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    BUFFER INPUT IMPEDANCE COMPENSATION IN A REFERENCE CLOCK SIGNAL BUFFER
    41.
    发明申请
    BUFFER INPUT IMPEDANCE COMPENSATION IN A REFERENCE CLOCK SIGNAL BUFFER 审中-公开
    参考时钟信号缓冲器中的缓冲器输入阻抗补偿

    公开(公告)号：WO2014018178A1

    公开(公告)日：2014-01-30

    申请号：PCT/US2013/045375

    申请日：2013-06-12

    Applicant: QUALCOMM INCORPORATED

    Inventor： FAN, Bin ,  TANG, Yiwu ,  WANG, Kevin Hsi Huai

    IPC: H04B1/16 ,  H04L7/00

    CPC classification number: H03L3/00 ,  H04W52/029 ,  Y02D70/00 ,  Y02D70/122 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164

    Abstract: A system (10) for managing a reference clock signal includes an XO (22), a signal buffer (24) coupled to the XO (22) and configured to drive a reference clock signal generated by the XO (22), and a first IC (12) coupled to the signal buffer (24). The first IC (12) includes an XO input buffer (32) configured to receive the reference clock signal, to switch between an enabled, operational state and a disabled state, and to have a first operational impedance while in the enabled state; an impedance equivalence circuit (34) configured to be in an enabled, operational state when the XO input buffer (32) is in its disabled state and vice versa and to have a second operational impedance while in the enabled state that is equivalent to the first operational impedance; and a control mechanism (36) configured to switch the XO input buffer (32) and the impedance equivalence circuit (34) between the enabled state and the disabled state.

    Abstract translation: 用于管理参考时钟信号的系统（10）包括XO（22），耦合到XO（22）并被配置为驱动由XO（22）产生的参考时钟信号的信号缓冲器（24），以及第一 IC（12）耦合到信号缓冲器（24）。 第一IC（12）包括被配置为接收参考时钟信号的XO输入缓冲器（32），以在启用状态，操作状态和禁用状态之间切换，并且在处于使能状态时具有第一操作阻抗; 阻抗等效电路（34）被配置为当XO输入缓冲器（32）处于其禁用状态并且反之亦然时处于使能的操作状态，并且具有第二操作阻抗，同时处于使能状态，等效于第一 工作阻抗; 以及配置为在所述使能状态和所述禁用状态之间切换所述XO输入缓冲器（32）和所述阻抗等效电路（34）的控制机构（36）。

    CONFIGURABLE MULTI-MODE OSCILLATORS
    42.
    发明申请
    CONFIGURABLE MULTI-MODE OSCILLATORS 审中-公开
    可配置的多模振荡器

    公开(公告)号：WO2014008141A1

    公开(公告)日：2014-01-09

    申请号：PCT/US2013/048742

    申请日：2013-06-28

    Applicant: QUALCOMM INCORPORATED

    Inventor： CHOI, Jaehyouk ,  TANG, Yiwu

    IPC: H03B5/12

    CPC classification number: H03B5/1215 ,  H03B5/1225 ,  H03B5/1228 ,  H03B5/1234 ,  H03B5/124 ,  H03B5/1278 ,  H03B2200/0046 ,  H03B2200/0048 ,  H03B2200/0062 ,  H03B2200/0082

    Abstract: Multi-mode oscillators supporting multiple modes and having different desirable characteristics (e.g., good phase noise or low power consumption) in different modes are disclosed. In an exemplary design, an apparatus includes first and second transistors of a first transistor type (e.g., NMOS transistors) and third and fourth transistors of a second transistor type (e.g., PMOS transistors) for a multi-mode oscillator. The third and fourth transistors are coupled (e.g., directly) to the first and second transistors. The first and second transistors are enabled in a first mode to provide signal gain for the oscillator and generate an oscillator signal in the first mode. The first to fourth transistors are enabled in a second mode to provide signal gain for the oscillator and generate the oscillator signal in the second mode. Different supply voltages may be provided at different supply nodes of the oscillator in the first and second modes.

