SKEW CORRECTION SYSTEM ELIMINATING PHASE AMBIGUITY BY USING REFERENCE MULTIPLICATION

摘要

A system for generating a local clock signal, the system including: a skew correction circuit for receiving first and second periodic signals that have associated skews, wherein the skew correction circuit is configured to use the received first and second periodic signals to generate a third periodic signal that has a fixed skew between the skews of the first and second periodic signals; a phase detector with a first input that receives the third periodic signal from the skew correction circuit and a second input; a variable oscillator for generating an output signal having a frequency that is controlled by the phase detector; and a frequency divider for dividing the frequency of the oscillator's output signal, wherein the frequency-divided output signal is fed back to the second input of the phase detector, and wherein the local clock signal is derived from the oscillator's output signal.