利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

16 条记录 (耗时 0.017 秒)

    HIGH REJECTION WIDEBAND BANDPASS N-PATH FILTER
    4.
    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.

    QUADRATURE COMBINING AND ADJUSTING
    5.
    发明公开
    QUADRATURE COMBINING AND ADJUSTING 审中-公开
    磨边联合及地点

    公开(公告)号：EP3108630A1

    公开(公告)日：2016-12-28

    申请号：EP15704667.3

    申请日：2015-02-03

    申请人： Qualcomm Incorporated

    发明人： KIM, Hong Sun ,  JAFFEE, James Ian ,  SHEEHY, Paul ,  DUNWORTH, Jeremy Darren ,  WANG, Cheng-Han ,  GUDEM, Prasad Srinivasa Siva ,  CHOKSI, Ojas Mahendra ,  PARK, Jungdong

    IPC分类号： H04L27/36

    CPC分类号： H04L27/362 ,  H04L27/206 ,  H04L27/2071 ,  H04L27/364 ,  H04L2027/0016

    摘要： Certain aspects of the present disclosure provide methods and apparatus for performing quadrature combining and adjusting. One example circuit may include first through fourth mixing circuits. The first mixing circuit may multiply a radio frequency signal with a first local oscillating signal to generate a first frequency converted signal. The second mixing circuit may multiply a radio frequency (RF) signal with a second local oscillating signal, which may be about 90° out of phase with the first local oscillating signal, to generate a second frequency converted signal. The third and fourth mixing circuits may multiply the RF signal with the second and first signals, respectively, to generate third and fourth frequency converted signals, respectively. A first combining circuit may combine the first and third frequency converted signals, and a second combining circuit may combine the second and fourth frequency converted signals.

    BLOCKER FILTERING FOR NOISE-CANCELLING RECEIVER
    10.
    发明公开
    BLOCKER FILTERING FOR NOISE-CANCELLING RECEIVER 审中-公开
    屏障过滤器接收机的噪声消除

    公开(公告)号：EP3039790A1

    公开(公告)日：2016-07-06

    申请号：EP14766078.1

    申请日：2014-08-29

    申请人： Qualcomm Incorporated

    发明人： HEDAYATI, Hajir ,  LAU, Wing Fat ,  DUNWORTH, Jeremy Darren

    IPC分类号： H04B1/12 ,  H04B1/40 ,  H04B1/10 ,  H04B1/26 ,  H04B15/06

    CPC分类号： H04B15/005 ,  H04B1/26 ,  H04B15/06

    摘要： Techniques for improving rejection of out-of-band interference in a noise-cancelling receive architecture. In an aspect, capacitors blocking in-band signals and passing through out-of-band signals destructively couple an auxiliary mixer output to a mixer output. In a further aspect, cross-coupling capacitors are provided to couple a first signal path with a second signal path of the noise-cancelling receive signal path. Baseband poly phase cross-coupling blocker filtering is further provided for out-of-band interference cancellation to create notch responses at blocker offset frequencies. The techniques disclosed may readily be adapted for multi-phase local oscillator systems.