Invention Grant
US09356769B2 Synchronous reset and phase detecting for interchain local oscillator (LO) divider phase alignment
有权
用于链路本地振荡器(LO)分频器相位对准的同步复位和相位检测
- Patent Title: Synchronous reset and phase detecting for interchain local oscillator (LO) divider phase alignment
- Patent Title (中): 用于链路本地振荡器(LO)分频器相位对准的同步复位和相位检测
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Application No.: US14615002Application Date: 2015-02-05
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Publication No.: US09356769B2Publication Date: 2016-05-31
- Inventor: David Ta-Hsiang Lin
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: Qualcomm Incorporated
- Current Assignee: Qualcomm Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Patterson & Sheridan, L.L.P.
- Main IPC: H04L7/00
- IPC: H04L7/00 ; H04B1/40

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.
Public/Granted literature
- US20160087784A1 SYNCHRONOUS RESET AND PHASE DETECTING FOR INTERCHAIN LOCAL OSCILLATOR (LO) DIVIDER PHASE ALIGNMENT Public/Granted day:2016-03-24
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