    Abstract translation: 公开了支持多种模式并具有不同模式的不同期望特性（例如良好的相位噪声或低功耗）的多模式振荡器。 在示例性设计中，装置包括第一晶体管类型（例如，NMOS晶体管）的第一和第二晶体管以及用于多模式振荡器的第二晶体管类型（例如PMOS晶体管）的第三和第四晶体管。 第三和第四晶体管耦合（例如，直接）到第一和第二晶体管。 第一和第二晶体管在第一模式中被使能以提供振荡器的信号增益并且在第一模式中产生振荡器信号。 第一至第四晶体管在第二模式下被使能以提供振荡器的信号增益并在第二模式中产生振荡器信号。 可以在第一和第二模式中在振荡器的不同供应节点处提供不同的电源电压。

    METHODS AND APPARATUS FOR IMPLEMENTING PHASE ROTATION AT BASEBAND FREQUENCY FOR TRANSMIT DIVERSITY
    44.
    发明申请
    METHODS AND APPARATUS FOR IMPLEMENTING PHASE ROTATION AT BASEBAND FREQUENCY FOR TRANSMIT DIVERSITY 审中-公开
    用于实施基带频率的发射多径相位旋转的方法和装置

    公开(公告)号：WO2010014983A2

    公开(公告)日：2010-02-04

    申请号：PCT/US2009/052578

    申请日：2009-08-03

    Applicant: QUALCOMM INCORPORATED ,  TANG, Yiwu ,  HOLENSTEIN, Christian ,  CASSIA, Marco ,  RANJAN, Mahim

    Inventor： TANG, Yiwu ,  HOLENSTEIN, Christian ,  CASSIA, Marco ,  RANJAN, Mahim

    IPC: H04L27/00

    CPC classification number: H04B7/0682 ,  H04L1/0618 ,  H04L1/08

    Abstract: An apparatus for implementing phase rotation at baseband frequency for transmit diversity may include a primary transmit signal path and a diversity transmit signal path. Both the primary transmit signal path and the diversity transmit signal path may receive a primary transmit signal. A signal selector within the diversity transmit signal path may perform phase rotation with respect to the primary transmit signal while the primary transmit signal is at a baseband frequency, thereby producing a diversity transmit signal.

    Abstract translation: 用于实现用于发射分集的基带频率的相位旋转的装置可以包括主发射信号路径和分集发射信号路径。 主发射信号路径和分集发射信号路径都可以接收主发射信号。 在主发射信号处于基带频率的同时，分集发射信号路径内的信号选择器可以执行相对于主发射信号的相位旋转，从而产生分集发射信号。

    MULTI-WAY DIVERSITY RECEIVER WITH MULTIPLE SYNTHESIZERS IN A CARRIER AGGREGATION TRANSCEIVER
    48.
    发明公开
    MULTI-WAY DIVERSITY RECEIVER WITH MULTIPLE SYNTHESIZERS IN A CARRIER AGGREGATION TRANSCEIVER 审中-公开
    MEHRWEG-DIVERSITÄTSEMPFÄNGERMIT MEHREREN SYNTHESIZERN BEI EINEMTRÄGERAGGREGATIONSSENDE-EMPFÄNGER

    公开(公告)号：EP3143699A1

    公开(公告)日：2017-03-22

    申请号：EP15720823.2

    申请日：2015-04-03

    Applicant: Qualcomm Incorporated

    Inventor： LEUNG, Lai Kan ,  NARATHONG, Chiewcharn ,  RANGARAJAN, Rajagopalan ,  PAN, Dongling ,  TANG, Yiwu ,  TASIC, Aleksandar Miodrag

    IPC: H04B1/00

    CPC classification number: H04B7/0897 ,  H04B1/0082 ,  H04B1/16 ,  H04L27/152

    Abstract: Certain aspects of the present disclosure provide multi-way diversity receivers with multiple synthesizers. Such a multi-way diversity receiver may be implemented in a carrier aggregation (CA) transceiver. One example wireless reception diversity circuit generally includes three or more receive paths for processing received signals and two or more frequency synthesizing circuits configured to generate local oscillating signals to downconvert the received signals. Each of the frequency synthesizing circuits is shared by at most two of the receive paths, and each pair of the frequency synthesizing circuits may generate a pair of local oscillating signals having the same frequency.

