Patent ID: 7969209
Filing Date: 2011-06-28
Classification: H03K

Abstract:
1. A frequency divider system, comprising: a phase multiplexer, the phase multiplexer receiving a plurality of phase signals having sequentially increasing phases, each phase signal of the plurality of phase signals having a phase different from every other phase of the plurality of phase signals, the phase multiplexer, in response to a phase select signal, selecting a first one of the plurality of phase signals and a second one of the plurality of phase signals that is non-complementary to the first one of the plurality of phase signals and transitioning a phase multiplexer output from a previous one of the plurality of phase signals to the selected first one of the plurality of phase signals; a first frequency divider, the first frequency divider producing a first frequency-divided signal in response to the phase multiplexer output; and a phase controller, the phase controller receiving the first frequency-divided signal and a non-frequency-divided signal defined by the second one of the plurality of phase signals bypassing the first frequency divider, the phase controller producing the phase select signal in response to the first frequency-divided signal and the non-frequency-divided signal, a transition of the second one of the plurality of phase signals triggering the phase controller to produce the phase select signal.