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20 条记录 (耗时 0.024 秒)

    Transmit spectral regrowth cancellation at receiver port
    11.
    发明授权
    Transmit spectral regrowth cancellation at receiver port 有权

    公开(公告)号：US09935662B2

    公开(公告)日：2018-04-03

    申请号：US15131417

    申请日：2016-04-18

    申请人： RF Micro Devices, Inc.

    发明人： Nadim Khlat ,  Andrew F. Folkmann

    IPC分类号： H04B1/00 ,  H04B1/04 ,  H04L5/14

    CPC分类号： H04B1/006 ,  H03F3/24 ,  H04B1/0458 ,  H04B1/0475 ,  H04B2001/0408 ,  H04L5/14

    摘要： A front-end module configured to cancel unwanted transmit spectrum at one or more receivers comprises at least one transmitter having a power amplifier and configured to transmit signals to an antenna. The front-end module also comprises at least one receiver to receive the transmit signals, wherein the at least one receiver receives at least a portion of unwanted transmit spectrum. A directional coupler couples at least a portion of a transmit output signal from the power amplifier to provide a coupled transmit output signal to signal conditioning circuitry associated with the at least one receiver and configured to condition the coupled transmit output signal to generate a conditioned transmit signal to provide to the at least one receiver, wherein the conditioned transmit signal at least partially cancels the unwanted transmit spectrum. The signal conditioning circuitry may adjust the amplitude and phase of the coupled transmit output signal.

    RF LADDER FILTER WITH SIMPLIFIED ACOUSTIC RF RESONATOR PARALLEL CAPACITANCE COMPENSATION
    12.
    发明申请
    RF LADDER FILTER WITH SIMPLIFIED ACOUSTIC RF RESONATOR PARALLEL CAPACITANCE COMPENSATION 有权
    射频梯形滤波器，具有简化的声学RF谐振器并联电容补偿

    公开(公告)号：US20160191012A1

    公开(公告)日：2016-06-30

    申请号：US15004084

    申请日：2016-01-22

    申请人： RF Micro Devices, Inc.

    发明人： Nadim Khlat ,  Andrew F. Folkmann ,  Robert Aigner ,  Marcus Granger-Jones

    IPC分类号： H03H9/58 ,  H03H9/205

    CPC分类号： H03H9/542 ,  H03H9/605 ,  H03H9/6483 ,  H03H9/6489

    摘要： An RF ladder filter having a parallel capacitance compensation circuit is disclosed. The parallel capacitance compensation circuit is made up of a first inductive element with a first T-terminal and a first end coupled to a first ladder terminal and a second inductive element with a second T-terminal that is coupled to the first T-terminal of the first inductive element and a second end coupled to a second ladder terminal. Further included is a compensating acoustic RF resonator (ARFR) having a fixed node terminal and a third T-terminal that is coupled to the first T-terminal of the first inductive element and the second T-terminal of the second inductive element, and a finite number of series-coupled ladder ARFRs, wherein the parallel capacitance compensation circuit is coupled across one of the finite number of series-coupled ARFRs by way of the first ladder terminal and the second ladder terminal.

    摘要翻译： 公开了一种具有并联电容补偿电路的RF梯形滤波器。 并联电容补偿电路由具有第一T端和第一端耦合到第一梯形终端的第一电感元件和与第二电感元件耦合的第二电感元件组成，第二电感元件连接到第一T端的第一T端 第一电感元件和耦合到第二梯形终端的第二端。 还包括具有固定节点终端的补偿声RF谐振器（ARFR）和耦合到第一电感元件的第一T端和第二电感元件的第二T端的第三T端，以及 有限数量的串联耦合梯形ARFR，其中并联电容补偿电路通过第一梯形终端和第二梯形终端耦合在有限数量的串联耦合ARFR之一上。

    De-multiplexing a radio frequency input signal using output transformer circuitry
    13.
    发明授权
    De-multiplexing a radio frequency input signal using output transformer circuitry 有权

    公开(公告)号：US09331836B2

    公开(公告)日：2016-05-03

    申请号：US14029015

    申请日：2013-09-17

    申请人： RF Micro Devices, Inc.

