A system including a phase comparator to compare a first signal and a second signal to generate a phase error signal, and a controller to generate an adjusted phase error signal from the phase error signal in response to an amplitude of at least one of the first signal and the second signal....http://www.google.com.hk/patents/US8179994?utm_source=gb-gplus-share專利 US8179994 - Phase error de-glitching circuit and method of operating
