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    LOW POWER LOCAL OSCILLATOR SIGNAL GENERATION
    41.
    发明授权
    LOW POWER LOCAL OSCILLATOR SIGNAL GENERATION 有权
    低功率局部振荡信号发生

    公开(公告)号：EP2878159B1

    公开(公告)日：2018-02-21

    申请号：EP13733477.7

    申请日：2013-06-12

    Applicant: Qualcomm Incorporated

    Inventor： LIU, Li ,  GUDEM, Prasad Srinivasa Siva ,  BOSSU, Frederic ,  NARATHONG, Chiewcharn

    IPC: H04W52/02 ,  H04B17/10 ,  H04B17/20

    CPC classification number: H04B17/102 ,  H04B17/20 ,  H04W52/0274 ,  Y02D70/00 ,  Y02D70/21

    Abstract: A method and apparatus for providing an oscillating signal within a transmitter/receiver circuit is described. The transmitter/receiver circuit may include an oscillator that generates an oscillating signal that may be provided to a low power, low gain mixer of the transmitter/receiver circuit along a shorter circuit path that includes low power circuitry, such as low power buffers and low power frequency dividers. The oscillating signal may also be provided to a high power, high gain mixer along a longer circuit path that includes high power circuitry, such as high power buffers and high power frequency dividers. Specifically, the low power circuitry is adapted to consume less power in an ON state than the high power circuitry in an ON state, and the shorter circuit path has a shorter electrical path length than the longer circuit path.

    FREQUENCY DIVIDER WITH DUTY CYCLE ADJUSTMENT WITHIN FEEDBACK LOOP
    42.
    发明公开
    FREQUENCY DIVIDER WITH DUTY CYCLE ADJUSTMENT WITHIN FEEDBACK LOOP 审中-公开
    且占空比设置分频器在反馈回路

    公开(公告)号：EP3014769A1

    公开(公告)日：2016-05-04

    申请号：EP14736260.2

    申请日：2014-06-18

    Applicant: Qualcomm Incorporated

    Inventor： CHEN, Wu-Hsin ,  SRIDHARA, Sriramgopal ,  LIU, Li

    IPC: H03K3/017 ,  H03K5/156 ,  H03K21/08

    CPC classification number: H03L7/18 ,  H03K3/017 ,  H03K5/1565 ,  H03K21/08

    Abstract: A frequency divider (300) with duty cycle adjustment within a feedback loop is disclosed. In an exemplary design, an apparatus includes at least one divider circuit (310a, 310b) and at least one duty cycle adjustment circuit (320a, 320b) coupled in a feedback loop. The divider circuit(s) receive a clock signal (input Clock) at a first frequency and provide at least one divided signal (Idivp, Idivn) at a second frequency, which is a fraction of the first frequency. The duty cycle adjustment circuit(s) adjust the duty cycle of the at least one divided signal and provide at least one duty cycle adjusted signal (ladjp, ladjn) to the divider circuit(s). The divider circuit(s) may include first and second latches (310a, 310b), and the duty cycle adjustment circuit(s) may include first and second duty cycle adjustment circuits (320a, 320b). The first and second latches and the first and second duty cycle adjustment circuits may be coupled in a feedback loop and may perform divide-by-2.

    METHOD AND APPARATUS FOR CONCURRENT COMMUNICATION WITH MULTIPLE WIRELESS COMMUNICATION SYSTEMS OF DIFFERENT RADIO ACCESS TECHNOLOGIES
    43.
    发明公开
    METHOD AND APPARATUS FOR CONCURRENT COMMUNICATION WITH MULTIPLE WIRELESS COMMUNICATION SYSTEMS OF DIFFERENT RADIO ACCESS TECHNOLOGIES 审中-公开
    方法和装置与多个无线通信系统不同无线接入技术同时通信

    公开(公告)号：EP3011675A2

    公开(公告)日：2016-04-27

    申请号：EP14739290.6

    申请日：2014-06-10

    Applicant: Qualcomm Incorporated

    Inventor： LIU, Li ,  NARATHONG, Chiewcharn

    IPC: H04B1/00 ,  H04B1/40 ,  H04W16/14 ,  H04W72/02 ,  H04W88/06

    CPC classification number: H04W88/06 ,  H04B1/0053 ,  H04B1/403 ,  H04W16/14 ,  H04W72/1215 ,  H04W76/15

    Abstract: A wireless device supporting concurrent communication with multiple wireless systems of different radio access technologies (RATs) are disclosed. In an exemplary design, an apparatus includes first and second receivers supporting concurrent signal reception from wireless systems of different RATs. The first receiver receives a first downlink signal from a first wireless system of a first RAT. The second receiver receives a second downlink signal from a second wireless system of a second RAT, which is different from the first RAT. The first and second receivers may operate concurrently. The second receiver may be broadband and/or may support carrier aggregation. The apparatus may further include first and second local oscillator (LO) generators to generate LO signals for the first and second receivers, respectively, based on different divider ratios in order to mitigate voltage controlled oscillator (VCO) pulling.

