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30 条记录 (耗时 0.013 秒)

    Narrow-band filter having a variable center frequency
    3.
    发明公开
    Narrow-band filter having a variable center frequency 失效
    具有可变中心频率的窄带滤波器。

    公开(公告)号：EP0610911A3

    公开(公告)日：1996-03-13

    申请号：EP94101975.4

    申请日：1994-02-09

    申请人： NEC CORPORATION

    发明人： Ichihara, Masaki, c/o NEC Corporation

    IPC分类号： H03H19/00

    CPC分类号： H03H19/002

    摘要： In a narrow-band filter for filtering an input signal having a predetermined frequency and comprising first through n-th low-pass filters (13-1 to 13-n) which are connected in parallel to one another, a switching circuit time divisionally connects the first through the n-th low-pass filters between input and output terminals (11, 12). The first through the n-th low-pass filters, thereby, time divisionally filters the input signal for first through n-th filtering durations, respectively. A control circuit (30) is supplied with a frequency designation signal designating the predetermined frequency and controls the switching circuit to change at least one of the first through the n-th filtering durations in accordance with the frequency designation signal.

    Filtre suiveur à commutation
    4.
    发明公开
    Filtre suiveur à commutation 失效
    的N-路径频率跟踪滤波器。

    公开(公告)号：EP0014628A1

    公开(公告)日：1980-08-20

    申请号：EP80400125.3

    申请日：1980-01-25

    申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE Etablissement de Caractère Scientifique Technique et Industriel

    发明人： Gignoux, Michel

    IPC分类号： H03H19/00

    CPC分类号： H03H19/00 ,  H03H15/00 ,  H03H19/002

    摘要： L'invention concerne un filtre suiveur à commutation à n chemins commutés, de type passe-bande.
    Ce filtre comprend des moyens (M, T) pour prélever un signal préfittré de synchronisation des commutations des chemins. II est caractérisé en ce que les moyens (M, T) pour prélever le signal préfiltré sont constitués de manière tells que dans ledit signal préfiltré subsiste une partie du signal d'entrée (E) du filtre.
    Application au filtrage d'un signal présentant une composante utile de fréquence variable, associée à un bruit de fond important.

    MULTIBAND FILTER FOR NON-CONTIGUOUS CHANNEL AGGREGATION
    6.
    发明公开
    MULTIBAND FILTER FOR NON-CONTIGUOUS CHANNEL AGGREGATION 审中-公开
    用于非连续通道聚合的多频带滤波器

    公开(公告)号：EP3289682A1

    公开(公告)日：2018-03-07

    申请号：EP16712062.5

    申请日：2016-03-11

    申请人： Nokia Technologies Oy

    发明人： SRINI, Vason P ,  JABBOUR, Chadi ,  AGGARWAL, Sudhir

    IPC分类号： H03H19/00

    CPC分类号： H04B1/1036 ,  H03H19/002 ,  H03H19/008 ,  H03H2240/00 ,  H03H2250/00 ,  H04B1/1081

    摘要： Methods and apparatus, including computer program products, are provided for receivers. In one aspect there is provided an apparatus. In some example embodiments, there is provided an apparatus. The apparatus may include a first N-path filter configured with at least a first passband, wherein the first N-path filter is coupled to a radio frequency input port providing at least a first carrier aggregation signal, a second carrier aggregation signal, and an interfering signal; a second N-path filter configured with at least a second passband, wherein the second N-path filter is coupled to the radio frequency input port providing at least the first carrier aggregation signal, the second carrier aggregation signal, and the interfering signal; and a combiner configured to subtract a first output of the first N-path filter from a second output of the second N-path filter. Related apparatus, systems, methods, and articles are also described.

