Invention Grant
- Patent Title: Circuit for recovering an output clock from a source clock
- Patent Title (中): 从源时钟恢复输出时钟的电路
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Application No.: US12077241Application Date: 2008-03-17
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Publication No.: US08391419B2Publication Date: 2013-03-05
- Inventor: Jonathan Ku , Sen-Jung Wei
- Applicant: Jonathan Ku , Sen-Jung Wei
- Applicant Address: US CA Santa Clara
- Assignee: Synaptics, Inc.
- Current Assignee: Synaptics, Inc.
- Current Assignee Address: US CA Santa Clara
- Agency: Roeder & Broder LLP
- Agent James P. Broder
- Main IPC: H04L27/00
- IPC: H04L27/00 ; H04L7/00

Abstract:
An output clock recovery circuit (10) for recovering an output clock (14) from a source clock (12) and time stamp information (18A, 18B) includes a time stamp translator (22) and a phase-locked loop circuit (17) including a fraction processor (34). The time stamp translator (22) receives the time stamp information (18A, 18B) and uses an algorithm that translates the time stamp information (18A, 18B) into a time stamp decimal component (48) and a time stamp integer component (50). The time stamp decimal component (48) is less than one and is processed by the fraction processor (34). The time stamp integer component (50) is maintained within a predetermined range of integers that are greater than zero. The output of the fraction processor (34) and the time stamp integer component (50) can be input into a feedback divider (36) of a feedback loop of the phase-locked loop circuit (17) to recover the output clock (14). The fraction processor (34) can include a fraction accumulator or a delta-sigma type of fractional-N phase-locked loop circuit.
Public/Granted literature
- US20090232262A1 Circuit for recovering an output clock from a source clock Public/Granted day:2009-09-17
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