    Abstract translation: 本公开的某些方面提供具有多个合成器的多路分集接收机。 这样的多路分集接收机可以在载波聚合（CA）收发器中实现。 一个示例的无线接收分集电路通常包括用于处理接收信号的三个或更多个接收路径，以及被配置为产生本地振荡信号以下变频接收信号的两个或更多个频率合成电路。 每个频率合成电路由至多两个接收路径共享，并且每对频率合成电路可以产生具有相同频率的一对本地振荡信号。

    VARACTORLESS TUNABLE OSCILLATOR
    49.
    发明公开
    VARACTORLESS TUNABLE OSCILLATOR 审中-公开
    无变压器可调谐振荡器

    公开(公告)号：EP2676365A1

    公开(公告)日：2013-12-25

    申请号：EP12710580.7

    申请日：2012-02-14

    Applicant: Qualcomm Incorporated

    Inventor： TANG, Yiwu ,  CHOI, Jaehyouk ,  PARK, Jong Min ,  NARATHONG, Chiewcharn

    IPC: H03B5/12

    CPC classification number: H03B5/1228 ,  H03B5/1212 ,  H03B5/1215 ,  H03B5/1243 ,  H03B5/1256 ,  H03B5/1296

    Abstract: A tunable oscillator circuit is disclosed. The tunable oscillator circuit includes an inductor/capacitor (LC) tank circuit comprising a primary inductor coupled in parallel with a first capacitor bank. The LC tank resonates to produce an oscillating voltage at a frequency. The tunable oscillator circuit also includes a 90 degree phase shift buffer coupled to the LC tank and a transconductor. The transconductor is coupled to the 90 degree phase shift buffer and a secondary inductor. The tunable oscillator circuit also includes a secondary inductor that is inductively coupled to the primary inductor and receives a gain-scaled oscillating current from the transconductor. By changing the transconductance, the gain-scaled oscillating current in the secondary inductor will change, thus the effective primary inductance and the oscillation frequency can be tuned.

    Abstract translation: 公开了一种可调振荡器电路。 该可调振荡器电路包括电感器/电容器（LC）储能电路，该电路包括与第一电容器组并联的初级电感器。 LC谐振电容会产生一个频率的振荡电压。 可调谐振荡器电路还包括一个90度相移缓冲器，耦合到LC谐振回路和跨导器。 跨导体耦合到90度相移缓冲器和次级电感。 可调谐振荡器电路还包括次级电感器，该次级电感器感应耦合到主级电感器并从跨导器接收增益缩放的振荡电流。 通过改变跨导，次级电感中的增益放大的振荡电流将改变，从而可以调节有效的初级电感和振荡频率。

    WIDEBAND MULTI-MODE VCO
    50.
    发明公开
    WIDEBAND MULTI-MODE VCO 有权
    多模式宽带VCO

    公开(公告)号：EP2659584A1

    公开(公告)日：2013-11-06

    申请号：EP11815885.6

    申请日：2011-12-28

    Applicant: Qualcomm Incorporated

    Inventor： LI, Guansheng ,  LIU, Li ,  TANG, Yiwu

    IPC: H03B5/12

    CPC classification number: H03B5/1228 ,  H03B5/1212 ,  H03B5/1225 ,  H03B5/1256 ,  H03B5/1262 ,  H03B5/1281 ,  H03B5/1296

    Abstract: A VCO includes a transformer-based resonator that has a first LC tank and a second LC tank. The resonator has an even resonant mode and an odd resonant mode. The VCO further includes an active transconductance network that is coupled to a two-terminal port of the first tank and is also coupled to a two-terminal port of the second tank. A first terminal of the port of the first tank is capacitively coupled to a first terminal of the port of the second tank. A second terminal of the port of the first tank is capacitively coupled to a second terminal of the port of the second tank. The active transconductance network causes the resonator to resonate in a selectable one of the even and odd resonant modes depending on a digital control signal. The VCO is fine tuned by changing the capacitances of capacitors of the tanks.

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