Invention Grant
US08391419B2 Circuit for recovering an output clock from a source clock 有权
从源时钟恢复输出时钟的电路

Circuit for recovering an output clock from a source clock
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
Information query
Patent Agency Ranking
0/0