Invention Grant
US07683722B2 Method and system for signal generation via a PLL with DDFS feedback path
失效
通过具有DDFS反馈路径的PLL产生信号的方法和系统
- Patent Title: Method and system for signal generation via a PLL with DDFS feedback path
- Patent Title (中): 通过具有DDFS反馈路径的PLL产生信号的方法和系统
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Application No.: US11863531Application Date: 2007-09-28
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Publication No.: US07683722B2Publication Date: 2010-03-23
- 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: H03L7/00
- IPC: H03L7/00

Abstract:
Aspects of a method and system for signal generation via a PLL with a DDFS feedback path are provided. In this regard, a phase difference between a reference signal and a feedback signal may be utilized to control a VCO, wherein the feedback signal is generated by a DDFS. Voltage, current and/or power levels of the generated feedback signal may be limited to a determined range of values. Moreover, the feedback signal may be based on an output of the VCO and a digital control word input to the DDFS. The digital control word may be programmatically controlled by, for example, a processor. Additionally, the control word may be determined based on a desired frequency of the generated feedback signal and a desired output frequency of the VCO. Accordingly, the DDFS may be clocked by the output of the VCO, or by a divided down version of the VCO output.
Public/Granted literature
- US20090085673A1 METHOD AND SYSTEM FOR SIGNAL GENERATION VIA A PLL WITH DDFS FEEDBACK PATH Public/Granted day:2009-04-02
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