Patent ID: 6958633

Claim:
A method for performing non-integer frequency division, providing at least an output clock according to a plurality of reference clocks, and making the period of the output clock a predetermined multiple of the period of the reference clocks, the method comprising: receiving a plurality of reference clocks, the periods of the reference clocks being the same, and the phases between the different reference clocks being different; triggering a plurality of intermediate signals according to each period of the reference clocks, there being M intermediate signals for each reference clock, and making the minimum period of the intermediate signals M times the period of the corresponding reference clock, the phases between the intermediate signals corresponding to the same reference clock being different; and performing a logic operation between at least two intermediate signals respectively corresponding to two different reference clocks, providing an output clock according to the result of the logic operation, the minimum period of the output clock being shorter than the period of the intermediate signals.