公开(公告)号：US09276622B2

公开(公告)日：2016-03-01

申请号：US13828879

申请日：2013-03-14

Applicant: QUALCOMM Incorporated

Inventor： Li Liu ,  Chiewcharn Narathong

IPC: H04B1/16 ,  H03L7/18 ,  H03L7/099

CPC classification number: H04B1/16 ,  H03L7/099 ,  H03L7/18

Abstract: Techniques for generating a local oscillator (LO) signal are disclosed. In one design, an apparatus includes an oscillator, a divider, and a phase locked loop (PLL). The oscillator receives a control signal and provides an oscillator signal having a frequency determined by the control signal. The divider receives the oscillator signal and generates multiple divided signals of different phases. The PLL receives a reference signal and a selected divided signal and generates the control signal for the oscillator. The divider is powered on and off periodically and wakes up in one of multiple possible states, with each state being associated with a different phase of the selected divided signal. Phase continuity of the selected divided signal is ensured by using the divider in a feedback loop with the PLL. The PLL locks the selected divided signal to the reference signal, and the selected divided signal has continuous phase due to the reference signal having continuous phase.

Abstract translation: 公开了用于产生本地振荡器（LO）信号的技术。 在一种设计中，装置包括振荡器，分频器和锁相环（PLL）。 振荡器接收控制信号并提供具有由控制信号确定的频率的振荡器信号。 分频器接收振荡器信号并产生不同相位的多个分频信号。 PLL接收参考信号和选择的分频信号，并产生振荡器的控制信号。 分频器周期性地通电和关断，并在多个可能状态之一中唤醒，每个状态与所选分频信号的不同相位相关联。 通过在与PLL的反馈环路中使用分频器来确保选择的分频信号的相位连续性。 PLL将所选择的分频信号锁定到参考信号，并且由于具有连续相位的参考信号，所选择的分频信号具有连续相位。

公开(公告)号：US09232562B2

公开(公告)日：2016-01-05

申请号：US13919756

申请日：2013-06-17

Applicant: QUALCOMM Incorporated

Inventor： Li Liu ,  Chiewcharn Narathong

IPC: H04W4/00 ,  H04W88/06 ,  H04B1/00 ,  H04B1/403 ,  H04W16/14 ,  H04W72/12

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

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.

Abstract translation: 公开了一种支持与不同无线电接入技术（RAT）的多个无线系统的并发通信的无线设备。 在示例性设计中，装置包括支持来自不同RAT的无线系统的并发信号接收的第一和第二接收机。 第一接收机从第一RAT的第一无线系统接收第一下行链路信号。 第二接收机从与第一RAT不同的第二RAT的第二无线系统接收第二下行链路信号。 第一和第二接收器可以同时运行。 第二接收机可以是宽带和/或可以支持载波聚合。 该装置还可以包括第一和第二本地振荡器（LO）发生器，以分别基于不同的分频比产生用于第一和第二接收器的LO信号，以便减轻压控振荡器（VCO）的拉动。

公开(公告)号：US20140375367A1

公开(公告)日：2014-12-25

申请号：US13926680

申请日：2013-06-25

Applicant: QUALCOMM Incorporated

Inventor： Wu-Hsin Chen ,  Li Liu ,  Jianyun Hu

IPC: H03K3/017 ,  H01L21/8238

CPC classification number: H03K3/017 ,  H01L21/823871 ,  H03K3/356121 ,  H03K3/356139

Abstract: In one example, a high-speed divider includes two identical pseudo-CML latches and four output inverters. Each latch includes a pair of cross-coupled signal holding transistors. A first P-channel pull-up circuit pulls up on a second output node QB of the latch. A second P-channel pull-up circuit pulls up on a first output node Q of the latch. A pull-down circuit involves four N-channel transistors. This pull-down circuit: 1) couples the QB node to ground when a clock signal CK is high and a data signal D is high, 2) couples the Q node to ground when CK is high and D is low, 3) prevents a transfer of charge between the QB and Q nodes through the pull-down circuit when D transitions during a time period when CK is low, and 4) decouples the QB and Q nodes from the pull-down circuit when CK is low.

Abstract translation: 在一个示例中，高速分频器包括两个相同的伪CML锁存器和四个输出反相器。 每个锁存器包括一对交叉耦合的信号保持晶体管。 第一P沟道上拉电路在锁存器的第二输出节点QB上拉起。 第二P沟道上拉电路在锁存器的第一输出节点Q上拉起。 下拉电路包括四个N沟道晶体管。 该下拉电路：1）当时钟信号CK为高电平且数据信号D为高电平时，将QB节点耦合到地，2）当CK为高电平且D为低电平时将Q节点接地，3）防止 当CK为低电平时，D转换时，通过下拉电路在QB和Q节点之间传输电荷;以及4）当CK为低电平时，将QB和Q节点与下拉电路解耦。

公开(公告)号：US20140370882A1

公开(公告)日：2014-12-18

申请号：US13919756

申请日：2013-06-17

Applicant: QUALCOMM Incorporated

Inventor： Li Liu ,  Chiewcharn Narathong

IPC: H04W88/06

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

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.

Abstract translation: 公开了一种支持与不同无线电接入技术（RAT）的多个无线系统的并发通信的无线设备。 在示例性设计中，装置包括支持来自不同RAT的无线系统的并发信号接收的第一和第二接收机。 第一接收机从第一RAT的第一无线系统接收第一下行链路信号。 第二接收机从与第一RAT不同的第二RAT的第二无线系统接收第二下行链路信号。 第一和第二接收器可以同时运行。 第二接收机可以是宽带和/或可以支持载波聚合。 该装置还可以包括第一和第二本地振荡器（LO）发生器，以分别基于不同的分频比产生用于第一和第二接收器的LO信号，以便减轻压控振荡器（VCO）的拉动。

公开(公告)号：US08874059B2

公开(公告)日：2014-10-28

申请号：US13800846

申请日：2013-03-13

Applicant: QUALCOMM Incorporated

Inventor： Li Liu ,  Steven C Ciccarelli ,  Shrenik Patel ,  Prasad Srinivasa Siva Gudem ,  Zixiang Yang ,  Frederic Bossu ,  Wu-Hsin Chen ,  Chiewcharn Narathong

IPC: H04B1/10 ,  H04W52/02

CPC classification number: H04W52/0238 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/21 ,  Y02D70/24

Abstract: A method for reducing power consumption on a wireless communication device is described. The wireless communication device includes a first stage active filter and a second stage active filter. A condition measurement is obtained that includes a signal measurement condition. If it is determined that the condition measurement is above a threshold, the second stage active filter is bypassed.

Abstract translation: 描述了一种用于降低无线通信设备的功耗的方法。 无线通信装置包括第一级有源滤波器和第二级有源滤波器。 获得包括信号测量条件的条件测量。 如果确定条件测量高于阈值，则旁路第二级有源滤波器。

公开(公告)号：US20140270032A1

公开(公告)日：2014-09-18

申请号：US13829232

申请日：2013-03-14

Applicant: QUALCOMM INCORPORATED

Inventor： Li Liu ,  Praveen-Kumar Sampath ,  Lai Kan Leung ,  Chiewcharn Narathong ,  Soon-Seng Lau ,  Ketan Humnabadkar ,  Raghu Narayan Challa ,  Devavrata Vasant Godbole

IPC: H04L7/00 ,  H04L7/033

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。