    PHASE DETECTION AND CORRECTION FOR A LOCAL OSCILLATOR GENERATOR OPERATING IN A NON-CONTINUOUS MANNER
    44.
    发明公开
    PHASE DETECTION AND CORRECTION FOR A LOCAL OSCILLATOR GENERATOR OPERATING IN A NON-CONTINUOUS MANNER 有权
    相关文章--KORREKTURFÜREINEN LOKALOSZILLATOR MIT DISKONTINUIERLICHEM BETRIEB

    公开(公告)号：EP2973998A1

    公开(公告)日：2016-01-20

    申请号：EP14715750.7

    申请日：2014-03-07

    Applicant: Qualcomm Incorporated

    Inventor： LIU, Li ,  SAMPATH, Praveen-Kumar ,  LEUNG, Lai Kan ,  NARATHONG, Chiewcharn ,  LAU, Soon-Seng ,  HUMNABADKAR, Ketan ,  CHALLA, Raghu Narayan ,  GODBOLE, Devavrata Vasant

    IPC: H03B21/01 ,  H04B17/00 ,  H04L7/00

    CPC classification number: H04L7/0331 ,  H03B21/01 ,  H03D3/009 ,  H04W52/02 ,  H04W52/0209 ,  Y02D70/1222 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/164

    Abstract: Techniques for detecting and correcting phase discontinuity of a local oscillator (LO) signal are disclosed. In one design, a wireless device includes an LO generator and a phase detector. The LO generator generates an LO signal used for frequency conversion and is periodically powered on and off. The phase detector detects the phase of the LO signal when the LO generator is powered on. The detected phase of the LO signal is used to identify phase discontinuity of the LO signal. The wireless device may further include (i) a single-tone generator that generates a single-tone signal used to detect the phase of the LO signal, (ii) a downconverter that downconverts the single-tone signal with the LO signal and provides a downconverted signal used by the phase detector to detect the phase of LO signal, and (iii) phase corrector that corrects phase discontinuity of the LO signal in the analog domain or digital domain.

    Abstract translation: 公开了用于检测和校正本地振荡器（LO）信号的相位不连续性的技术。 在一种设计中，无线设备包括LO发生器和相位检测器。 LO发生器产生用于频率转换的LO信号，并且周期性地通电和关断。 当LO发生器通电时，相位检测器检测LO信号的相位。 LO信号的检测相位用于识别LO信号的相位不连续性。 无线设备还可以包括（i）生成用于检测LO信号的相位的单音信号的单音发生器，（ii）下变频器，其使用LO信号对单音信号进行下变频，并提供 相位检测器用于检测LO信号的相位的下变频信号，以及（iii）校正模拟域或数字域中的LO信号的相位不连续性的相位校正器。

    DIVERSITY RECEIVER WITH SHARED LOCAL OSCILLATOR SIGNAL IN DIVERSITY MODE
    49.
    发明公开
    DIVERSITY RECEIVER WITH SHARED LOCAL OSCILLATOR SIGNAL IN DIVERSITY MODE 有权
    具有共享局部振荡器信号的多样性接收器在多样性模式下

    公开(公告)号：EP3297173A1

    公开(公告)日：2018-03-21

    申请号：EP17197005.6

    申请日：2013-12-20

    Applicant: QUALCOMM Incorporated

    Inventor： GUDEM, Prasad Srinivasa Siva ,  LIU, Li ,  BOSSU, Frederic

    IPC: H04B1/26 ,  H04B7/08 ,  H04B1/00 ,  H03D7/14

    CPC classification number: H03D7/1466 ,  H04B1/005 ,  H04B1/0064 ,  H04B7/0871 ,  Y02D70/40 ,  Y02D70/444

    Abstract: A multi-mode receiver is disclosed that is reconfigurable to share a local oscillator signal in diversity mode to save power consumption. In an exemplary embodiment, an apparatus includes a primary receiver having a primary mixer configured to down-convert a primary signal and a secondary mixer configured to down-convert a secondary signal in carrier aggregation mode. The apparatus also includes a supplemental mixer that uses a shared primary local oscillator (LO) signal generated by a shared primary frequency synthesizer in diversity mode to reduce power consumption. The apparatus further includes a controller configured to disable the secondary mixer and to enable the supplemental mixer to down-convert the secondary signal when operating in the diversity mode.

    Abstract translation: 公开了一种多模式接收机，其可重新配置为以分集模式共享本地振荡器信号以节省功耗。 在一个示例性实施例中，一种装置包括主接收机，该主接收机具有被配置为对主信号进行下变频的主混频器和被配置为以载波聚合模式对辅信号进行下变频的副混频器。 该装置还包括辅助混合器，其使用分集模式下的共享主要频率合成器生成的共享主要本地振荡器（LO）信号以降低功耗。 该装置还包括控制器，该控制器被配置为禁用辅助混频器并且使得辅助混频器在工作在分集模式下时对辅助信号进行下变频。

    LOW POWER LOCAL OSCILLATOR SIGNAL GENERATION
    50.
    发明公开
    LOW POWER LOCAL OSCILLATOR SIGNAL GENERATION 有权
    信号生成由当地的低功耗振荡器

    公开(公告)号：EP2878159A1

    公开(公告)日：2015-06-03

    申请号：EP13733477.7

    申请日：2013-06-12

    Applicant: Qualcomm Incorporated

    Inventor： LIU, Li ,  GUDEM, Prasad Srinivasa Siva ,  BOSSU, Frederic ,  NARATHONG, Chiewcharn

    IPC: H04W52/02

    CPC classification number: H04B17/004 ,  H04B17/102 ,  H04B17/20 ,  H04W52/0274 ,  Y02D70/00

    Abstract: A method and apparatus for providing an oscillating signal within a transmitter/receiver circuit is described. The transmitter/receiver circuit may include an oscillator that generates an oscillating signal that may be provided to a low power, low gain mixer of the transmitter/receiver circuit along a shorter circuit path that includes low power circuitry, such as low power buffers and low power frequency dividers. The oscillating signal may also be provided to a high power, high gain mixer along a longer circuit path that includes high power circuitry, such as high power buffers and high power frequency dividers. Specifically, the low power circuitry is adapted to consume less power in an ON state than the high power circuitry in an ON state, and the shorter circuit path has a shorter electrical path length than the longer circuit path.

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