    发明人： Nadim Khlat ,  Ruediger Bauder ,  Andrew F. Folkmann

    IPC分类号： H04B7/005 ,  H04B7/00 ,  H04L12/50 ,  H04B1/04 ,  H04L5/14

    CPC分类号： H04L5/14 ,  H04B1/0483

    摘要： The present disclosure relates to de-multiplexing at least one RF input signal feeding RF power amplifier circuitry to create multiple de-multiplexed RF output signals, which may be used to provide RF transmit signals in an RF communications system. Output transformer circuitry is coupled to outputs from the RF power amplifier circuitry to provide the de-multiplexed RF output signals, which may support multiple modes, multiple frequency bands, or both. The de-multiplexed RF output signals may be used in place of RF switching elements in certain embodiments. As a result, RF front-end switching circuitry in the RF communications system may be simplified, thereby reducing insertion losses, reducing costs, reducing size, or any combination thereof. Additionally, the output transformer circuitry may provide load line transformation, output transistor biasing, or both to the RF power amplifier circuitry.

    RF ladder filter with simplified acoustic RF resonator parallel capacitance compensation
    14.
    发明授权
    RF ladder filter with simplified acoustic RF resonator parallel capacitance compensation 有权

    公开(公告)号：US09837984B2

    公开(公告)日：2017-12-05

    申请号：US15004084

    申请日：2016-01-22

    申请人： RF Micro Devices, Inc.

    发明人： Nadim Khlat ,  Andrew F. Folkmann ,  Robert Aigner ,  Marcus Granger-Jones

    IPC分类号： H03H9/54 ,  H03H9/64 ,  H03H9/60

    CPC分类号： H03H9/542 ,  H03H9/605 ,  H03H9/6483 ,  H03H9/6489

    摘要： An RF ladder filter having a parallel capacitance compensation circuit is disclosed. The parallel capacitance compensation circuit is made up of a first inductive element with a first T-terminal and a first end coupled to a first ladder terminal and a second inductive element with a second T-terminal that is coupled to the first T-terminal of the first inductive element and a second end coupled to a second ladder terminal. Further included is a compensating acoustic RF resonator (ARFR) having a fixed node terminal and a third T-terminal that is coupled to the first T-terminal of the first inductive element and the second T-terminal of the second inductive element, and a finite number of series-coupled ladder ARFRs, wherein the parallel capacitance compensation circuit is coupled across one of the finite number of series-coupled ARFRs by way of the first ladder terminal and the second ladder terminal.

    Power amplifier spurious cancellation
    16.
    发明授权
    Power amplifier spurious cancellation 有权
    功率放大器杂散消除

    公开(公告)号：US09444415B2

    公开(公告)日：2016-09-13

    申请号：US14202493

    申请日：2014-03-10

    申请人： RF Micro Devices, Inc.

    发明人： Andrew F. Folkmann

    IPC分类号： H03F1/30 ,  H03F3/19 ,  H03F3/21 ,  H03F1/32 ,  H03F3/24 ,  H03G3/30 ,  H03F1/02

    CPC分类号： H03F3/19 ,  H03F1/0244 ,  H03F1/3247 ,  H03F3/21 ,  H03F3/245 ,  H03F2200/411 ,  H03G3/3042

    摘要： This disclosure relates generally to power amplification devices and methods of operating the same. The power amplification devices are capable of reducing (and possibly cancelling) modulation of a ripple variation of a supply voltage level of a supply voltage onto a radio frequency (RF) signal. In one embodiment, a power amplification device includes a power amplification circuit configured to amplify an RF signal with a supply voltage such that a ripple variation in a supply voltage level of the supply voltage is modulated onto the RF signal in accordance with a conversion gain. However, the power amplification device also includes a plurality of ripple rejection circuits. The plurality of ripple rejection circuits is configured to produce phase shifts and one or more amplitude shifts in the RF signal so as to reduce the conversion gain of the power amplification circuit.

