US Patent 7218699 Frequency divider

A divider to divide a frequency Fe comprises at least the following elements: three flip-flop circuits, each of the flip-flop circuits receiving the frequency to be divided, every feedback loop between an output of a flip-flop circuit and its input or the input of the other flip-flop circuits comprising a single multiplexer, wherein one of the flip-flop circuits commands the loading of all the flip-flop circuits during one period of the frequency A multiplexer has two inputs, one selection bit and one output and is integrated into a flip-flop circuit.