    Narrow-band filter having a variable center frequency
    7.
    发明公开
    Narrow-band filter having a variable center frequency 失效
    Schmalbandiges过滤器变量Zentralfrequenz。

    公开(公告)号：EP0610911A2

    公开(公告)日：1994-08-17

    申请号：EP94101975.4

    申请日：1994-02-09

    申请人： NEC CORPORATION

    发明人： Ichihara, Masaki, c/o NEC Corporation

    IPC分类号： H03H19/00

    CPC分类号： H03H19/002

    摘要： In a narrow-band filter for filtering an input signal having a predetermined frequency and comprising first through n-th low-pass filters (13-1 to 13-n) which are connected in parallel to one another, a switching circuit time divisionally connects the first through the n-th low-pass filters between input and output terminals (11, 12). The first through the n-th low-pass filters, thereby, time divisionally filters the input signal for first through n-th filtering durations, respectively. A control circuit (30) is supplied with a frequency designation signal designating the predetermined frequency and controls the switching circuit to change at least one of the first through the n-th filtering durations in accordance with the frequency designation signal.

    摘要翻译： 在用于对具有预定频率的输入信号进行滤波并且包括彼此并联连接的第一至第n低通滤波器（13-1至13-n）的窄带滤波器中，切换电路时间分段连接 输入和输出端（11,12）之间的第一至第n低通滤波器。 第一个到第n个低通滤波器，从而分别对输入信号进行第一至第n个滤波持续时间的分时滤波。 向控制电路（30）提供指定预定频率的频率指定信号，并根据频率指定信号控制开关电路改变第一至第n滤波持续时间中的至少一个。

    Ensemble de filtrage par commutation
    9.
    发明公开
    Ensemble de filtrage par commutation 失效
    交换过滤单元。

    公开(公告)号：EP0022695A1

    公开(公告)日：1981-01-21

    申请号：EP80400944.7

    申请日：1980-06-24

    申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE Etablissement de Caractère Scientifique Technique et Industriel

    发明人： Gignoux, Michel

    IPC分类号： H03H19/00

    CPC分类号： H03H19/002

    摘要： Ensemble de filtrage comprenant au moins deux filtres (1, 2) à chemins commutés et des moyens (5) pour appliquer à chacun des filtres (1, 2) des signaux de commande de commutation des chemins. Cet ensemble comprend en outre des moyens (C) de mise en mémoire du signal de sortie du filtre et un circuit mélangeur (6) dont une entrée reçoit à un instant considéré, le signal à filtrer; une deuxième entrée reçoit à cet instant la valeur mémorisée qu'avait le signal de sortie, un instant auparavant, séparé de l'instant considéré par un nombre entier de périodes de la composante utile du signal d'entrée.
    Application à l'analyse harmonique, aux télécommunications, au filtrage de signaux composites.

    HIGH REJECTION WIDEBAND BANDPASS N-PATH FILTER
    10.
    发明公开
    HIGH REJECTION WIDEBAND BANDPASS N-PATH FILTER 审中-公开

    公开(公告)号：EP3406030A1

    公开(公告)日：2018-11-28

    申请号：EP16826265.7

    申请日：2016-12-21

    申请人： Qualcomm Incorporated

    发明人： HEDAYATI, Hajir ,  DARVISHI, Milad ,  DUNWORTH, Jeremy Darren ,  SABOURI, Faramarz

    IPC分类号： H03H19/00

    CPC分类号： H03H19/002 ,  H03H11/40 ,  H03H11/50

    摘要： Certain aspects of the present disclosure provide an N-path filter implemented using a generalized impedance converter (GIC) circuit. The GIC circuit is configured such that the N-path filter has a desired frequency response, which may include a wide passband with steeper rejection than a conventional N-path filter with only a single pole in each filter path. Certain aspects of the present disclosure provide an N-path filter having a frequency response with multiple concurrent passbands. In certain aspects, the N-path filter with multiple passbands is implemented using the GIC circuit. In other aspects, the N-path filter may include a bandpass response circuit where an inductance of the bandpass response circuit may be implemented using gyrators.