    摘要翻译： 本公开一般涉及功率放大装置及其操作方法。 功率放大装置能够减少（并且可能地消除）将电源电压的电源电压电平的纹波变化调制到射频（RF）信号上。 在一个实施例中，功率放大装置包括功率放大电路，功率放大电路被配置为利用电源电压放大RF信号，使得电源电压的电源电压电平的纹波变化根据转换增益被调制到RF信号上。 然而，功率放大装置还包括多个纹波抑制电路。 多个纹波抑制电路被配置为产生RF信号中的相移和一个或多个幅度偏移，以便降低功率放大电路的转换增益。

    FREQUENCY SELECTIVE PREDISTORTION
    18.
    发明申请
    FREQUENCY SELECTIVE PREDISTORTION 有权
    频率选择性预测

    公开(公告)号：US20150139359A1

    公开(公告)日：2015-05-21

    申请号：US14548129

    申请日：2014-11-19

    申请人： RF Micro Devices, Inc.

    发明人： Andrew F. Folkmann ,  Nadim Khlat

    IPC分类号： H04L25/08 ,  H03F3/24 ,  H03F1/32 ,  H03F3/19

    CPC分类号： H04L25/08 ,  H03F1/0211 ,  H03F1/0261 ,  H03F1/0266 ,  H03F1/3247 ,  H03F3/19 ,  H03F3/245 ,  H03F2200/102 ,  H03F2201/3215 ,  H03F2201/3227

    摘要： A baseband PA predistortion module, which includes a baseband combiner, a baseband PA correction circuit, and a baseband filter, is disclosed. The baseband PA correction circuit replicates behavior of an RF PA by processing a modulation data signal to provide a predistortion data signal. The behavior of the RF PA includes distortion. The modulation data signal is representative of an RF input signal to an RF PA and the predistortion data signal is representative of a correction needed at an output of the RF PA. The baseband filter receives and filters the predistortion data signal to provide a reduced predistortion data signal, such that a low frequency content of the reduced predistortion data signal is less than a low frequency content of the predistortion data signal. The baseband combiner receives and combines the modulation data signal and the reduced predistortion data signal to provide a baseband transmit signal.

    摘要翻译： 公开了一种基带PA预失真模块，其包括基带组合器，基带PA校正电路和基带滤波器。 基带PA校正电路通过处理调制数据信号来复制RF PA的行为以提供预失真数据信号。 RF PA的行为包括失真。 调制数据信号表示到RF PA的RF输入信号，并且预失真数据信号表示在RF PA的输出处所需的校正。 基带滤波器接收并过滤预失真数据信号以提供减少的预失真数据信号，使得减少的预失真数据信号的低频内容小于预失真数据信号的低频内容。 基带组合器接收并组合调制数据信号和减少的预失真数据信号以提供基带发射信号。

    DUAL PARALLEL AMPLIFIER BASED DC-DC CONVERTER
    19.
    发明申请
    DUAL PARALLEL AMPLIFIER BASED DC-DC CONVERTER 有权
    双路并联放大器基于DC-DC转换器

    公开(公告)号：US20130176075A1

    公开(公告)日：2013-07-11

    申请号：US13782142

    申请日：2013-03-01

    申请人： RF Micro Devices, Inc.

    发明人： Michael R. Kay ,  Andrew F. Folkmann ,  Nadim Khlat ,  Philippe Gorisse

    IPC分类号： G05F1/46 ,  H03F1/02

    CPC分类号： G05F1/46 ,  H03F1/02 ,  H03F1/0266 ,  H03F3/195 ,  H03F3/24 ,  H03F2200/432 ,  H03F2200/555

    摘要： A direct current (DC)-DC converter, which includes switching circuitry, a first parallel amplifier, and a second parallel amplifier, is disclosed. The switching circuitry has a switching circuitry output. The first parallel amplifier has a first feedback input and a first parallel amplifier output. The second parallel amplifier has a second feedback input and a second parallel amplifier output. A first inductive element is coupled between the switching circuitry output and the first feedback input. A second inductive element is coupled between the first feedback input and the second feedback input.

    摘要翻译： 公开了一种直流（DC）-DC转换器，其包括开关电路，第一并联放大器和第二并联放大器。 开关电路具有开关电路输出。 第一并联放大器具有第一反馈输入和第一并联放大器输出。 第二并联放大器具有第二反馈输入和第二并联放大器输出。 第一电感元件耦合在开关电路输出和第一反馈输入之间。 第二感应元件耦合在第一反馈输入和第二反馈输入之间。