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    ATTENUATOR
    2.
    发明申请
    ATTENUATOR 审中-公开

    公开(公告)号：US20190280672A1

    公开(公告)日：2019-09-12

    申请号：US16422651

    申请日：2019-05-24

    Applicant: Telefonaktiebolaget LM Ericsson (publ)

    Inventor： Fenghao MU ,  Sven MATTISSON

    IPC: H03H11/24 ,  H03H7/25 ,  H04B1/40 ,  H04B7/06 ,  H03G1/00

    Abstract: An attenuator for attenuating a signal is disclosed. The attenuator comprises a differential input port with a positive input node and a negative input node to receive the signal; and a differential output port with a positive output node and a negative output node to output the attenuated signal. The attenuator further comprises a first switched resistor network connected between the positive input node and the positive output node; and a second switched resistor network connected between the negative input node and the negative output node. Further a pair of compensation paths is connected to the first and second switched resistor networks for cancellation their parasitic leakages, where a first compensation path is connected between the positive input node and the negative output node, and a second compensation path is connected between the negative input node and the positive output node. The attenuator further comprises a control circuit to generate control signals for controlling the first and second switched resistor networks.

    POWER AMPLIFIER ARRANGEMENT COMPRISING RUTHROFF TRANSFORMER
    3.
    发明申请
    POWER AMPLIFIER ARRANGEMENT COMPRISING RUTHROFF TRANSFORMER 有权

    公开(公告)号：US20220321061A1

    公开(公告)日：2022-10-06

    申请号：US17626418

    申请日：2019-07-11

    Applicant: Telefonaktiebolaget LM Ericsson (publ)

    Inventor： Mingquan BAO ,  Sven MATTISSON

    IPC: H03F1/02 ,  H03F3/24

    Abstract: There is provided a power amplifier arrangement for amplifying an input power signal to an output power signal. The power amplifier arrangement comprises a main amplifier having an input and an output. The power amplifier arrangement comprises at least one auxiliary amplifier, each having an input and an output. The power amplifier arrangement comprises a power divider having an input and outputs. The input of the power divider is configured to receive the input power signal. Each output of the power divider is connected to a respective input of the power amplifiers. The power amplifier arrangement comprises a Doherty combiner comprising at least one Ruthroff transformer and configured to combine all the outputs of the power amplifiers to, at an output of the Doherty combiner, produce the output power signal.

    AN ATTENUATOR
    4.
    发明申请
    AN ATTENUATOR 审中-公开

    公开(公告)号：US20180337659A1

    公开(公告)日：2018-11-22

    申请号：US15532694

    申请日：2014-12-03

    Applicant: Telefonaktiebolaget LM Ericsson (publ)

    Inventor： Fenghao MU ,  Sven MATTISSON

    IPC: H03H11/24 ,  H03G1/00 ,  H04B1/40 ,  H04B7/06

    CPC classification number: H03H11/245 ,  H03G1/0088 ,  H03G1/0094 ,  H03G2201/106 ,  H03H7/25 ,  H04B1/40 ,  H04B7/0608

    Abstract: An attenuator for attenuating a signal is disclosed. The attenuator comprises a differential input port with a positive input node and a negative input node to receive the signal; and a differential output port with a positive output node and a negative output node to output the attenuated signal. The attenuator further comprises a first switched resistor network connected between the positive input node and the positive output node; and a second switched resistor network connected between the negative input node and the negative output node. Further a pair of compensation paths is connected to the first and second switched resistor networks for cancellation their parasitic leakages, where a first compensation path is connected between the positive input node and the negative output node, and a second compensation path is connected between the negative input node and the positive output node. The attenuator further comprises a control circuit to generate control signals for controlling the first and second switched resistor networks.

    RECEIVING A PLURALITY OF RADIO FREQUENCY BANDS
    6.
    发明申请
    RECEIVING A PLURALITY OF RADIO FREQUENCY BANDS 有权
    接收无数无线电频段的大量数据

    公开(公告)号：US20170054456A1

    公开(公告)日：2017-02-23

    申请号：US15024729

    申请日：2015-03-31

    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

    Inventor： Daniele MASTANTUONO ,  Sven MATTISSON ,  Roland STRANDBERG ,  Lars SUNDSTRÖM

    IPC: H04B1/00 ,  H03F3/45 ,  H03G3/20 ,  H03F3/193

    CPC classification number: H04B1/0053 ,  H03F3/193 ,  H03F3/45179 ,  H03F2200/111 ,  H03F2200/222 ,  H03F2200/294 ,  H03F2200/333 ,  H03F2200/451 ,  H03F2203/45216 ,  H03F2203/45288 ,  H03F2203/45318 ,  H03G3/20 ,  H04B1/005

    Abstract: A radio frequency receiver comprises a plurality of parallel receiving paths, wherein each path can receive a radio frequency signal in one of a plurality of radio frequency bands and amplify the received signal in a low noise amplifier. The amplified signals from the plurality of parallel paths are combined to one combined radio frequency signal in a common summation node and down-converted to a lower frequency signal in a mixer circuit. Each low noise amplifier comprises a low noise transconductance circuit providing a current signal to drive the common summation node, and an automatic gain control circuit in each path compensates for variations in signal strength independently of signal strengths of signals received by the other receiving paths. The receiver is suitable for simultaneous multiple band reception, where received signal strength can vary between the frequency bands.

    Abstract translation: 射频接收机包括多个并行接收路径，其中每个路径可以接收多个射频频带之一的射频信号，并在低噪声放大器中放大接收的信号。 来自多个并行路径的经放大的信号被组合到公共求和节点中的一个组合射频信号，并在混频器电路中下变频为较低频率信号。 每个低噪声放大器包括提供电流信号以驱动公共求和节点的低噪声跨导电路，并且每个路径中的自动增益控制电路独立于由其它接收路径接收的信号的信号强度补偿信号强度的变化。 接收机适用于同时多频带接收，其中接收信号强度可以在频带之间变化。

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