Radio frequency systems with tunable filter

    公开(公告)号:US12040541B2

    公开(公告)日:2024-07-16

    申请号:US18199130

    申请日:2023-05-18

    Abstract: Radio frequency (RF) systems with tunable filters are provided herein. In certain embodiments, an RF system includes a first RF processing circuit configured to process a first frequency band of a first communication standard and a second frequency band of a second communication standard. The first frequency band and the second frequency band are close in frequency and/or partially overlapping in frequency. The first RF processing circuit includes a tunable filter for changing the bandwidth of the first RF processing circuit to enhance the robustness of the first RF processing circuit to blocker or jammer signals of a third frequency band.

    Carrier aggregation with switchable impedance and reconfigurable network selection

    公开(公告)号:US11190223B2

    公开(公告)日:2021-11-30

    申请号:US16883937

    申请日:2020-05-26

    Abstract: Described herein are systems configured for carrier aggregation. Systems include a multiplexing circuit having a filter assembly, switching circuit with a switching path, and a switchable impedance. The filters can be designed so that when operated simultaneously (e.g., during multi-band operation) the same inductance can be used allowing the switching network to switch in a particular inductance into the path. The described systems can include an inductance that is coupled to an output port so that when operating in single-band mode, the different paths share the same inductance. Relative to other solutions, the described systems can improve performance (e.g., reduce insertion loss), reduce the number of components in the associated module, reduce manufacturing costs, and the like.

    Integrous signal combiner
    4.
    发明授权

    公开(公告)号:US11082077B2

    公开(公告)日:2021-08-03

    申请号:US16593571

    申请日:2019-10-04

    Abstract: A front-end module (FEM) is disclosed that includes an integrous signal combiner. The integrous signal combiner can process received signals and use a set of resonant circuits to filter signal noise prior to recombination of a plurality of signal bands that form an aggregate carrier signal. These resonant circuits may be placed after a set of low noise amplifiers and can be used to more efficiently reduce noise and parasitic loading within each of a set of signal paths. Each resonant circuit may be configured to filter noise relating to a bandwidth for a signal that is to be combined with the signal of the signal path that includes the resonant circuit. In some implementations, the integrous signal combiner can be a tunable integrous signal combiner with resonant circuits that may be reconfigurable or dynamically configurable.

    Flexible L-network antenna tuner circuit

    公开(公告)号:US10374578B2

    公开(公告)日:2019-08-06

    申请号:US15453790

    申请日:2017-03-08

    Abstract: An ‘L’ shaped dynamically configurable impedance matching circuit is presented herein. The circuit can include a series element and a shunt element. The shunt element in the L-shaped impedance matching circuit can be moved or modified based on the impedance of the circuit elements in electrical communication with each side of the impedance matching circuit. Thus, in some cases, the impedance matching circuit may be a flexible circuit that can be dynamically modified based on the environment or configuration of the wireless device that includes the impedance matching circuit.

    DIVERSITY MODULES FOR PROCESSING RADIO FREQUENCY SIGNALS

    公开(公告)号:US20190229775A1

    公开(公告)日:2019-07-25

    申请号:US16262467

    申请日:2019-01-30

    Abstract: Diversity modules for processing radio frequency (RF) signals are provided herein. In certain implementations a diversity module includes a first terminal, a second terminal, a low band processing circuit that generates a low band signal based on one or more diversity signals, a mid band processing circuit that generates a mid band signal based on the one or more diversity signals and that provides the mid band signal to the second terminal, a high band processing circuit that generates a high band signal based on the one or more diversity signals, and a multi-throw switch that provides the low band signal to the first terminal in a first state and that provides the high band signal to the first terminal in a second state.

    Mixed mode time interleaved digital-to-analog converter for radio-frequency applications
    10.
    发明授权
    Mixed mode time interleaved digital-to-analog converter for radio-frequency applications 有权
    用于射频应用的混合模式时间交织数模转换器

    公开(公告)号:US09088298B2

    公开(公告)日:2015-07-21

    申请号:US14266844

    申请日:2014-05-01

    Abstract: Disclosed are systems, devices and methods related to mixed mode time interleaved digital-to-analog converters (DACs). In some embodiments, such DACs can be utilized for radio-frequency (RF) applications. In some embodiments, a DAC for RF applications can include a first circuit configured to receive a digital signal and perform a first operation to yield an increased bandwidth of the DAC. The DAC can further include a second circuit configured to perform a second operation on the digital signal to yield an analog signal representative of the digital signal. The second circuit can be further configured to reduce or remove an image within the increased bandwidth.

    Abstract translation: 公开了与混合模式时间交织的数模转换器(DAC)相关的系统,设备和方法。 在一些实施例中,这样的DAC可以用于射频(RF)应用。 在一些实施例中,用于RF应用的DAC可以包括被配置为接收数字信号并执行第一操作以产生DAC的增加的带宽的第一电路。 DAC还可以包括被配置为对数字信号执行第二操作以产生表示数字信号的模拟信号的第二电路。 第二电路可以被进一步配置为在增加的带宽内减少或去除图像。

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