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    Split band filtering with two saw filters and single tunable filter
    181.
    发明授权
    Split band filtering with two saw filters and single tunable filter 有权

    公开(公告)号：US09906354B2

    公开(公告)日：2018-02-27

    申请号：US14254343

    申请日：2014-04-16

    Applicant: RF Micro Devices, Inc.

    Inventor： Nadim Khlat

    IPC: H04L5/14 ,  H04B1/00 ,  H04B1/10 ,  H04L5/08

    CPC classification number: H04L5/1461 ,  H04B1/006 ,  H04B1/0064 ,  H04B1/1027 ,  H04B2001/1072 ,  H04L5/08 ,  H04L5/14

    Abstract: The disclosure includes communication circuitry with a tunable filter configured to tunably filter in a split band. In a first embodiment, communication circuitry includes a tunable filter and a first additional filter. The communication circuitry is configured to communicate within a low target band and within a high target band, wherein an exclusion band is located between the low target band and the high target band. The tunable filter is configured to filter within a low tunable band when tuned within the low tunable band, and configured to filter within a high tunable band when tuned within the high tunable band. The first additional filter is configured to filter in a first additional filter band located in an upper edge of the low target band.

    RF triplexer architecture
    182.
    发明授权
    RF triplexer architecture 有权

    公开(公告)号：US09893709B2

    公开(公告)日：2018-02-13

    申请号：US14673192

    申请日：2015-03-30

    Applicant: RF Micro Devices, Inc.

    Inventor： Nadim Khlat ,  Marcus Granger-Jones

    IPC: H03H7/46 ,  H03H9/70 ,  H03H7/01 ,  H01P5/22 ,  H03H9/72 ,  H04B1/525 ,  H04B1/58

    CPC classification number: H03H7/46 ,  H01P5/22 ,  H01P5/227 ,  H03H7/0138 ,  H03H7/463 ,  H03H9/706 ,  H03H9/725 ,  H04B1/525 ,  H04B1/58

    Abstract: RF circuitry, which includes a first hybrid RF coupler, a second hybrid RF coupler, a third hybrid RF coupler, and RF filter circuitry, is disclosed. The first hybrid RF coupler provides a first main port, a first pair of quadrature ports, and an isolation port. The second hybrid RF coupler provides a second main port and a second pair of quadrature ports. The third hybrid RF coupler provides a third main port and a third pair of quadrature ports. RF filter circuitry is coupled to the first pair of quadrature ports, the second pair of quadrature ports, and the third pair of quadrature ports. The first main port, the second main port, and the third main port provide main ports of the RF triplexer. The isolation port is a common port of the RF triplexer for coupling to an RF antenna.

    Antenna tuning circuitry with reduced interference
    183.
    发明授权
    Antenna tuning circuitry with reduced interference 有权

    公开(公告)号：US09865922B2

    公开(公告)日：2018-01-09

    申请号：US14465142

    申请日：2014-08-21

    Applicant: RF Micro Devices, Inc.

    Inventor： Daniel Charles Kerr ,  Christian Rye Iversen ,  Eric K. Bolton ,  Ruediger Bauder ,  Nadim Khlat

    IPC: H01Q5/328 ,  H01Q5/335

    CPC classification number: H01Q5/328 ,  H01Q5/335

    Abstract: Antenna tuning circuitry includes an antenna tuning node, an antenna tuning switch, and a resonant tuning circuit. The antenna tuning node is coupled to a resonant conduction element of an antenna. The antenna tuning switch and the resonant tuning circuit are coupled in series between the antenna tuning switch and the antenna tuning node, such that the resonant tuning circuit is between the antenna tuning node and the antenna tuning switch. The resonant tuning circuit is configured to resonate at one or more harmonic frequencies generated by the antenna tuning switch such that a high impedance path is formed between the antenna tuning switch and the antenna tuning node at harmonic frequencies generated by the antenna tuning switch. Accordingly, harmonic interference generated by the antenna tuning switch is prevented from reaching the antenna, while simultaneously allowing for tuning of the antenna.

    High linearity antenna swapping circuitry
    184.
    发明授权
    High linearity antenna swapping circuitry 有权

    公开(公告)号：US09735850B2

    公开(公告)日：2017-08-15

    申请号：US15084142

    申请日：2016-03-29

    Applicant: RF Micro Devices, Inc.

    Inventor： Nadim Khlat ,  Marcus Granger-Jones

    IPC: H04B1/44 ,  H04B7/06 ,  H04B1/00 ,  H04B1/401

    CPC classification number: H04B7/0608 ,  H04B1/0053 ,  H04B1/0064 ,  H04B1/0458 ,  H04B1/18 ,  H04B1/401 ,  H04B7/0602 ,  H04B7/0802

    Abstract: Antenna swapping circuitry includes a first pole, a second pole, a first throw, a second throw, and a number of switching elements. A first switching element is coupled between the first pole and the first throw. A second switching element is coupled between the first pole and the second throw. A third switching element is coupled between the second pole and the first throw. A fourth switching element is coupled between the second pole and the second throw. A linearity of the first switching element and the fourth switching element is higher in a closed state of operation than in an open state of operation. A linearity of the second switching element and a third switching element is higher in an open state of operation than in a closed state of operation.

