Patent ID: 7924965

Claim:
A multimodulus frequency divider, comprising a plurality of multimodulus frequency dividing units connected in series, and the multimodulus frequency divider comprises: an input phase selection unit, receiving a plurality of synchronous input signals and a selection signal, selecting a phase of one synchronous input signal among the synchronous input signals in response to the selection signal, so as to generate a selected synchronous input signal; a frequency dividing and phase generating unit, coupled to the input phase selection unit, receiving the selected synchronous input signal, and dividing a frequency of the selected synchronous input signal, so as to obtain an output multimodulus frequency dividing signal; a phase selection control unit, coupled to the frequency dividing and phase generating unit of the last multimodulus frequency dividing unit, receiving the output multimodulus frequency dividing signal and a control signal, and taking the output multimodulus frequency dividing signal and the control signal into a logic calculation, so as to generate a feedback signal; and a phase state selection unit, coupled to the phase selection control unit, changing a state of the selection signal into another state or maintaining the state of the selection signal in response to whether the feedback signal is triggered or not, so as to generate a recording phase signal.