公开(公告)号：US09356769B2

公开(公告)日：2016-05-31

申请号：US14615002

申请日：2015-02-05

Applicant: QUALCOMM Incorporated

Inventor： David Ta-Hsiang Lin

IPC: H04L7/00 ,  H04B1/40

CPC classification number: H04B1/40 ,  H04B1/0032 ,  H04B1/30 ,  H04B1/403 ,  H04L7/0041

Abstract: Certain aspects of the present invention provide methods and apparatus for synchronizing frequency-divided oscillating signals associated with multiple radio frequency (RF) paths to be in-phase. For certain aspects, a reset pulse is input to synchronization logic for a particular RF path, and this logic retimes the reset pulse to a local synthesizer clock in this RF path. The retimed reset pulse drives the reset input of a local frequency divider for this RF path and is also appropriately delayed, buffered, and then daisy-chained to the synchronization logic in the next RF path to be repeated therein. By appropriately resetting the local frequency dividers using the synchronization logic in this manner, the frequency-divided oscillating signals for the RF paths are synchronized to operate in-phase with one another.

Abstract translation: 本发明的某些方面提供了用于将与多个射频（RF）路径相关联的分频振荡信号同步同相的方法和装置。 对于某些方面，将复位脉冲输入到用于特定RF路径的同步逻辑，并且该逻辑将复位脉冲重新定时到该RF路径中的本地合成器时钟。 重新定时复位脉冲驱动该RF路径的本地分频器的复位输入，并且还被适当地延迟，缓冲，然后菊花链连接到下一个RF路径中的同步逻辑，以在其中重复。 通过以这种方式使用同步逻辑适当地复位本地分频器，用于RF路径的分频振荡信号被同步以彼此同相运行。

公开(公告)号：US09356768B2

公开(公告)日：2016-05-31

申请号：US14495183

申请日：2014-09-24

Applicant: QUALCOMM Incorporated

Inventor： David Ta-Hsiang Lin ,  Yongwang Ding ,  Young Gon Kim ,  Thinh Cat Nguyen ,  Jeongsik Yang ,  Sang-Oh Lee

IPC: H04L7/00 ,  H03K5/22 ,  H03M1/34 ,  H04B1/40 ,  H03K5/00

CPC classification number: H03M1/34 ,  H03K5/22 ,  H03K2005/00286 ,  H04B1/40

Abstract: Certain aspects of the present invention provide methods and apparatus for detecting phase shift between signals, such as local oscillating signals in adjacent transceiver paths. One example circuit for phase detection generally includes a mixer configured to mix a first input signal having a first frequency with a second input signal having a second frequency to produce an output signal having frequency components at the sum of and the difference between the first and second frequencies; a filter connected with the mixer and configured to remove one of the frequency components at the sum of the first and second frequencies, thereby leaving a DC component; and an analog-to-digital converter (ADC) (e.g., a comparator) connected with the filter and configured to determine whether the first input signal is in-phase or out-of-phase with the second input signal based on a comparison between the DC component and a reference signal.

Abstract translation: 本发明的某些方面提供用于检测信号之间的相移的方法和装置，例如相邻收发器路径中的本地振荡信号。 用于相位检测的一个示例电路通常包括混频器，其被配置为将具有第一频率的第一输入信号与具有第二频率的第二输入信号混合，以产生具有频率分量在第一和第二频率之和之间的频率分量的输出信号 频率; 滤波器，与所述混频器连接并且被配置为以所述第一和第二频率的和去除所述频率分量中的一个，从而留下DC分量; 以及与所述滤波器连接并且被配置为基于所述第二输入信号与所述第二输入信号之间的比较来确定所述第一输入信号是与所述第二输入信号是同相还是异相的模拟 - 数字转换器（例如，比较器） DC分量和参考信号。