Invention Grant
US07646824B2 Method and system for a fast-switching phase-locked loop using a direct digital frequency synthesizer
失效
使用直接数字频率合成器的快速切换锁相环的方法和系统
- Patent Title: Method and system for a fast-switching phase-locked loop using a direct digital frequency synthesizer
- Patent Title (中): 使用直接数字频率合成器的快速切换锁相环的方法和系统
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Application No.: US11680253Application Date: 2007-02-28
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Publication No.: US07646824B2Publication Date: 2010-01-12
- Inventor: Ahmadreza Rofougaran
- Applicant: Ahmadreza Rofougaran
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: McAndrews, Held & Malloy, Ltd.
- Main IPC: H03K7/06
- IPC: H03K7/06

Abstract:
Aspects of a method and system for a fast-switching Phase-Locked Loop using a Direct Digital Frequency synthesizer may include generating a second signal from a first signal by: frequency translating an inphase component of the first signal utilizing a filtered fast-switching oscillating signal generated using at least a direct digital frequency synthesizer (DDFS), and frequency translating a corresponding quadrature component of the first signal utilizing a phase-shifted version of the generated and filtered fast-switching oscillating signal. The inphase and quadrature components of the first signal may be multiplied with the filtered fast-switching oscillating signal and a phase-shifted version of the filtered fast-switching oscillating signal, respectively. The filtered fast-switching oscillating signal may be obtained by removing at least one frequency-sum term of the fast-switching oscillating signal, where the fast-switching signal oscillating signal may be generated from a signal generated by the DDFS that may be multiplied with an oscillating reference signal.
Public/Granted literature
- US20080204150A1 Method and System for a Fast-Switching Phase-Locked Loop Using a Direct Digital Frequency Synthesizer Public/Granted day:2008-08-28
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