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    AMPLIFICATION DEVICE INCORPORATING LIMITING
    7.
    发明公开
    AMPLIFICATION DEVICE INCORPORATING LIMITING 审中-公开

    公开(公告)号：EP3360249A1

    公开(公告)日：2018-08-15

    申请号：EP15781317.1

    申请日：2015-10-05

    申请人： Telefonaktiebolaget LM Ericsson (PUBL)

    发明人： NILSSON, Magnus

    IPC分类号： H03F1/52 ,  H03F3/189 ,  H03F3/45

    CPC分类号： H03F1/523 ,  H03F1/52 ,  H03F3/189 ,  H03F3/193 ,  H03F3/45 ,  H03F3/45179 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2203/45116 ,  H03F2203/45526 ,  H03G3/3036 ,  H04B1/16

    摘要： An amplification device (100) comprises an amplifier circuit (110) and a limiter (120). The amplifier circuit (110) comprises a signal input (111) for an input signal to be amplified and a first signal output (112) for a first output signal. The limiter (120) comprises a differential amplifier (125) comprising a first differential amplifier input (129) for a threshold control signal, a second differential amplifier input (113) for a feedback signal, and a differential amplifier output (124) for a threshold signal indicative of a difference between the threshold control signal and the feedback signal. The limiter (120) also comprises a first diode (121) having a first anode (122) coupled to the first signal output (112) and a first cathode (123) coupled to the differential amplifier output (124), and a feedback stage (128) coupled between the differential amplifier output (124) and the second differential amplifier input (113). The feedback stage (128) is arranged to generate the feedback signal dependent on the threshold signal.

    RADIO RECEIVER FOR CARRIER AGGREGATION
    8.
    发明授权
    RADIO RECEIVER FOR CARRIER AGGREGATION 有权
    无线电接收机用于载波聚合

    公开(公告)号：EP3192179B1

    公开(公告)日：2018-03-28

    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 ,  H03D7/14 ,  H04L5/00 ,  H04L27/26

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

    摘要： A radio receiver circuit (10) comprises a first direct conversion receiver (30) and a second direct conversion receiver (40) arranged to be operatively connected to the same antenna (15). In a first mode of operation, a first LO signal of the first direct conversion receiver (30) and a second LO signal of the second direct conversion receiver (40) have different frequencies, whereby the first direct conversion receiver (30) and the second direct conversion receiver (40) are operable to receive different radio frequency carriers. In a second mode of operation, wherein the first and second LO signals have the same frequency, whereby the first direct conversion receiver (30) and the second direct conversion receiver (40) are operable to receive the same radio frequency carrier.

    OSCILLATOR CROSSTALK COMPENSATION
    9.
    发明公开
    OSCILLATOR CROSSTALK COMPENSATION 审中-公开
    OSZILLATORÜBERSPRECHKOMPENSATION

    公开(公告)号：EP3134974A1

    公开(公告)日：2017-03-01

    申请号：EP15720281.3

    申请日：2015-04-16

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： NILSSON, Magnus

    IPC分类号： H03L7/099

    摘要： Systems and methods for mitigating crosstalk between controlled oscillators of Phase-Locked Loops (PLLs) are disclosed. In one embodiment, a system includes a first PLL including a first controlled oscillator and a second PLL. The system further includes a compensation signal generator adapted to generate a compensation signal at an offset frequency that is approximately equal to an offset between output frequencies of the first and second PLLs and apply the compensation signal to the first controlled oscillator such that the output signal of the first controlled oscillator is modulated by the compensation signal. An amplitude and a phase of the compensation signal are such that, when the compensation signal is applied to the first controlled oscillator, a crosstalk signal output by the first controlled oscillator resulting from crosstalk from the second controlled oscillator of the second PLL to the first controlled oscillator of the first PLL is mitigated.

    摘要翻译： 公开了用于减轻锁相环（PLL）的受控振荡器之间的串扰的系统和方法。 在一个实施例中，系统包括包括第一受控振荡器和第二PLL的第一PLL。 所述系统还包括补偿信号发生器，其适于产生偏移频率处的补偿信号，该补偿信号近似等于第一和第二PLL的输出频率之间的偏移量，并将补偿信号施加到第一受控振荡器，使得输出信号 第一个受控振荡器由补偿信号调制。 补偿信号的振幅和相位使得当补偿信号被施加到第一受控振荡器时，由第一受控振荡器输出的串扰信号由第二PLL的第二受控振荡器的串扰引起， 第一个PLL的振荡器得到缓解。

    MODULATION METHOD AND APPARATUS
    10.
    发明公开
    MODULATION METHOD AND APPARATUS 有权
    调制方法和装置

    公开(公告)号：EP1955436A1

    公开(公告)日：2008-08-13

    申请号：EP06830213.2

    申请日：2006-11-30

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： MATTISSON, Sven ,  NILSSON, Magnus

    IPC分类号： H03C3/40

    CPC分类号： H03C3/40

    摘要： A modulation circuit for use in a radiofrequency transmitter includes a local oscillator circuit configured to generate one or more local oscillator signals at a desired frequency and with a duty cycle at or about twenty-five percent, and a modulator configured to generate one or more modulated signals responsive to the one or more local oscillator signals and one or more baseband information signals. In at least one embodiment, the modulation circuit includes a modulator comprising a combined mixing and transconductance circuit that includes a transistor circuit for each baseband information signal serving as a modulation input to the modulator. Each transistor circuit comprises a first transistor driven by the baseband information signal and coupling a modulator output node to a corresponding transconductance element, and a second transistor driven by one of the one or more local oscillator signals and coupling the corresponding transconductance element to a signal ground node.