Re: Find paper for divider by 2 or 2.5 circuit

need paper about fractional divider design, operate above 2.5GHz, divide by 2 or 2.5, or divide by 3 or 3.5, or divider by 4 or 4.5 ...... and so on, each is OK.

Added after 5 minutes:

may use phase switching, but I can't find material about it, Help!