Invention Grant
- Patent Title: Method and apparatus for fractional-N synthesis
- Patent Title (中): 分数N合成方法和装置
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Application No.: US10015993Application Date: 2001-12-12
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Publication No.: US07231196B2Publication Date: 2007-06-12
- Inventor: Hung-Ming Chien , Meng-An Pan , Stephen Wu , Brima Ibrahim
- Applicant: Hung-Ming Chien , Meng-An Pan , Stephen Wu , Brima Ibrahim
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Garlick Harrison & Markison
- Agent James A. Harrison
- Main IPC: H04B7/00
- IPC: H04B7/00 ; H04B1/18

Abstract:
A method and apparatus for fractional-N synthesis includes processing that begins by generating a 1st feedback frequency from the output frequency based on a fixed divider value. The processing continues by generating a 2nd feedback frequency from the output frequency based on a selectable divider value, a modified fractional value of the divider value, and a modified integer value of the divider value. The processing continues by determining whether the fractional value of the divider value is within a range of fractional values. If so, the 1st feedback frequency is used to produce the output. If the fractional portion of the divider value is not within the range of fractional values, the 2nd feedback frequency is used to produce the output frequency.
Public/Granted literature
- US20030109237A1 Method and apparatus for fractional-N synthesis Public/Granted day:2003-06-12
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