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49 条记录 (耗时 0.017 秒)

    RADIO RECEIVER FOR CARRIER AGGREGATION
    33.
    发明公开
    RADIO RECEIVER FOR CARRIER AGGREGATION 有权
    无线电接收机用于载波聚合

    公开(公告)号：EP3192179A1

    公开(公告)日：2017-07-19

    申请号：EP14761994.4

    申请日：2014-09-10

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： NILSSON, Magnus ,  JAKOBSSON, Peter

    IPC分类号： H04B1/00

    CPC分类号： H03D7/1466 ,  H04B1/0053 ,  H04B1/0067 ,  H04L5/001 ,  H04L27/2647

    摘要： A radio receiver circuit (10) configurable to operate in a carrier-aggregation, CA, mode and in a non-CA mode is disclosed. It comprises a first receive path (30) arranged to be operatively connected to an antenna (15) and a second receive path (40) arranged to be operatively connected to the same antenna (15). It further comprises a control unit (50) operatively connected to the first receive path (30) and the second receive path (40). In the CA mode, the control unit (50) controls the first receive path (30) to receive a first CC (6) and the second receive path to receive a second CC (8). In the non-CA mode, the control unit (50) selectively controls the first receive path (30) and the second receive path (40) to both receive the same single CC (6).

    摘要翻译： 公开了可配置为以载波聚合，CA模式和非CA模式操作的无线电接收器电路（10）。 它包括布置成可操作地连接到天线（15）的第一接收路径（30）和布置成可操作地连接到同一天线（15）的第二接收路径（40）。 它还包括可操作地连接到第一接收路径（30）和第二接收路径（40）的控制单元（50）。 在CA模式中，控制单元（50）控制第一接收路径（30）接收第一CC（6），第二接收路径接收第二CC（8）。 在非CA模式中，控制单元（50）选择性地控制第一接收路径（30）和第二接收路径（40）以接收相同的单个CC（6）。

    MIXER CIRCUIT AND METHOD
    35.
    发明公开
    MIXER CIRCUIT AND METHOD 审中-公开
    混频器电路和方法

    公开(公告)号：EP1961112A1

    公开(公告)日：2008-08-27

    申请号：EP06819530.4

    申请日：2006-11-16

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： MATTISSON, Sven ,  NILSSON, Magnus ,  NYDAHL, Andreas ,  MATTSSON, Thomas

    IPC分类号： H03D7/14

    CPC分类号： H03D7/1441 ,  H03D7/1458 ,  H03D7/165 ,  H03D2200/0023 ,  H03D2200/0084 ,  H03H19/008

    摘要： A method of providing an input signal to a mixer circuit comprises coupling an output signal from a low-noise amplifier circuit to a mixer input of the mixer circuit via an AC coupling circuit, comprising an inductive of capacitive coupling circuit. For capacitive coupling configurations, a coupling capacitor is configured to have a capacitance value determined as a function of a transconductance sensitivity of the mixer circuit. For balanced output configurations of the low-noise amplifier circuit, matched coupling capacitors are used for coupling the balanced output signals to respective inputs of the mixer circuit. In one embodiment, the mixer circuit comprises a quadrature mixer circuit, which may be in a balanced or double-balanced configuration. In another embodiment, the mixer circuit comprises a four-phase mixer circuit, which may be configured as a balanced four-phase mixer circuit coupled to the low-noise amplifier circuit via inductive or capactive embodiments of the coupling circuit.

    METHOD AND APPARATUS FOR REDUCING DYNAMIC RANGE OF A POWER AMPLIFIER
    36.
    发明公开
    METHOD AND APPARATUS FOR REDUCING DYNAMIC RANGE OF A POWER AMPLIFIER 有权
    方法和装置以降低功率放大器的动态部分

    公开(公告)号：EP1537649A1

    公开(公告)日：2005-06-08

    申请号：EP03792217.6

    申请日：2003-07-21

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： NILSSON, Magnus

    IPC分类号： H03C5/00

    CPC分类号： H03C3/0933 ,  H03C3/0925 ,  H03C5/00

    摘要： An output-power threshold is selected such that one or more signal requirements is not outside a pre-determined range when output power of a polar transmitter is less than the output-power threshold. A determination is made whether the output power is less than the threshold. In response to a determination that the output power is less than the threshold, amplitude modulation of a polar signal transmitted by the polar transmitter is disabled. When the output power meets or exceeds the output-power threshold, the polar signal transmitted by the polar transmitter is both amplitude and phase modulated.

    TRIMMING OF A TWO POINT PHASE MODULATOR
    37.
    发明公开
    TRIMMING OF A TWO POINT PHASE MODULATOR 有权
    有校正加强调制信号的相位环形调制器

    公开(公告)号：EP1535390A2

    公开(公告)日：2005-06-01

    申请号：EP03788893.0

    申请日：2003-09-08

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： NILSSON, Magnus

    IPC分类号： H03C3/09

    CPC分类号： H03C3/0991 ,  H03C3/0925 ,  H03C3/0933 ,  H03L7/0893

    摘要： Method and system are disclosed for automated calibration of the VCO gain in phase modulators. The method and system of the invention comprises synthesizing, in a phase modulator, a signal having a given output frequency using a controlled oscillator having a frequency control input, a modulation input, and a feedback loop. A frequency control signal is applied to the frequency control input, and gain variation of the controlled oscillator is compensated for outside of the feedback loop via the modulation input. The method and system of the invention may be employed in any telecommunication system that uses phase and amplitude modulation, including EDGE and WCDMA systems.

    PHASE LOCKED LOOP WITH A LINEAR PHASE DETECTOR
    38.
    发明授权
    PHASE LOCKED LOOP WITH A LINEAR PHASE DETECTOR 有权
    WITH A线性相位检测相位控制环路

    公开(公告)号：EP1374404B1

    公开(公告)日：2004-11-24

    申请号：EP02724201.5

    申请日：2002-03-06

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： NILSSON, Magnus

    IPC分类号： H03L7/089 ,  H03D13/00

    CPC分类号： H03D13/004 ,  H03L7/0891 ,  H03L7/1976

    摘要： A fast-locking phase detector includes a first input that receives a first signal (fref), a second input that receives a second signal (Presc), and a comparison circuit (1001-1011; 1101-1111) that generates an output current (I out) in proportion to a phase difference between the first signal and the second signal. An operating point circuit (1013-1021; 1113-1121) selectively maintains a first operating point of the phase detector when a phase of the first signal leads a phase of the second signal, and maintains a second operating point of the phase detector when the phase of the first signal lags the phase of the second signal. The first and second operating points are different from one another. Each of the first and second operating point causes the output current to vary substantially linearly for a predetermined range of both positive and negative phase differences between the first signal and the second signal.