211 ,  H03F2200/507 ,  H03G3/20 ,  H03G3/3031

    摘要： An energy-efficient consumer device audio power output stage provides improved battery life and reduced power dissipation. A power supply having a selectable operating mode supplies the power supply rails to the power amplified output stage. The operating mode is controlled in conformity with the audio signal level, which may be determined from a volume control setting of the device and/or from a signal level detector that determines the amplitude of the signal being amplified. The power supply may be a charge pump in which the operating mode uses a capacitive divider to provide for selection of a power supply output voltage that is a rational fraction of the power supply output voltage in a full-voltage operating mode.

    摘要翻译： 节能消费者设备音频功率输出级提供更好的电池寿命和更低的功耗。 具有可选操作模式的电源将电源轨提供给功率放大输出级。 操作模式根据音频信号电平进行控制，音频信号电平可以根据设备的音量控制设置和/或从确定被放大的信号的幅度的信号电平检测器确定。 电源可以是电荷泵，其中操作模式使用电容分压器来提供在全电压工作模式下选择作为电源输出电压的有效部分的电源输出电压。