    Triplexer architecture for aggregation
    185.
    发明授权
    Triplexer architecture for aggregation 有权

    公开(公告)号：US09729191B2

    公开(公告)日：2017-08-08

    申请号：US14659314

    申请日：2015-03-16

    Applicant: RF Micro Devices, Inc.

    Inventor： Nadim Khlat ,  Marcus Granger-Jones

    IPC: H04L5/00 ,  H04B1/525

    CPC classification number: H04B1/525

    Abstract: RF circuitry, which includes a first hybrid RF coupler, a second hybrid RF coupler, and a third hybrid RF coupler, is disclosed. The first hybrid RF coupler is coupled to a first RF antenna. The second hybrid RF coupler is configured to receive a first lowband RF receive signal via the first RF antenna. The first hybrid RF coupler is configured to receive one of a first midband RF receive signal and a first highband RF receive signal via the first RF antenna. The third hybrid RF coupler configured to receive another of the first midband RF receive signal and the first highband RF receive signal via the first RF antenna.

    Envelope tracking with reduced circuit area and power consumption
    186.
    发明授权
    Envelope tracking with reduced circuit area and power consumption 有权

    公开(公告)号：US09634620B2

    公开(公告)日：2017-04-25

    申请号：US14959954

    申请日：2015-12-04

    Applicant: RF Micro Devices, Inc.

    Inventor： Nadim Khlat ,  Michael R. Kay

    IPC: H04B1/04 ,  H03F1/02 ,  H03F3/19 ,  H03F3/24

    CPC classification number: H03F3/19 ,  H03F1/0227 ,  H03F3/245 ,  H03F2200/102 ,  H03F2200/451

    Abstract: The present disclosure relates to envelope tracking with reduced circuit area and power consumption. In one embodiment, an envelope power converter includes a switching power converter configured to receive a supply voltage and provide an output based on a switching control signal. A holding inductor is coupled between the switching power converter and envelope power supply output node. An offset capacitor is coupled between the envelope power supply output node and control node. In response to a target envelope power supply output voltage, a control circuit is configured to generate the switching control signal and a control voltage to maintain envelope power supply signal at target voltage level. The control circuit is configured to generate switching control signal and control voltage such that supply voltage is provided by switching power converter to holding inductor and offset capacitor is charged to target level without changing voltage of envelope power supply signal.

    RF front end architecture
    187.
    发明授权
    RF front end architecture 有权

    公开(公告)号：US09602146B2

    公开(公告)日：2017-03-21

    申请号：US14611850

    申请日：2015-02-02

    Applicant: RF Micro Devices, Inc.

    Inventor： Marcus Granger-Jones ,  Nadim Khlat

    IPC: H04B1/00 ,  H04L5/14 ,  H04L5/00

    CPC classification number: H04B1/0057 ,  H04B1/006 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/14

    Abstract: RF front end circuitry includes mid/high-band switching circuitry and a carrier-aggregation diplexer. The mid/high-band switching circuitry is configured to receive and selectively route mid-band and high-band signals between a mid/high-band output port and a number of mid/high-band transceiver ports. The carrier-aggregation diplexer is coupled to a first one of the mid/high-band transceiver ports. Further, the carrier-aggregation diplexer is configured to pass mid-band signals between a mid-band diplexer port and the first one of the mid/high-band transceiver ports while attenuating other signals, and pass high-band signals between a high-band diplexer port and the first one of the mid/high-band transceiver ports while attenuating other signals.

    TRANSMIT SPECTRAL REGROWTH CANCELLATION AT RECEIVER PORT
    188.
    发明申请
    TRANSMIT SPECTRAL REGROWTH CANCELLATION AT RECEIVER PORT 有权
    接收端口发送频谱重复取消

    公开(公告)号：US20170026064A1

    公开(公告)日：2017-01-26

    申请号：US15131417

    申请日：2016-04-18

    Applicant: RF Micro Devices, Inc.

    Inventor： Nadim Khlat ,  Andrew F. Folkmann

    IPC: H04B1/04 ,  H04L5/14 ,  H04B1/16

    CPC classification number: H04B1/006 ,  H03F3/24 ,  H04B1/0458 ,  H04B1/0475 ,  H04B2001/0408 ,  H04L5/14

    Abstract: 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.

    Abstract translation: 被配置为在一个或多个接收器处消除不期望的发射频谱的前端模块包括具有功率放大器并被配置为向天线发送信号的至少一个发射机。 前端模块还包括至少一个用于接收发射信号的接收机，其中至少一个接收机接收不想要的发射频谱的至少一部分。 定向耦合器耦合来自功率放大器的发射输出信号的至少一部分，以将耦合的发射输出信号提供给与至少一个接收机相关联的信号调理电路，并且被配置为调节耦合的发射输出信号以产生经调节的发射信号 以提供给所述至少一个接收机，其中经调节的发射信号至少部分地消除不想要的发射频谱。 信号调节电路可以调整耦合的发射输出信号的振幅和相位。

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