Patent ID: 6026134
Filing Date: 2000-02-15
Classification: H03L

Abstract:
An apparatus for detecting the phase of an input signal relative to an output signal comprising:a plurality of phase detector circuits each configured to receive (i) said input signal and (ii) a window signal, each phase detector circuit being further configured to generate a phase difference signal in response to said window signal, each of said phase difference signals being proportional to a phase difference between said input signal and said output signal;means for generating said output signal in response to said phase difference signals, said output signal having a plurality of phases;wherein each phase detector circuit operates according to at least one preselected phase of said output signaland at least one of said phase detector circuits includes a function gate having an output terminal configured to generate a pump up signal, said function gate being connected to a first memory element and further having an enable terminal for receiving said window signal.